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Peronospora Stock Photos and Images
RMMCTKHE–. Fig. 31. Mycelien mit Haustorien A von Cijstopus candi- dits; B von Peronospora calotheca (3Ü0/1). (Nach De Bary.)
RMB74HTT–Downy mildew Peronospora tabacina a serious disease affecting seedling tobacco in a seedbed
RMD2TG2F–Downy mildew, Peronospora viciae, early lesion on the upper surface of a field or fava bean leaf
RFM8H7TR–Grape Peronospora or downy mildew. Fungus vineyards. It causing grape diseases. It attacks the leaves, young wood, flowers and fruit.
RM2GEN5PJ–Randersacker, Germany. 19th Aug, 2021. Beate Leopold, managing director of Weinbauring Franken, shows the infestation of fungal spores of the so-called downy mildew (peronospora) on the leaf of a vine. The fungal disease is threatening the grapes in some vineyards in Franconia. After the many rains in spring and summer, the fungus is a widespread problem throughout Germany, but also in other European countries. Credit: Daniel Karmann/dpa/Alamy Live News
RM2EH6M3E–Downy mildew (Peronospora manshurica) disease lesions on on the upper surface of a soyabean leaf, Thailand
RM2K7P0RJ–Beautifully delicate Aquilegia flowering in a natural garden setting in close-up. natural environmental flower portrait
RM2EH6M3W–Downy mildew (Peronospora manshurica) disease lesions on on the upper surface of a soyabean leaf, Thailand
RMPG4ENN–. Diseases of economic plants . Plant diseases. 218 DISEASES OF ECONOMIC PLANTS promising resistant variety has been reported by Blinn.* Spraying as recommended for cucurbs is effective. Downy mildew (Peronospora cubensis B. & C). — This disease is described under cucumber. It is widespread and constitutes one of the most serious cantaloupe diseases.. Fig. 99. — Cantaloupe showing complete death of vines attacked by leaf blight. After Blinn. Wilt, fusariose (Fusarium vasinfedum Atk. var. nivea E. F. Smith).— Under watermelon this wilt is sufficiently discussed. It is not nearly so frequent
RMRCDPJ5–. Diseases of economic plants. Plant diseases. 218 DISEASES OF ECONOMIC PLANTS promising resistant variety has been reported by Blinn.1 Spraying as recommended for cucurbs is effective. Downy mildew (Peronospora cubensis B. & C).—This disease is described under cucumber. It is widespread and constitutes one of the most serious cantaloupe diseases.. Fig. 99. — Cantaloupe showing complete death of vines attacked by leaf blight. After Blinn. Wilt, fusariose (Fusarium vasinfectum Atk. var. nivea E. F. Smith). — Under watermelon this wilt is sufficiently discussed. It is not nearly so frequentl
RMW1D6AN–Archive image from page 91 of Die Krankheiten der Pflanzen; ein. Die Krankheiten der Pflanzen; ein Handbuch für Land- und Forstwirte, Gärtner, Gartenfreunde und Botaniker . diekrankheitend02fran Year: 1895 76 T. 9lb|(f)nitt: araritifrf)e ilje 3Iuf iffinbötter, »ap?, Sübkn, Äoljl, ScDtoie, (»olbiQLf unb Dielen onDeren Cntcifcren. ber Seite l)ernortritt. 'M bicfc ruppc unrb ooii inand)en neueren 8[)i)fologcn bic attnnc( Peronospora liefci)väntt, UHil)renb bann bie üor- l)ergelienben -Mcn mit bc|onbercn bafelbft angegebenen Ciattungonamen belegt aierben. A. XieCofporcn mit glattem ober I)öd)fte
RMMA73D5–. Elementary botany . Fig- i37. Branching hypha of Peronospora alsinearum. Fig. 138. Branched hypha of downy mildew of grape showing peculiar branching (Plasmopara viticola).
RFM8H7WC–Grape Peronospora or downy mildew. Fungus vineyards. It causing grape diseases. It attacks the leaves, young wood, flowers and fruit.
RM2GEN5NM–Randersacker, Germany. 19th Aug, 2021. Beate Leopold, managing director of Weinbauring Franken, shows the infestation of fungal spores of the so-called downy mildew (peronospora) on the leaf of a vine. The fungal disease is threatening the grapes in some vineyards in Franconia. After the many rains in spring and summer, the fungus is a widespread problem throughout Germany, but also in other European countries. Credit: Daniel Karmann/dpa/Alamy Live News
RM2K7P0RY–Beautifully delicate Aquilegia flowering in a natural garden setting in close-up. natural environmental flower portrait
RMPG3YY3–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PHYCOMYCETES 163 an acute stage. Older onions are apparently more susceptible than young, and recovery in the former case is seldom. The fungus. The mycelium is considerable, and it penetrates practically all parts of the leaf. The minute haustoria are numerous,. Fig. 57. Onion Mildew (Photograph by H. H. Whetzel) Fig. 58. Mature Conidiophore, Germinat- ing CONIDIUM, AND MYCELIUM OF ONION Peronospora. (c after Whetzel) thread-like, and often branched at the tip. The conidiophores a
RM2ANCGB1–A text-book of mycology and plant pathology . , 24 hours after germination of zoospores. 7, Achlyamonoica, with antheridia and oogonia; 8, Achlya conlorla. {After Henri Coupin,Atlas des Champignons Parasites et Pathogenes de VHomme el des Animaux, pi. xviii,1909.) spores which escape or by the protoplasm escaping (plasmatoparous), asin Peronospora densa, or by germ tubes, which in some species (Perono-spora lactuccB) appear at the end of the spore (acroblastic), or at theside of the conidiospore (pleuroblastic), as in Peronospora radii. Theoogonia and antheridia, which are also present, are fo
RMRYNR6A–Elementary botany (1898) Elementary botany . elementarybotany00atki Year: 1898 Fig- i37. Branching hypha of Peronospora alsinearum. Fig. 138. Branched hypha of downy mildew of grape showing peculiar branching (Plasmopara viticola).
RMME837A–. Die krankheiten der pflanzen, ein handbuch fur land-und forstwirte, gartner, gartenfreunde und botaniker . gig. 11. Peronospora yiticola, ein 23üfd)el üon (Soni= bienträgern, au§ einer Spaltöffnung ber 33latt= epiberniiä be§ Söeinftodes ^ernorgewad)fen, jum Seil nod) ©poren tragenb, 250fad) üergrolert. SRad) Sornu. unb Dertrodnen
RFM8H831–Grape Peronospora or downy mildew. Fungus vineyards. It causing grape diseases. It attacks the leaves, young wood, flowers and fruit.
RM2GEN5PF–Randersacker, Germany. 19th Aug, 2021. Beate Leopold, managing director of Weinbauring Franken, shows the infestation of fungal spores of the so-called downy mildew (peronospora) on the leaf of a vine. The fungal disease is threatening the grapes in some vineyards in Franconia. After the many rains in spring and summer, the fungus is a widespread problem throughout Germany, but also in other European countries. Credit: Daniel Karmann/dpa/Alamy Live News
RM2K7P0MP–Beautifully delicate Aquilegia flowering in a natural garden setting in close-up. natural environmental flower portrait
RMPG43T3–. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. 52 DISEASES OF CROPS. 22) is examined beneath the microscope,i t^g mycelium of the fungus will be seen ramifying among the cells of the leaf. Wherever the mycelium comes in contact with the cells of the host-plant, they become discoloured. This is. Fig. 22.—Potato FnNous (Peronospora infestans). A to B. Transverse section of potato leaf, showing my celiom (spawn) of fungnp. A. Lower surface Witt two stomata (C) and eonidiophores passing through them. D. Conidium (spore). E. Zoo
RM2AWN83F–Oidium or powdery mildew of the vine . to as Oidium in Europe. The disease known asMildew or Peronospora in Europe and the East is totally different andcaused by a fungus of very different character. In order to distinguishthe two, the Oidium is sometimes called Powdery Mildew and thePeronospora, Downy Mildew. As only one exists in California, theuse of the word Mildew should lead to no confusion, though perhaps itis best to adopt Oidium as the name of this disease. Symptoms and Effect on the Tine. The Oidium attacks all her-baceous parts of the vine,—leaves, canes, flowers, and fruit. In thes
RMT1HE46–Diseases of glasshouse plants (1923) Diseases of glasshouse plants diseasesofglassh1923bewl Year: 1923 110 DISEASES OF GLASSHOUSE PLANTS Downy Mildew of the Rose.—This disease, while common on glasshouse roses, is somewhat difficult to detect. Frequently young plants appear to lack vigour for no obvious reason, but a careful examination of the leaves reveals the presence of minute fungal filaments. The causal organism, Peronospora sparsa Berk., is capable Fig. 31. Powdery mildew of the rose : («) Diseased leaves, (6) summer spores, (c) a perithecium, (d) ascus containing eight ascosporcs.
RMMCK5P0–. Fio. 35.—Flower of Radish (Jio.phanas saticas) hypertruphied by Cystojuis cd.iididi's. The much-enlarged ovary stands out in the centre. The anthers are Ifaf-like ; the petals are much enlarged and hang downwards ; the sepals are somewhat enlarged. (Specimen from Botanical Museum of Erlangen, and photographed by Dr. Bnnis.) The couidial cushions form thick white stripes with a porcellaneous appearance, by which they are easily distinguislied from the cushions of Peronospora parasitica often present on the same plant.
RFM8H7RW–Grape Peronospora or downy mildew. Fungus vineyards. It causing grape diseases. It attacks the leaves, young wood, flowers and fruit.
RM2GEN5P5–Randersacker, Germany. 19th Aug, 2021. Beate Leopold, managing director of Weinbauring Franken, shows the infestation of fungal spores of the so-called downy mildew (peronospora) on grapes of a vine. The fungal disease is threatening the grapes in some vineyards in Franconia. After the many rains in spring and summer, the fungus is a widespread problem throughout Germany, but also in other European countries. Credit: Daniel Karmann/dpa/Alamy Live News
RM2K7P0MN–Beautifully delicate Aquilegia flowering in a natural garden setting in close-up. natural environmental flower portrait
RM2HGAJ1C–Beautifully delicate Aquilegia flowering in a natural garden setting in close-up. natural environmental flower portrait
RMPG42WD–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 134 PHYCOMYCETES. and branched conidiophores with light-brown conidia arise from their underside. Numerous oospores may be found in the leaves. Kirchner ^ observed the disease on leaves of four-year-old plants, yet without injurious effects. The follovnng are other British or American species: Peronospora ficariae, Tul. On Ranunculus, Myosunis, etc. P. corydalis, De By. On Corydalis and Dicentra. P. violae, De By. O
RM2AXJCX6–Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . FUNGI AFFECTING THE ONION more or less. The Onion Mildew Peronospora schleideniana This disease appears upon the tops of onions as agrayish, moldlike, velvety coating, which is followed by ilting of the affected leaves (Fig. 65).Seed onions seem to be the most liableto injury, and crops grown on low, dampground, are more subject to attack thanthose in higher, drier situations. Thefungus has been known in Europe as aserious enemy, for many years, but hasonly
RMT03RN5–Elementary botany . elementarybotany00atki Year: 1898 MORPHOLOGY. size of the female nucleus before the fusion of the two takes place. In figs. 306 and 307 are shown the entering pollen tube with the sperm nucleus, and the fusion of the male and female nuclei. 457. Fertilization in plants is fundamentally the same as in animals.—In all the great groups of plants as represented by spirogyra, oedogonium, vaucheria, peronospora, ferns, gymno- Fig. 304, Two- ami four-celled stage of embryo-sac of lilium. The middle one shows di ision nuclei to form the four-celled stage. (.Easter lily.) sperm
RMMCMGJP–. Fig. 24.—Peronospora SchUidcni. i. a conidiophore that has emerged through a stoma of an onion leaf; 2, free conidia ; 3, oospore or resting-sporc. All highly mng. almost entirely on weather conditions; when the disease is already present a few bright, dry days will cause its almost entire disappearance, the onions will again begin to grow, and will be but little the worse for the check. On the other hand, a continuance of damp, dull weather proves disastrous.
RFM8H7P8–Grape Peronospora or downy mildew. Fungus vineyards. It causing grape diseases. It attacks the leaves, young wood, flowers and fruit.
RM2GEN5PD–Randersacker, Germany. 19th Aug, 2021. Beate Leopold, managing director of Weinbauring Franken, shows the infestation of fungal spores of the so-called downy mildew (peronospora) on grapes of a vine. The fungal disease is threatening the grapes in some vineyards in Franconia. After the many rains in spring and summer, the fungus is a widespread problem throughout Germany, but also in other European countries. Credit: Daniel Karmann/dpa/Alamy Live News
RM2HGAJ67–Beautifully delicate Aquilegia flowering in a natural garden setting in close-up. natural environmental flower portrait
![. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. MISCELLANEOUS CROPS. 157 The larvsB of this moth (already described) feed on the roots of lettuces. The Lettuce Mildew {Peronospora ganglioniformis, Fig. 51) produces pallid patches on lettuce leaves, and " in bad cases summer lettuces are quickly reduced to pu- trescent masses." The conidiophores of this fungus are. Fig. 51.—Lettuce Mildew [Peronospora ganglioniformis). A. A conidiophore and conidia. B. Oospores (reeting-spores). X 195 diam. (Zeiss's C. and 3 CO.). f Stock Photo](https://c8.alamy.com/comp/PG43KR/the-diseases-of-crops-and-their-remedies-a-handbook-of-economic-biology-for-farmers-and-students-plant-diseases-miscellaneous-crops-157-the-larvsb-of-this-moth-already-described-feed-on-the-roots-of-lettuces-the-lettuce-mildew-peronospora-ganglioniformis-fig-51-produces-pallid-patches-on-lettuce-leaves-and-quot-in-bad-cases-summer-lettuces-are-quickly-reduced-to-pu-trescent-massesquot-the-conidiophores-of-this-fungus-are-fig-51lettuce-mildew-peronospora-ganglioniformis-a-a-conidiophore-and-conidia-b-oospores-reeting-spores-x-195-diam-zeisss-c-and-3-co-f-PG43KR.jpg ". The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. MISCELLANEOUS CROPS. 157 The larvsB of this moth (already described) feed on the roots of lettuces. The Lettuce Mildew {Peronospora ganglioniformis, Fig. 51) produces pallid patches on lettuce leaves, and " in bad cases summer lettuces are quickly reduced to pu- trescent masses." The conidiophores of this fungus are. Fig. 51.—Lettuce Mildew [Peronospora ganglioniformis). A. A conidiophore and conidia. B. Oospores (reeting-spores). X 195 diam. (Zeiss's C. and 3 CO.). f Stock Photo")
RMPG43KR–. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. MISCELLANEOUS CROPS. 157 The larvsB of this moth (already described) feed on the roots of lettuces. The Lettuce Mildew {Peronospora ganglioniformis, Fig. 51) produces pallid patches on lettuce leaves, and " in bad cases summer lettuces are quickly reduced to pu- trescent masses." The conidiophores of this fungus are. Fig. 51.—Lettuce Mildew [Peronospora ganglioniformis). A. A conidiophore and conidia. B. Oospores (reeting-spores). X 195 diam. (Zeiss's C. and 3 CO.). f
RM2AJ69JN–Fungous diseases of plants . iting tips are lessrigid and more widelyseparated one fromanother, correspondingmore nearly to separatebranches. The sporesor zoosporangia areslightly violet tinted inmass and generallyovate in outline. Thegermination of the sporehas been followed care-fully and is known totake place by means ofthe characteristic motilezoospores. Clintonalone has illustrated thevarious stages of germi-nation (Fig, 54, r and d).Fig. 55. Peronospora on Young Cabbage Leaf Occasionally the normal sporophores are accompanied by short, swollen hyphse (Fig. 56, b),which may also bear spor
RMT1HYNF–Diseases of crop-plants in the Diseases of crop-plants in the Lesser Antilles diseasesofcroppl00nowe Year: 1923 332 DISEASES OF CROP-PLANTS A Jamaica disease resembling this in most particulars was attributed by G. Massee in 1887 to a fungus named by him Peronospora trichotoma. Control. Certain varieties are immune to the disease and may be safely grown on infested land. Susceptible varieties should only be planted on clean land, and care must be taken not to introduce infection with the planting material or with instruments used in cultivation. Fig. 139 Vasculomyces Xanthosomae Bull. 6,
![. FiGUBE 5. The causa] fungus, Peronospora tabacina. A. A single spoorphore showing young summer spores in several stages of development. Most of the spores have already fallen off the tips of the branches. B. Mature summer spores (sporangia or conidia). C. Germination of the summer spores in var- ious stages from one to fom- hours in a drop of water. D. An oospore (winter spore) from the interior of a dead leaf. (Magnified, 400 times natural size.) Stock Photo](https://c8.alamy.com/comp/MCK3RT/figube-5-the-causa-fungus-peronospora-tabacina-a-a-single-spoorphore-showing-young-summer-spores-in-several-stages-of-development-most-of-the-spores-have-already-fallen-off-the-tips-of-the-branches-b-mature-summer-spores-sporangia-or-conidia-c-germination-of-the-summer-spores-in-var-ious-stages-from-one-to-fom-hours-in-a-drop-of-water-d-an-oospore-winter-spore-from-the-interior-of-a-dead-leaf-magnified-400-times-natural-size-MCK3RT.jpg ". FiGUBE 5. The causa] fungus, Peronospora tabacina. A. A single spoorphore showing young summer spores in several stages of development. Most of the spores have already fallen off the tips of the branches. B. Mature summer spores (sporangia or conidia). C. Germination of the summer spores in var- ious stages from one to fom- hours in a drop of water. D. An oospore (winter spore) from the interior of a dead leaf. (Magnified, 400 times natural size.) Stock Photo")
RMMCK3RT–. FiGUBE 5. The causa] fungus, Peronospora tabacina. A. A single spoorphore showing young summer spores in several stages of development. Most of the spores have already fallen off the tips of the branches. B. Mature summer spores (sporangia or conidia). C. Germination of the summer spores in var- ious stages from one to fom- hours in a drop of water. D. An oospore (winter spore) from the interior of a dead leaf. (Magnified, 400 times natural size.)
RFM8H848–Grape Peronospora or downy mildew. Fungus vineyards. It causing grape diseases. It attacks the leaves, young wood, flowers and fruit.
RM2GEN5PK–Randersacker, Germany. 19th Aug, 2021. Beate Leopold, managing director of Weinbauring Franken, shows the infestation of fungal spores of the so-called downy mildew (peronospora) on the leaf of a vine. The fungal disease is threatening the grapes in some vineyards in Franconia. After the many rains in spring and summer, the fungus is a widespread problem throughout Germany, but also in other European countries. Credit: Daniel Karmann/dpa/Alamy Live News
RM2HGAJ19–Beautifully delicate Aquilegia flowering in a natural garden setting in close-up. natural environmental flower portrait
RM2AGBDCB–. Annual report of the North Carolina Agricultural Experiment Station. 74 THIRTY-FIRST ANNUAL REPORT, 190S. CUCUMBER.Downy Mildew (Peronospora Cubensis B. <fc C).—The downymildew, which has proved so destructive to cucumbers in other States,in South Carolina so injurious as to almost destroy the cucumber in-dustry in certain sections, has begun to make its appearance abund-antly in North Carolina. Specimens were collected this summer inWake, Wayne, Cabarrus and Alamance counties. This disease isrecognized by the yellowish angular spots as shown from the upperside of the leaf. The spots enla
RMPG0RG4–. Fungoid and insect pests of the farm. Agricultural pests. 34 Potato Disease and Allied Diseases [ch. disease from one season to another. The fungus does not attack the bulbs but prevents the leaves from carrying on their normal functions of manufacturing food stuff and so the bulbs are smaller.. Fig. 11. Conidiophore and conidia of Peronospora schUideni which causee onion mildew. (Magnified.) (After Massee.) Remedial Measures. Well-drained land does not suffer so much as wet land. Onions should not be planted on land which had a diseased crop of onions in the previous season.. Please note th
RMT1HF23–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 PERONOSPORA. 133 oospore-coat (oospores of P. viciae have a coat with a regular net- work). It occurs on stems, leaves, and petioles of clovers, lucerne and other Papilionaceae, often with disastrous effect. P. sparsa, Berk. (Britain and U.S. America). This parasite on the rose was first observed in England. It injures indoor roses, causing a fall of the leaf, preceded by the appearance of lilac-colou
RMMA739X–. Elementary botany . ?-=*••: mi i I! * Fig. 14.S • Fertilization in Peronospora alsinearum ; tube from antheridium carrying in the sperm nucleus in figure at the left, female nucleus near; fusion of the two nuclei shown in the two other figures. (After Berlese.) are not developed here, but a nucleus in the antheridium reaches the v^ir cell. It sinks in the protoplasm of the egg, comes in contact with tla- nu- cleus of the egg, and fuses with it. Thus fertilization is accomplished.
RFM8H7X5–Grape Peronospora or downy mildew. Fungus vineyards. It causing grape diseases. It attacks the leaves, young wood, flowers and fruit.
RM2GEN5NF–Randersacker, Germany. 19th Aug, 2021. Beate Leopold, managing director of Weinbauring Franken, shows the infestation of fungal spores of the so-called downy mildew (peronospora) on leaves of a vine. The fungal disease is threatening the grapes in some vineyards in Franconia. After the many rains in spring and summer, the fungus is a widespread problem throughout Germany, but also in other European countries. Credit: Daniel Karmann/dpa/Alamy Live News
RM2HGAJ85–Beautifully delicate Aquilegia flowering in a natural garden setting in close-up. natural environmental flower portrait
RM2AG9XJ1–. The Gardeners' chronicle : a weekly illustrated journal of horticulture and allied subjects. ices, spring-ing by their bases from a black spot; compacted mycelium,spores abundant, cylindrical, black, i—3 septate, slightlypointed at their extremities ; 10—30 nik. long, by 8—10mk. wide. Macro-conidia : Macrosporium lycopcysici.Yozz,well developed, black, septate, somewhat flexuous, pro- ^Si^ Fig. 123.—PHOMA DESTRUCTIVA. PERITltEClUM ANDSPORES HIGHLY MAGNIFIED. presence of Peronospora infestans. The fungus wasnot producing its conidiiphores very abundantly, butstill there it was without doub
![. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. ROOT CROPS. 47 and sand to be put on the ground before sowing the seeds. The odour of the tar is so offensive to insects that they cannot endure soil impregnated with it. (2) Burn all in- fested leaves. Cure.âDressing the land with gas-lime, soot, and lime, destroys the piipse of this pest. The Parsnip Fly {Psila rosce) has already been described in this chapter (see " Carrot Ply ").. Fig. 19.âMildew of Paesnips {Peronospora nivea). A. A spotted parsnip. B. Conidiopho Stock Photo](https://c8.alamy.com/comp/PG43TB/the-diseases-of-crops-and-their-remedies-a-handbook-of-economic-biology-for-farmers-and-students-plant-diseases-root-crops-47-and-sand-to-be-put-on-the-ground-before-sowing-the-seeds-the-odour-of-the-tar-is-so-offensive-to-insects-that-they-cannot-endure-soil-impregnated-with-it-2-burn-all-in-fested-leaves-curedressing-the-land-with-gas-lime-soot-and-lime-destroys-the-piipse-of-this-pest-the-parsnip-fly-psila-rosce-has-already-been-described-in-this-chapter-see-quot-carrot-ply-quot-fig-19mildew-of-paesnips-peronospora-nivea-a-a-spotted-parsnip-b-conidiopho-PG43TB.jpg ". The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. ROOT CROPS. 47 and sand to be put on the ground before sowing the seeds. The odour of the tar is so offensive to insects that they cannot endure soil impregnated with it. (2) Burn all in- fested leaves. Cure.âDressing the land with gas-lime, soot, and lime, destroys the piipse of this pest. The Parsnip Fly {Psila rosce) has already been described in this chapter (see " Carrot Ply ").. Fig. 19.âMildew of Paesnips {Peronospora nivea). A. A spotted parsnip. B. Conidiopho Stock Photo")
RMPG43TB–. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. ROOT CROPS. 47 and sand to be put on the ground before sowing the seeds. The odour of the tar is so offensive to insects that they cannot endure soil impregnated with it. (2) Burn all in- fested leaves. Cure.âDressing the land with gas-lime, soot, and lime, destroys the piipse of this pest. The Parsnip Fly {Psila rosce) has already been described in this chapter (see " Carrot Ply ").. Fig. 19.âMildew of Paesnips {Peronospora nivea). A. A spotted parsnip. B. Conidiopho
RMT1KCXK–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 134 PHYCOMYCKTES. and branched conidiophores with light-brown conidia arise from their underside. Numerous oospores may be found in the leaves. Kirchner observed the disease on leaves of four-year-old plants, yet without injurious effects. The following are other British or American species: Peronospora ficariae, Tiil. On Ranunculus, Myommis, etc. P. corydalis, De By. On Corydalis and Dicentra. P. vi
![. Figure 32. Distribution of fusarium wilt of tobacco in Kentucky. (After map by Valleau, Johnson and Diachun.)- Peronospora tabacina, dovmy mildev. In Massachusetts downj'" mildew V7as the outstanding tobacco disease. This year it made Its first appearance in the Connecticut Valley tobacco of both Connecticut and Massachusetts (PDR 21: 235, 286-287, 384); in Connecticut the disease made Its appearance for the first time in the seed beds (PDR 21: 2l8); Pennsylvania, trace; much more prevalent than last year in Maryland owing to the cool period and the abundance of moisture.in the plant b Stock Photo](https://c8.alamy.com/comp/MCK55F/figure-32-distribution-of-fusarium-wilt-of-tobacco-in-kentucky-after-map-by-valleau-johnson-and-diachun-peronospora-tabacina-dovmy-mildev-in-massachusetts-downjquot-mildew-v7as-the-outstanding-tobacco-disease-this-year-it-made-its-first-appearance-in-the-connecticut-valley-tobacco-of-both-connecticut-and-massachusetts-pdr-21-235-286-287-384-in-connecticut-the-disease-made-its-appearance-for-the-first-time-in-the-seed-beds-pdr-21-2l8-pennsylvania-trace-much-more-prevalent-than-last-year-in-maryland-owing-to-the-cool-period-and-the-abundance-of-moisturein-the-plant-b-MCK55F.jpg ". Figure 32. Distribution of fusarium wilt of tobacco in Kentucky. (After map by Valleau, Johnson and Diachun.)- Peronospora tabacina, dovmy mildev. In Massachusetts downj'" mildew V7as the outstanding tobacco disease. This year it made Its first appearance in the Connecticut Valley tobacco of both Connecticut and Massachusetts (PDR 21: 235, 286-287, 384); in Connecticut the disease made Its appearance for the first time in the seed beds (PDR 21: 2l8); Pennsylvania, trace; much more prevalent than last year in Maryland owing to the cool period and the abundance of moisture.in the plant b Stock Photo")
RMMCK55F–. Figure 32. Distribution of fusarium wilt of tobacco in Kentucky. (After map by Valleau, Johnson and Diachun.)- Peronospora tabacina, dovmy mildev. In Massachusetts downj'" mildew V7as the outstanding tobacco disease. This year it made Its first appearance in the Connecticut Valley tobacco of both Connecticut and Massachusetts (PDR 21: 235, 286-287, 384); in Connecticut the disease made Its appearance for the first time in the seed beds (PDR 21: 2l8); Pennsylvania, trace; much more prevalent than last year in Maryland owing to the cool period and the abundance of moisture.in the plant b
RFM8H7MD–Grape Peronospora or downy mildew. Fungus vineyards. It causing grape diseases. It attacks the leaves, young wood, flowers and fruit.
RM2GEN5P7–Randersacker, Germany. 19th Aug, 2021. Beate Leopold, managing director of Weinbauring Franken, shows the infestation of fungal spores of the so-called downy mildew (peronospora) on leaves of a vine. The fungal disease is threatening the grapes in some vineyards in Franconia. After the many rains in spring and summer, the fungus is a widespread problem throughout Germany, but also in other European countries. Credit: Daniel Karmann/dpa/Alamy Live News
RM2HGAJ6T–Beautifully delicate Aquilegia flowering in a natural garden setting in close-up. natural environmental flower portrait
RM2AGBAN3–. Annual report of the North Carolina Agricultural Experiment Station. with the Bordeaux mixture. VETCH- Downy Mildew (Peronospora vicio? (B.), DeBy.).—This dis-ease appeared upon cultivated vetch in Wake county this springand did a great deal of damage. The plants affected did not de-velop normally, were much smaller, weaker and paler than the neigh-boring ones. Upon close examination the under side of the leaveswas found to be covered with the fine down of Peronospora, WATERMELON. Wilt (Neocosmospora vasinfecta var nivea Erw. Smith).—In-quiries concerning this were received from Vance county
![. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 95 them the pumpkin, squash, cucumber, muskmelon, watermelon, gourd, in fact according to the work of Selby '"^ any cucurbit ap- pears hable to attack. Clinton infected muskmelons with spores produced on cucumber. The fungus is especially prevalent on cucumbers raised under glass. Bremia Regel (p. 84) As in Peronospora except that just below the ends of the conidio- phore branches there are pronounced swellings from which spring radially a number of short branches each bearing an ovate, papi Stock Photo](https://c8.alamy.com/comp/PG4GY5/the-fungi-which-cause-plant-disease-plant-diseases-fungi-the-fungi-which-cause-plant-disease-95-them-the-pumpkin-squash-cucumber-muskmelon-watermelon-gourd-in-fact-according-to-the-work-of-selby-quot-any-cucurbit-ap-pears-hable-to-attack-clinton-infected-muskmelons-with-spores-produced-on-cucumber-the-fungus-is-especially-prevalent-on-cucumbers-raised-under-glass-bremia-regel-p-84-as-in-peronospora-except-that-just-below-the-ends-of-the-conidio-phore-branches-there-are-pronounced-swellings-from-which-spring-radially-a-number-of-short-branches-each-bearing-an-ovate-papi-PG4GY5.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 95 them the pumpkin, squash, cucumber, muskmelon, watermelon, gourd, in fact according to the work of Selby '"^ any cucurbit ap- pears hable to attack. Clinton infected muskmelons with spores produced on cucumber. The fungus is especially prevalent on cucumbers raised under glass. Bremia Regel (p. 84) As in Peronospora except that just below the ends of the conidio- phore branches there are pronounced swellings from which spring radially a number of short branches each bearing an ovate, papi Stock Photo")
RMPG4GY5–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 95 them the pumpkin, squash, cucumber, muskmelon, watermelon, gourd, in fact according to the work of Selby '"^ any cucurbit ap- pears hable to attack. Clinton infected muskmelons with spores produced on cucumber. The fungus is especially prevalent on cucumbers raised under glass. Bremia Regel (p. 84) As in Peronospora except that just below the ends of the conidio- phore branches there are pronounced swellings from which spring radially a number of short branches each bearing an ovate, papi
RMT1HF46–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 134 PHYCOMYCKTES. and branched conidiophores with light-brown conidia arise from their underside. Numerous oospores may be found in the leaves. Kirchner observed the disease on leaves of four-year-old plants, yet without injurious effects. The following are other British or American species: Peronospora ficariae, Tiil. On Ranunculus, Myommis, etc. P. corydalis, De By. On Corydalis and Dicentra. P. vi
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