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Sometimes parasitic Stock Photos and Images
RMR044TF–Chicken of the Woods fungi, Laetiporus sulphureus, sometimes called sulphur polypore, growing on a dead tree in woodlands in the New Forest. Hampshire
RMT8HGWF–A four day old rafflesia blooming near Kampung Poring Sabah Malaysia, sometimes called a corpse flower and parasitic on the vine of tetrastigma
RF2HKB9H2–Monotoma longicollis is a species of the family Monotomidae. Sometimes a storage pest. A beetle covered with parasitic mites.
RMHEWGCD–Hericium coralloides can be found as a solitary clump or in clustered clumps on dead hardwood logs and stumps, sometimes in huge patches that can be seen from quite some distance. It is recognized by its short (mostly about 1 cm long) spines, and the fact that the spines hang in rows along delicate branches. It is saprobic and possibly parasitic; growing alone or gregariously at summer and autumn. The fruiting body can be 8-30 cm in diameter, fleshy, white at first, light brown or yellowish with age, a few main branches arising from the narrow base, every main branch sending forth numerous
RFD9591M–Dryad's Saddle or sometimes call the 'Scaly Polypore' is a parasitic fungi that attaches to trees by a large thick stem
RF2JP58BK–Dryad’s Saddle, The largest capped mushroom in the UK starting early in the year and sometimes lasting until the end of Summer.
RMK1FB87–This micrograph reveals an unfertilized egg of the round worm Ascaris lumbricoides, Mag. 400X. Fertilized Ascaris lumbricoides eggs are rounded, have a thick shell. While unfertilized eggs are elongated and larger, thinner shelled, covered by a more visible mammillated layer, which is sometimes covered by protuberances, as in this case. Image courtesy CDC/Dr. Mae Melvin, 1982.
RF2B76X85–it is an image of a trichina parasitic worms, as sometimes found in the muscles of a person who has eaten pork not well cooked, showing three differen
RMAXX5HM–This large cinder cone sometimes known as a parasitic cone forms on the flank of the main volcano
RMRE3AXH–. Practical botany. Botany. THE BASIDIUM FUNGI (BASIDIOMYCETES) 255 life processes they are of the greatest importance, since they are instruments of decay and soil enrichment, and bear an im- portant relation to various industries. As producers of diseases of plants, animals, and men, they have great significance. Phycomycetes are sometimes saprophytic and sometimes parasitic. As saprophytes they are instruments of decay, and as parasites they often kill their hosts and then as saprophytes disorganize them. The simpler phycomycetes, as bread mold,. Fig. 213. Nest fungi growing in soil in whic
RMT9941C–Abstract of slotted bench covered in algae, Stratford-on-Avon, England, United Kingdom, Europe
RMPG2MJ7–. The potato . Potatoes. Diseases of the Potato 185 prevents it from completely carrying on its life processes and producing its fruit naturally. There are many agencies capable of bringing about disease of the potato, some of which are not well understood at present. Disease may be brought about by conditions of soil and climate unfavorable to the plant, by physiologi- cal disturbances within the plant, the direct cause of which is not clear, and by the attacks of parasitic or- ganisms. Troubles re- sulting from the first- named condition may sometimes be reme- died by selecting vari- eties o
![. „ ^i£a'o;ri^ii*«^if.- ^wiiS Ai' Figure 26. Non-parasitic leafspot. The John Williams Broadleaf type. Their presence is not considered a fault by tobacco handlers. On the con- trary, buyers like to see this development because it is a sign that the plant is the true John Williams type and that it is ripe tobacco. The other kind of Broadleaf spot has sometimes been called the "star and crescent spot" because it frequently has a small central portion partly surrounded, beyond an intervening band of green tissue, by a circular, Stock Photo](https://c8.alamy.com/comp/MCWXJC/iaoriiiif-wiis-ai-figure-26-non-parasitic-leafspot-the-john-williams-broadleaf-type-their-presence-is-not-considered-a-fault-by-tobacco-handlers-on-the-con-trary-buyers-like-to-see-this-development-because-it-is-a-sign-that-the-plant-is-the-true-john-williams-type-and-that-it-is-ripe-tobacco-the-other-kind-of-broadleaf-spot-has-sometimes-been-called-the-quotstar-and-crescent-spotquot-because-it-frequently-has-a-small-central-portion-partly-surrounded-beyond-an-intervening-band-of-green-tissue-by-a-circular-MCWXJC.jpg ". „ ^i£a'o;ri^ii*«^if.- ^wiiS Ai' Figure 26. Non-parasitic leafspot. The John Williams Broadleaf type. Their presence is not considered a fault by tobacco handlers. On the con- trary, buyers like to see this development because it is a sign that the plant is the true John Williams type and that it is ripe tobacco. The other kind of Broadleaf spot has sometimes been called the "star and crescent spot" because it frequently has a small central portion partly surrounded, beyond an intervening band of green tissue, by a circular, Stock Photo")
RMMCWXJC–. „ ^i£a'o;ri^ii*«^if.- ^wiiS Ai' Figure 26. Non-parasitic leafspot. The John Williams Broadleaf type. Their presence is not considered a fault by tobacco handlers. On the con- trary, buyers like to see this development because it is a sign that the plant is the true John Williams type and that it is ripe tobacco. The other kind of Broadleaf spot has sometimes been called the "star and crescent spot" because it frequently has a small central portion partly surrounded, beyond an intervening band of green tissue, by a circular,
![Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] 254 ELEMENTARY ENTOMOLOGY not over one twenty-fifth of an inch long, and the smallest not over one fifth that size. Most of them inhabit the eggs of insects, though some are secondary parasites ; that is, they are parasitic on larger parasites, and to this degree are sometimes injurious. FlG. 403. The fig insect (Blastophaga grossorum], whose introduction has made Smyrna fig culture possible in California. (Enlarged) a, adult female; ft, head of same from below ; c, from side ; d, male fertilizing fe Stock Photo](https://c8.alamy.com/comp/RWTAWK/elementary-entomology-c1912-elementary-entomology-elementaryentomo00sand-year-c1912-254-elementary-entomology-not-over-one-twenty-fifth-of-an-inch-long-and-the-smallest-not-over-one-fifth-that-size-most-of-them-inhabit-the-eggs-of-insects-though-some-are-secondary-parasites-that-is-they-are-parasitic-on-larger-parasites-and-to-this-degree-are-sometimes-injurious-flg-403-the-fig-insect-blastophaga-grossorum-whose-introduction-has-made-smyrna-fig-culture-possible-in-california-enlarged-a-adult-female-ft-head-of-same-from-below-c-from-side-d-male-fertilizing-fe-RWTAWK.jpg "Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] 254 ELEMENTARY ENTOMOLOGY not over one twenty-fifth of an inch long, and the smallest not over one fifth that size. Most of them inhabit the eggs of insects, though some are secondary parasites ; that is, they are parasitic on larger parasites, and to this degree are sometimes injurious. FlG. 403. The fig insect (Blastophaga grossorum], whose introduction has made Smyrna fig culture possible in California. (Enlarged) a, adult female; ft, head of same from below ; c, from side ; d, male fertilizing fe Stock Photo")
RMRWTAWK–Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] 254 ELEMENTARY ENTOMOLOGY not over one twenty-fifth of an inch long, and the smallest not over one fifth that size. Most of them inhabit the eggs of insects, though some are secondary parasites ; that is, they are parasitic on larger parasites, and to this degree are sometimes injurious. FlG. 403. The fig insect (Blastophaga grossorum], whose introduction has made Smyrna fig culture possible in California. (Enlarged) a, adult female; ft, head of same from below ; c, from side ; d, male fertilizing fe
RMR044NB–Chicken of the Woods fungi, Laetiporus sulphureus, sometimes called sulphur polypore, growing on a dead tree in woodlands in the New Forest. Hampshire
RMK1FB8B–This micrograph reveals a fertilized egg of the round worm Ascaris lumbricoides, Mag. 400X. Fertilized eggs are rounded, have a thick shell. While unfertilized eggs are elongated and larger, thinner shelled, covered by a more visible mammillated layer, which is sometimes covered by protuberances. Image courtesy CDC/Dr. Mae Melvin, 1982.
RMK1F86D–Magnified 1125X, this thn-film, Giemsa-stained photomicrograph revealed the presence of a growing Plasmodium ovale trophozoite, with a ?ring? nucleus. Plasmodium ovale rings have sturdy cytoplasm and large chromatin dots. Red blood cells (RBCs) are normal to slightly enlarged (1 1/4 *), may be round to oval, and are sometimes fimbriated. Schuffner's dots are visible under optimal conditions. Image courtesy CDC/Dr. Mae Melvin, 1973.
RMRH804J–. Botany of the living plant. Botany; Plants. SCHIZOPHYTA 451 parasitic, (ii) Metatrophic, those which cannot live unless they have organic substances at their disposal, both nitrogenous and carbonaceous. They occur in the open, and are saprogenic and sometimes parasitic (facultative parasites), (iii) Par atrophic, those which develop normally only within the living tissues of other organisms, and are true and obligatory parasites, such as the germs of Tubercle or Diphtheria. This classification may be extended, however, to all other organisms. All green autophytes are prototrophic in the same
RMK1FB7N–This trichrome-stained photomicrograph depicts a binucleated cyst of the amoebic parasite, Entamoeba histolytica . In bright-field microscopy, E. histolytica cysts are spherical and usually measure 12 to 15 {micro}m (range may be 10 to 20 {micro}m). A mature cyst has 4 nuclei, while an immature cyst may contain only 1 to 3 nuclei. Peripheral chromatin is fine, uniform, and evenly distributed. Elongated, chromatoid bodies with bluntly rounded ends may sometimes be found. Glycogen can be diffuse or absent in mature cysts while clumped in immature cysts. Image courtesy CDC/Dr. Mae Melvin, 1977.
RMT9940J–Abstract of slotted bench covered in algae, Stratford-on-Avon, England, United Kingdom, Europe
RMPFMKAP–. Cyclopedia of American horticulture : comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening; Horticulture; Horticulture; Horticulture. ^^ 1156. Tomato attacked by parasitic insects. other cruciferous plants are often devoured by hordes of hungry maggots. These underground root-feeding Insects are difficult pests to control, like any other unseen foe. Sometimes they can be successfully reached by injec
![. Fig. 2.—a tardigr.de, showing internal org.ns. in such a Manner as to bring its Food to it. But sometimes it will remain a long While in the Maggot Form and not shew its Wheels at all." Still another group of animals very wideh" distributed are the threadworms or Nem.^todes. Some of these live freely in the earth or water, but a great number of them are parasitic or live inside the bodies of other animals or plants. Amongst the parasites of the latter is the threadworm which causes the ear-cockles in corn. These cockles are brown or purple galls or tumours which replace the grain Stock Photo](https://c8.alamy.com/comp/MCTXT8/fig-2a-tardigrde-showing-internal-orgns-in-such-a-manner-as-to-bring-its-food-to-it-but-sometimes-it-will-remain-a-long-while-in-the-maggot-form-and-not-shew-its-wheels-at-allquot-still-another-group-of-animals-very-widehquot-distributed-are-the-threadworms-or-nemtodes-some-of-these-live-freely-in-the-earth-or-water-but-a-great-number-of-them-are-parasitic-or-live-inside-the-bodies-of-other-animals-or-plants-amongst-the-parasites-of-the-latter-is-the-threadworm-which-causes-the-ear-cockles-in-corn-these-cockles-are-brown-or-purple-galls-or-tumours-which-replace-the-grain-MCTXT8.jpg ". Fig. 2.—a tardigr.de, showing internal org.ns. in such a Manner as to bring its Food to it. But sometimes it will remain a long While in the Maggot Form and not shew its Wheels at all." Still another group of animals very wideh" distributed are the threadworms or Nem.^todes. Some of these live freely in the earth or water, but a great number of them are parasitic or live inside the bodies of other animals or plants. Amongst the parasites of the latter is the threadworm which causes the ear-cockles in corn. These cockles are brown or purple galls or tumours which replace the grain Stock Photo")
RMMCTXT8–. Fig. 2.—a tardigr.de, showing internal org.ns. in such a Manner as to bring its Food to it. But sometimes it will remain a long While in the Maggot Form and not shew its Wheels at all." Still another group of animals very wideh" distributed are the threadworms or Nem.^todes. Some of these live freely in the earth or water, but a great number of them are parasitic or live inside the bodies of other animals or plants. Amongst the parasites of the latter is the threadworm which causes the ear-cockles in corn. These cockles are brown or purple galls or tumours which replace the grain
RMR044GD–Chicken of the Woods fungi, Laetiporus sulphureus, sometimes called sulphur polypore, growing on a dead tree in woodlands in the New Forest. Hampshire
RMRDWC67–. The essentials of botany. Botany. BLACK MOLDS 189 and thereupon the egg secretes a thick double wall, and becomes a resting spore. 280. The resting spores remain in the tissues of the host until the latter decay, which is generally in the spring. Germination then takes place, in some species by the production of a tube (either germ-tube, or co- nidiophore), in others by the division of the protoplasm into zoospores whose subsequent development is like that described above in case of the conidia. 281. The Black Molds (Mucoraceae) are saprophytic and sometimes parasitic plants; they are compos
RMT993WH–Abstract of slotted bench covered in algae, Stratford-on-Avon, England, United Kingdom, Europe
RMPFN8GW–. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. claw, as in the spiders, at least the females, for in the males this palp is frequently the seat of a singular apparatus (e), hereafter to be described. Thirdly, of a sternal labiurn (f), which, as its name implies, is inserted into the sternum, and does not give origin to any arti- culated appendage or palp. With respect to the composition of the mouth in the parasitic species, such as most of the mites, and we may take as an example an argas, although it is concealed under the form of a beak, sometimes with a sharp poi
RMR044RW–Chicken of the Woods fungi, Laetiporus sulphureus, sometimes called sulphur polypore, growing on a dead tree in woodlands in the New Forest. Hampshire
RMRH8DFN–. Botany of the living plant. Botany. 452 BOTANY OF THE LIVING PLANT called a hymemum, exposed to the air, from which the spores are shed, as in the Mushrooms, Toadstools, and Shelf-Fungi (Figs. 386, 387). The mycelium may obtain nourishment in various ways. It is sometimes parasitic as in the Honey Agaric {Armillaria mellea), which penetrates the trunks of forest trees, ravaging the cambium, and killing them (see Fig. 340). Many of the Shelf-Fungi [Polyporus) grow parasi- tically at the expense of the heart-wood of trees, making them hollow. The infection comes through injury by wind, which e
RMT993XW–Abstract of slotted bench covered in algae, Stratford-on-Avon, England, United Kingdom, Europe
RMPFN8H3–. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. AIIACHN1DA. 203. claw, as in the spiders, at least the females, for in the males this palp is frequently the seat of a singular apparatus (e), hereafter to be described. Thirdly, of a sternal labiurn (f), which, as its name implies, is inserted into the sternum, and does not give origin to any arti- culated appendage or palp. With respect to the composition of the mouth in the parasitic species, such as most of the mites, and we may take as an example an argas, although it is concealed under the form of a beak, sometimes
RMR044E9–Chicken of the Woods fungi, Laetiporus sulphureus, sometimes called sulphur polypore, growing on a dead tree in woodlands in the New Forest. Hampshire
RMRDY5WK–. Botany of the living plant. Botany. 452 BOTANY OF THE LIVING PLANT called a hymeininn, exposed to the air, from which the spores are shed, as in the Mushrooms, Toadstools, and Shelf-Fungi (Figs. 386, 387). The mycelium may obtain nourishment in various ways. It is sometimes parasitic as in the Honey Agaric [Armillaria mellea), which penetrates the trunks of forest trees, ravaging the cambium, and killing them (see Fig. 340). Many of the Shelf-Fungi (Polyporus) grow parasi- tically at the expense of the heart-wood of trees, making them hollow. The infection comes through injury by wind, which
RMT993W3–Abstract of slotted bench covered in algae, Stratford-on-Avon, England, United Kingdom, Europe
RMPG1REJ–. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. THALLOPHYTA. 669 Peronosporece.—Are mostly parasitic upon Flowering Plants, and the cause of many destructive diseases. They estabhsh themselves by means of a branching, tubular, non-septate mycelium which penetrates the intercellular system of the host- plant (c/. p. 56). They propagate asexually by means of unicellular sporangia borne on branched hyphse which project from the stomates, &c., of the host (c/. fig. 38V); these sporangia (or spores as they are sometimes termed) liberate on a moist
RMR044JC–Chicken of the Woods fungi, Laetiporus sulphureus, sometimes called sulphur polypore, growing on a dead tree in woodlands in the New Forest. Hampshire
RMRDWA1M–. Textbook of botany. Botany. WEEDS AND POISONOUS PLANTS 329 thistle interferes with the harvestifig and handHng of a crop, and may greatly reduce its value. Thus a forage crop, such as hay, is much less valuable if it contains a large proportion of weeds that domestic animals will not eat or that, if eaten, may injure them. The presence of weed seeds in a crop of wheat or oats may greatly reduce the market value of the grain. Sometimes parasitic fungi or insects live on weeds and pass from the weeds to related useful plants. Some weeds are poisonous to man or to domestic animals; these will b
RMT993X9–Abstract of slotted bench covered in algae, Stratford-on-Avon, England, United Kingdom, Europe
RMPG3PF6–. A text-book of agricultural zoology. Zoology, Economic. 60 NEMATODE WORMS. moults precede the adult stage. The simplest form of develop- ment is where the embryo, enveloped still in its egg-membrane, is transported, passively, in the food to the host (Oxyuris). In the Asaaridce the embryo, which is provided with a boring tooth, may pass sometimes into an intermediate host, by which it is transported with its host in food and water into the second host, where it will become sexually mature. The food of Nematodes which are parasitic consists of the organic juices of the body. They nearly all s
RMRE0MTK–. A manual of botany. Botany. Fig. 1169. Flow6r of a species of Speedwell ( Veronica). Fig. 1170. Diagram of the flower of the Great Snapdragon {Antirrhinum masus), with one bract below. or whorled leaves; generally without, or very rarely with, stipules; sometimes parasitic on roots. Inflorescence axillary. Flowers anisomerous, irregular. Calyx inferior, persistent, 4—5-partite. Corolla more or less irregular, sometimes gibbous or spurred, 4—5-partite; (estivation imbricate. Stamens gene-. Please note that these images are extracted from scanned page images that may have been digitally enhanc
RMT9940W–Abstract of slotted bench covered in algae, Stratford-on-Avon, England, United Kingdom, Europe
RMPG42WY–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. PLASMOPARA. 129 the Vine. This parasite was introduced into Europe from America.^ It makes its appearance in early summer as white patches on the under surfaces of leaves, sometimes also on stalks and fruit. In the course of the summer the leaves show brown spots and dry up. The white patches consist of tufts of branched conidiophores, from which ovoid conidia are abjointed. These on germina-. FiG. 40.—Ptasmopara vi
RM2AG1T31–. The Journal of experimental zoology. castes. The researches of Grassi and Sandias have received a certainamount of confirmation from Brunelli (05), who finds that queensof Calotermes flavicollis and Termes lucifugus sometimes becomeinfested with the parasitic Protozoa, and that when this happensthe young oocytes in their ovaries degenerate. Calotermes queensare more susceptible to this form of castration then the queens ofTermes. Brunelli explains the winged soldier observed by Grassiand Silvestris (03) 48 workers of Microcerotermes struncki with Effects of Castration lu Insects 419 well-dev
RMT993Y6–Abstract of slotted bench covered in algae, Stratford-on-Avon, England, United Kingdom, Europe
RMPG3F5X–. A textbook of botany for colleges and universities ... Botany. go2 ECOLOGY evidence for either. The exact cause of petalization is unknown, but in many cases it appears to be inherent, double flowers usually being regarded as sports or mutants, since they often may be reproduced by seed as well as by cuttings.^ In other cases, petalization clearly is due to external factors, notably in a number of species in which plants whose roots are infested with certain parasitic fungi (as Heterodera radicicola) develop double flowers. Saponaria sometimes has double flowers when the roots are infested w
RM2AG6CRM–. Photographic atlas of the diseases of the skin a series of ninety-six plates, comprising nearly two hundred illustrations, with descriptive text, and a treatise on cutaneous therapeutics. hich are not hairy. It is always non-parasitic, and the diseasewhich is sometimes called sycosis parasitica is an entirely • distinctdisease, vi{., trichophytosis, or ringworm of the beard. In the accompanying illustration the limitation of the diseaseto a hairy part is well shown upon the cheek and chin. An unusualamount of scaling and crusting is seen in this case (the patienthaving gone several days with
RMT9942A–Abstract of slotted bench covered in algae, Stratford-on-Avon, England, United Kingdom, Europe
RMPG4B95–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. USTILAGO. 295 sisting of three or four cells with conidia, and sometimes secondary conidia. Coalescence of conidia may take place, and thereafter production of little mycelial threads. In nutritive solutions everything proceeds more luxuriantly, and conidia are produced in large numbers; they are easily detached and sprout. Fig. 161,Ustitago tragopogonis. Plants of Tragopogon in flower and fruit— 1, normal fruit; 2
RM2AKWP58–A text-book of veterinary obstetrics : including the diseases and accidents incidental to pregnancy, parturition and early age in the domesticated animals . in the cervicalregion, not unfrequently at the atlas, and sometimes as far as the facialregion ^Fig. 119). Among the double parasitic monstrosities, we may mention Saint-Hilaires Hcterotnplans, in which the smallest of the foetuses is attachedto the anterior part of the body of the other, at or near the umbilicus;the Hctcralians, in which the parasitic foetus is very incomplete, andperhaps reduced to a single region—as a head without a bod
RMT993YY–Abstract of slotted bench covered in algae, Stratford-on-Avon, England, United Kingdom, Europe
RMPG3TNA–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. COLLETOTRICHUM. 487 appear on the leaves, and depressions on the stem, sometimes extending so far round that the whole shoot dries up. The conidial patches are very much the same on the different hosts, and consist of short conidiophores from which oval, unicellular, hyaline conidia are abjointed. C. lycopersici Chest, is the cause of a spot-disease on the fruit of tomato in the United States. C. spinaciae Ell. et.
RM2AG1C6K–. British insects : a familiar description of the form, structure, habits, and transformations of insects. orked or branched;the mouth is very imperfect, if even at all adapted to thereception of food ; and the feet are without claws. The females never acquire wings, and never leave thebody of the bee or wasp in which they and the larvse,whether male or female, are parasitic, swarming sometimes(according to Mr. F. Smith) to the number of 200 or300. It appears, however, that their presence is not, asin the case of other insect parasites, actually fatal, livingbees and wasps being frequently obs
RMPFW0EJ–. Fresh-water biology. Freshwater biology. 482 FRESH-WATER BIOLOGY KEY TO NORTH AMERICAN FRESH-WATER NEMATODA 1 (64) Intestine normal and functional throughout; anus present in both sexes 2 The forms which are included here are typical nematodes. They possess an alimentary canal which is complete and functional during the entire life of the individual. They are free living in the adult as well as in the larval stage of existence. With the free-living forms are sometimes found parasitic forms so similar in structure that a knowledge of their source is needed to determine whether the species i
![Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 6. Sort/aria sp.; ascocarp in longitudinal sectionshowing asci, paraphyses and periphyses; X400. II] ASCOMYCETES 39 e-. hymenium. In Desmotascus1, a pyrenomycetous fungus parasitic on Bromelia,the paraphyses are replaced by a thin-walled pseudoparenchyma recallingthe arrangement in the higher Plectomycetes. The Peridium. The peridium or wall of the ascocarp is a weft of sterilehyphae in which the individualfilamcntsare sometimes clear-ly distinguished, sometimesclosely interwoven to form apseudoparenchyma; the wallsof the outer cells are so Stock Photo](https://c8.alamy.com/comp/2AN4P3M/fungi-ascomycetes-ustilaginales-uredinales-fig-6-sortaria-sp-ascocarp-in-longitudinal-sectionshowing-asci-paraphyses-and-periphyses-x400-ii-ascomycetes-39-e-hymenium-in-desmotascus1-a-pyrenomycetous-fungus-parasitic-on-bromeliathe-paraphyses-are-replaced-by-a-thin-walled-pseudoparenchyma-recallingthe-arrangement-in-the-higher-plectomycetes-the-peridium-the-peridium-or-wall-of-the-ascocarp-is-a-weft-of-sterilehyphae-in-which-the-individualfilamcntsare-sometimes-clear-ly-distinguished-sometimesclosely-interwoven-to-form-apseudoparenchyma-the-wallsof-the-outer-cells-are-so-2AN4P3M.jpg "Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 6. Sort/aria sp.; ascocarp in longitudinal sectionshowing asci, paraphyses and periphyses; X400. II] ASCOMYCETES 39 e-. hymenium. In Desmotascus1, a pyrenomycetous fungus parasitic on Bromelia,the paraphyses are replaced by a thin-walled pseudoparenchyma recallingthe arrangement in the higher Plectomycetes. The Peridium. The peridium or wall of the ascocarp is a weft of sterilehyphae in which the individualfilamcntsare sometimes clear-ly distinguished, sometimesclosely interwoven to form apseudoparenchyma; the wallsof the outer cells are so Stock Photo")
RM2AN4P3M–Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 6. Sort/aria sp.; ascocarp in longitudinal sectionshowing asci, paraphyses and periphyses; X400. II] ASCOMYCETES 39 e-. hymenium. In Desmotascus1, a pyrenomycetous fungus parasitic on Bromelia,the paraphyses are replaced by a thin-walled pseudoparenchyma recallingthe arrangement in the higher Plectomycetes. The Peridium. The peridium or wall of the ascocarp is a weft of sterilehyphae in which the individualfilamcntsare sometimes clear-ly distinguished, sometimesclosely interwoven to form apseudoparenchyma; the wallsof the outer cells are so
RMPG1W6W–. The natural history of plants. Botany. BALANOPHORA CEM. 505 !« aangumea.. Fig. 486. Male flower (5). species of Balanophora have been distinguished, found in the â warm regions of Asia and Oceania.^ Sarcophyte sanguinea,^ a red and fleshy plant, growing at the Cape, parasitic on the roots of Ekehergia and Acacia, would appear to have the same general organization as Balano- phora, but for its much flatter gynsecium and its ovary being sometim^^s uniovulate, sometimes bi- or triovulate. The male flower (fig. 486) is composed of three or four val- vate sepals and an equal number of super- pos
RM2AN52K2–Handbook of medical entomology . esemblemosquitoes in form and size but are usually more delicate, and thewing-veins, though sometimes hairy, are not fringed with scales.The venation is simpler than in the mosquitoes and the veins areusually less distinct. These midges, especially in spring or autumn, are often seen inimmense swarms arising like smoke over swamps and producing ahumming noise which can be heard for a considerable distance. At io8 Parasitic A rth ropoda these seasons they are frequently to be found upon the windows ofdwelHngs, where they are often mistaken for mosquitoes. The la
![. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. r "â ^ 1 c â¢" K'r 1156. Tomato worm attacked by parasitic insects, other cruciferous plants are often devoured by hordes of hungry maggots. These underground root-feeding Insects are difficult pests to control, like any other unseen foe. Sometimes they can be successfully reached by injecting a li Stock Photo](https://c8.alamy.com/comp/PFM20P/cyclopedia-of-american-horticulture-comprising-suggestions-for-cultivation-of-horticultural-plants-descriptions-of-the-species-of-fruits-vegetables-flowers-and-ornamental-plants-sold-in-the-united-states-and-canada-together-with-geographical-and-biographical-sketches-gardening-r-quot-1-c-quot-kr-1156-tomato-worm-attacked-by-parasitic-insects-other-cruciferous-plants-are-often-devoured-by-hordes-of-hungry-maggots-these-underground-root-feeding-insects-are-difficult-pests-to-control-like-any-other-unseen-foe-sometimes-they-can-be-successfully-reached-by-injecting-a-li-PFM20P.jpg ". Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. r "â ^ 1 c â¢" K'r 1156. Tomato worm attacked by parasitic insects, other cruciferous plants are often devoured by hordes of hungry maggots. These underground root-feeding Insects are difficult pests to control, like any other unseen foe. Sometimes they can be successfully reached by injecting a li Stock Photo")
RMPFM20P–. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. r "â ^ 1 c â¢" K'r 1156. Tomato worm attacked by parasitic insects, other cruciferous plants are often devoured by hordes of hungry maggots. These underground root-feeding Insects are difficult pests to control, like any other unseen foe. Sometimes they can be successfully reached by injecting a li
RM2AN7H1X–The British journal of dermatology . which are not known tobe parasitic, and which produce growths on potato which are limitedto the streaks. These growths are faint rose colour with an oily lustre,and are often surrounded by a whitish glistening zone, thus givingrise to a very different appearance from that produced by M. castellanii.Micrococcus ruher (Trommsdorff, 1904-), or, as it is sometimes named. OBSEUVATIONS ON TRICHOMYCOSIS AXILLARIS. 261 M. chromidrogemis ruber, which was isolated from a case of chromi-drosis, is characterised by the fact that it does not grow on potato ;its colourin
RMPG4B71–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 320 USTILAGINEAE. side of the leaf. The black spore-masses are formed iu the rind-parenchyma, and sometimes in the pith; they are set free by rupture of the epidermis. In autumn the symptoms are different. The plants appear normally developed, and have no coating of conidia; dark swollen spots, however, appear on the leaves and leaf-petioles, in consequence of the massing of black spore-baUs in the par- enchyma unde
RM2AN3670–Fungi, Ascomycetes, Ustilaginales, Uredinales . ter Lut-man. nuclei, as well as the greater part of the cytoplasm, pass into it, leaving theconjugating cells comparatively empty. In these varieties of U. Carbo Lutmanfound that, after conjugation, the two nuclei lie closely pressed together sothat it was sometimes impossible to differentiate them. Ustilago Tragopogonis pratensis is parasitic on Tragopogon pratensis, inthe flower heads of which it produces a mass of dark violet spores. In theyoung flower buds hyphae are abundant only in the anthers and ovary.Later they spread to the surface of t
RMPFWWYB–. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. 374 INSECTS INJURIOUS TO THE CRANBERRY. Fig. 3?6. bog. There are not usually more than two of these larvae on any one shoot, and often there is only one. The misehief done consists mainly in the killing of the extreme tip of the vine, which prevents the formation of a fruit- bud for the next year's growth, unless, as is sometimes the case, the vine by an extra effort puts them out at the side. Remedies,—There is a little Chalcis fly parasitic on this insect, which destroys it in large numbers. The m
RM2AG6XYE–. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. isexposed to view, ty the parasitic form, where in rare covered by an almost instances the f ungUS-growtll is COll-invisible membrane fined to the drum-head, at least atpieThgeadWshowhs perfect- first, and the mycelial threads pene- ly. The promontory is trate its tissue. Localized hyper-rough, and there is a red trophies are occasionally seen in certaranTture?ry0fUn the form °f ll0rny 0F Warty Out-growths, generally of elongatedform, but sometimes flat and sessi
RMPG0KEG–. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. CHAPTER XIII THE TAPEWORMS General Structure. â Even more peculiar and remarkable in their structure and life than the flukes are the tapeworms. A mature tape- worm is not an individual, but ,a whole family, consisting sometimes of many hundreds of individuals one behind the other like the links of a chain (Fig. 81). In some respects the tapeworms are more degener- ate than flukes, due to their in- variably parasitic life in the digestive tract of their hosts. Being continu- ally bathed in semi-digested
RM2AN867Y–Students' handbook to accompany Plants and their uses . e bark of trees, or even on their leaves, and get their water supply from dangling aerial roots which are covered with a layer of absorbent bark that catches water and then gradually gives it to the plant. 30. Parasitic roots. Certain plants, such as the dodders(fig. 34) and many kinds of mistletoe (figs. 23 and 35), livewholly or partly at the expense of other plants, into whichtheir sucking roots, or haustoria, penetrate, sometimes verydeeply. The mode of life of such parasites will be furtherdiscussed in Chapter IV. FIG. 23. Base of st
RMPG0P0W–. Animal parasites and parasitic diseases . Domestic animals; Veterinary medicine. PARASITOLOGY. 43 dust than one not lousy. The effect upon the older birds is not so severe as upon the younger ones, but it is shown in condition of flesh and low production of eggs. The irritation is sometimes so severe that hens desert their nests. Their combs may become dark. Birds unable to rest day or night become ema- ciated and die. To find the lice, part the feathers; the Hce will be found running over the skin or bases of the feathers. A favorite location for the lice is under the wings where the temper
RM2AJBEYJ–The natural history of plants, their forms, growth, reproduction, and distribution; . Fig. Zb.—Cuscuta Europcea parasitic on a Hop-stem.1 Natural size. 2 Section; x 40. plentiful dark green leaves, which are shunned and spared by grazing animals onaccount of their unpalatable stinging hairs, the parasite continues to grow withextraordinary rapidity, and puts forth a number of branches immediately abovethe lowest group of haustoria. All these again feel around with their tips, developtendiils and suckers, sometimes intertwining and becoming entangled together,-cover an ever-increasing area of t
RMPG4B03–. Botany for agricultural students . Botany. LICHENS 379 from a single cell, as in Yeast, to a massive mycelium which in some cases takes no definite shape while in others it forms a definitely shaped fruiting body. In parasitic forms the mycehum sometimes runs through the tissues of the hosts, and sometimes is chiefly superficial, sending only haustoria into the host.. Fig. 331. —Apple attacked by the Bitter Rot Fungus, Glomerella rufomaculans. After Alwood. The spores are of two kinds, conidiospores and ascospores. The conidiospores are borne free on projecting hyphae, and grow directly into
RM2AJ0X75–Outlines of zoology . ounded by afirm case. Eventually the cyst bursts, thespore-cases are liberated, and from withineach of these eight spores emerge to be-come cellular parasites. The adult of G.{Porospord) gigantea is sometimes three-quarters of an inch in length—enormous for a Protozoon. Fig. 46.—End-to-end unionof Gregarines.—After Fren-zel. Ninth Type 0/Frofozoa^CocciBiVM schubergi Coccidia are intracellular parasitic Sporozoa, attackingmainly the epithelial cells of the gut or associated organs.They are found chiefly in insects, myriopods, molluscs, andvertebrates. Coccidium schubergi i
RMPG1CX0–. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. 370 The Figs 2. SHORT-LEAVED FIG — Ficus brevifolia NuttaU This evergreen tree is rather rare in our area, occurring but sparingly in ham- mocks in peninsular Florida and the Keys, but is abundant in the Bahamas, and grows also in Cuba. It attains a maximum height of 15 meters, with a trunk diameter of 5 dm. Sometimes it is parasitic, like the foregoing tree, but usually its entire later career is terrestrial. It is also
![Live stock : a cyclopedia for the farmer and stock owner including the breeding, care, feeding and management of horses, cattle, swine, sheep and poultry with a special department on dairying : being also a complete stock doctor : with one thousand explanatory engravings . linseed oil,Mix. V. Ringworm.This is a fungous, vegetable parasitic growth, scientifically known astricophyton tonsurans. It is contagious, and attacks all classes of ani-mals, yet sometimes arises spontaneously from poverty and filth. It manifests itself by a round])ald spot, scaly and elevatedinside the ring, which is reda Stock Photo](https://c8.alamy.com/comp/2AX0F7C/live-stock-a-cyclopedia-for-the-farmer-and-stock-owner-including-the-breeding-care-feeding-and-management-of-horses-cattle-swine-sheep-and-poultry-with-a-special-department-on-dairying-being-also-a-complete-stock-doctor-with-one-thousand-explanatory-engravings-linseed-oilmix-v-ringwormthis-is-a-fungous-vegetable-parasitic-growth-scientifically-known-astricophyton-tonsurans-it-is-contagious-and-attacks-all-classes-of-ani-mals-yet-sometimes-arises-spontaneously-from-poverty-and-filth-it-manifests-itself-by-a-round-ald-spot-scaly-and-elevatedinside-the-ring-which-is-reda-2AX0F7C.jpg "Live stock : a cyclopedia for the farmer and stock owner including the breeding, care, feeding and management of horses, cattle, swine, sheep and poultry with a special department on dairying : being also a complete stock doctor : with one thousand explanatory engravings . linseed oil,Mix. V. Ringworm.This is a fungous, vegetable parasitic growth, scientifically known astricophyton tonsurans. It is contagious, and attacks all classes of ani-mals, yet sometimes arises spontaneously from poverty and filth. It manifests itself by a round])ald spot, scaly and elevatedinside the ring, which is reda Stock Photo")
RM2AX0F7C–Live stock : a cyclopedia for the farmer and stock owner including the breeding, care, feeding and management of horses, cattle, swine, sheep and poultry with a special department on dairying : being also a complete stock doctor : with one thousand explanatory engravings . linseed oil,Mix. V. Ringworm.This is a fungous, vegetable parasitic growth, scientifically known astricophyton tonsurans. It is contagious, and attacks all classes of ani-mals, yet sometimes arises spontaneously from poverty and filth. It manifests itself by a round])ald spot, scaly and elevatedinside the ring, which is reda
RMPG4GK8–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 153 B. polymorpha (Oed.) Wett.*-' *' is a common saprophyte on bark. It is said to sometimes become parasitic. Ascocarps black, stipitate; disk scarcely cupped, ranging up to 4 cm. in diameter although usually smaller. Caliciaceae (p. 134) Stroma more or less thalloid, with or without algal cells, often rudimentary and inconspicuous; ascoma more or less globoid, stipitate; the apex of the ascus dissolv- ing before the spores are matured, thus allowing the hyaline unripened spores to es- cape and
RM2AKHGFK–Insects injurious to fruits . of the female, muchenlarged). This gnat is found in almost every cranberry- 374 INSECTS INJURIOUS TO THE CRANBERRY. Fig. 386. bog. There are not usually more than two of these larvae onany one shoot, and often there is only one. The mischief doneconsists mainly in the killing of the extreme tip of the vine,which prevents the formation of a fruit-bud for the next years growth, unless, asis sometimes the case, the vine by anextra effort puts them out at the side. Remedies.—There is a little Chalcisfly parasitic on this insect, which destroysit in large numbers. The
RMPG2PEA–. Animal parasites and parasitic diseases . Domestic animals; Veterinary medicine. 166 PARASITOLOGY. Afiimals Infested.—The ox, sheep, pig, etc. Parts Infested—Liver, sometimes the lungs. The writer has noted one case of Hepatic Distomiasis in a pig; four specimens of the Distoma Americanus were found. Conditions Produced.—The larval fluke upon being taken into the stomach on grass is liberated by the dissolving of the gelatinous capsule enclosing it. It finds its way to the liver through the hepatic duct and finally becomes stationary in a small bile duct; or it may penetrate the duct and bec
RM2AJ5GNH–Fungous diseases of plants . SPORIUM: OTHER SPECIES Cladosporium Cucumerinum Ell. and Arth. This fungus, likemany other species of the genus, is occasionally parasitic. It occurs upon melons, producingsunken spots on the fruit,and sometimes on thestems. This trouble is ap-parent, as a rule, only dur-ing very moist weather,and under such circum-stances the conidial stageof the fungus is developedabundantly over the af-fected areas, which ap-pear olivaceous in color (Fig- 135). Cladosporium fulvumCke. Leaf mold of tomato. This fungus is commonduring moist weather, pro-ducing on tomatoes a leafbl
RMPFX98P–. A manual for the study of insects. Insects. Fig. 577.—Pipuji- cuius. The venation. V112-MX Fig. 578.—Wing of Pipunculus. the first branch of vein V approach each other at their tips. Vein V3 coalesces with vein VII, for nearly its entire length. Veins VII, and IX coalesce at their tips. Cells III and V are long. The flies hover in shady places. They are sometimes found on flowers, and may be swept from low plants; our most common species measure about one eighth of an inch in length, not including the wings. The larvae so far as known are parasitic upon bugs. * Bulletin of the U. S. National
RM2AJ519F–Fungous diseases of plants . nt. Bandi, W. Beitrage zur Biologic der Uredineen (Teil I). Hedwigia 42:118-136. 1903. The various species of Phragmidium are parasitic upon differentrosaceous hosts. No species of these rusts produces any veryserious disease of a cultivated variety ; nevertheless, considerationshould be given to a general study of one member of this genus.The fungus above indicated occurs commonly in moist regionsupon several wild roses. Spermogonia and aecidia (caeoma type)arc produced on the stems, petioles, leaf veins, etc., as orange-red pustules, sometimes inclosed by paraphy
RMPG4B97–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. USTILAGO. 289 Ust. secalis Eabenh. Eye-brand. This occurs but rarely, and destroys only the grain. Ust. panici-miliacei (Pers.) {Ust. destruens Duby). Smut of Millet. This smut occurs on the flowers of Panicum milia-. FlG. iM.—Uatilago hordei. Barley-smut on Sordeum distiehum. (v. Tubeuf phot.) ceum, P. chartaginiense and P. Crtis-galli in Italy, France, Germany, and North America. Sometimes it is very abundant and
RM2AN66GB–The royal natural history . rapidly, and aresaid to produce several families in the course of a summer; a pair having beenknown to lay nearly eight hundred eggs. Some species of Limax are capable oflowering themselves to the ground from the branch of a tree by secreting a slimythread. The largest species occuring in Britain is L. maxiinus, which has a verywide range on the Continent, and sometimes exceeds 6 inches in length. One mayoften notice numbers of a minute white parasitic mite (Philodromus) running about the body of this slug, and it is; - j V ; ? said also to live in the respira- t
RMPFW0EH–. Fresh-water biology. Freshwater biology. FREE-LIVING NEMATODES 483 r .9 8. 13 -61 '2,2 93 .8 1.8/—' 2^ 1.2 c- .9 Mr- 1.9 -M 2.' 93. ,6 (7) Esophagus with a distinct median bulb, and a more or less distinct posterior swelling. Males with bursa. Tylenchus Bastian. Genus consisting of numerous species, many of them parasitic in plants and sometimes highly injurious. Aquatic species are rather uncommon. A single species found parasitic in a marine alga. Principally owing to its economic importance the genus has a very extensive literature. Representative species. Tylenchus dipsaci Kiihn 1857.
![St Nicholas [serial] . THE SPIRALS ON THE TWIGS. dodder severed all connection with the groundby withering away or snapping off, and becamewholly a parasitic plant. a section of the bloom of the dodder. Sometimes a long twig will be completely entwined by the bloom, andthen, later in the season, by the seedboxes. SNAKES EAT YOUNG BIRDS Peterboro, N. H.Dear St. Nicholas: I went down to a little grove ofbirches and two pine-trees near our house. I found arobins nest in the smallest pine-tree about four feet fromthe ground. When I went down to it again, I found onlyone bird in the nest (there had Stock Photo](https://c8.alamy.com/comp/2AJCCBW/st-nicholas-serial-the-spirals-on-the-twigs-dodder-severed-all-connection-with-the-groundby-withering-away-or-snapping-off-and-becamewholly-a-parasitic-plant-a-section-of-the-bloom-of-the-dodder-sometimes-a-long-twig-will-be-completely-entwined-by-the-bloom-andthen-later-in-the-season-by-the-seedboxes-snakes-eat-young-birds-peterboro-n-hdear-st-nicholas-i-went-down-to-a-little-grove-ofbirches-and-two-pine-trees-near-our-house-i-found-arobins-nest-in-the-smallest-pine-tree-about-four-feet-fromthe-ground-when-i-went-down-to-it-again-i-found-onlyone-bird-in-the-nest-there-had-2AJCCBW.jpg "St Nicholas [serial] . THE SPIRALS ON THE TWIGS. dodder severed all connection with the groundby withering away or snapping off, and becamewholly a parasitic plant. a section of the bloom of the dodder. Sometimes a long twig will be completely entwined by the bloom, andthen, later in the season, by the seedboxes. SNAKES EAT YOUNG BIRDS Peterboro, N. H.Dear St. Nicholas: I went down to a little grove ofbirches and two pine-trees near our house. I found arobins nest in the smallest pine-tree about four feet fromthe ground. When I went down to it again, I found onlyone bird in the nest (there had Stock Photo")
RM2AJCCBW–St Nicholas [serial] . THE SPIRALS ON THE TWIGS. dodder severed all connection with the groundby withering away or snapping off, and becamewholly a parasitic plant. a section of the bloom of the dodder. Sometimes a long twig will be completely entwined by the bloom, andthen, later in the season, by the seedboxes. SNAKES EAT YOUNG BIRDS Peterboro, N. H.Dear St. Nicholas: I went down to a little grove ofbirches and two pine-trees near our house. I found arobins nest in the smallest pine-tree about four feet fromthe ground. When I went down to it again, I found onlyone bird in the nest (there had
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