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optimum temperature of about 10–32°C (50–90 degrees F). The leaves are most susceptible 16–23 days after unfolding. High humidity favors the development of disease, but infection can occur at relative humidity as low a 50%. The conidia of the fungus are spread through the air and thus can travel over great distances. The mycelium can also overwinter in the buds of infected plants.
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uses haustoria to gain access to the leaf epidermal cells. The fungus is usually spread during the spring through mycelium from infected plant, or through ascocarps. Signs appear after 3–7 days of infection if conditions are favorable. The mycelium grows rapidly during the warm summer months with an
305:
Powdery mildew is manifest on the plant by white powdery fungal growth on the surface of the leaf, usually both sides of the leaf show fungal growth. The host tissue is frequently stunted, distorted, discolored, and scarred. The fruit of infected plants are usually smaller and the flavor is affected
330:
is with the use of fungicides. Usually sulphur or demethylation inhibitor fungicides are applied. Fungicides are usually applied once a week. Plants should also be kept physically separated to control spread because older plants can be a source of conidia. Fungicide application is not sufficient if
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Trigiano, R.N., Windham, M.T., Windham, A.S., 2008. Plant
Pathology: Concepts and Laboratory Exercises 2nd Edition. CRC Press.
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nutrition is insufficient, and added silicon may protect almost entirely without need for other methods.
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Webster, J., Weber, R.W.S., 2007. Introduction to Fungi 3rd
Edition. Cambridge University Press. 401–413
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Cheah, L.H., et al. 1996. Epidemiology of
Powdery Mildew (Sphaerotheca fuliginea) of Squash.
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43:
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are the two most commonly recorded fungi causing cucurbit powdery mildew. In the past,
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was considered to be the primary causal organism throughout most of the world. Today,
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98:
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17:
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Doubrava, N, et al. 2007. Cucumber, Squash, Melon & Other
Cucurbit Diseases.
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http://www.clemson.edu/extension/hgic/pests/plant_pests/veg_fruit/hgic2206.html
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http://vegetablemdonline.ppath.cornell.edu/factsheets/Cucurbits_PM.htm
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negatively, as fewer sugars and solids are stored in the fruit.
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Annual Review of Plant
Physiology and Plant Molecular Biology
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http://plant-disease.ippc.orst.edu/articles.cfm?article_id=30
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http://cuke.hort.ncsu.edu/cucurbit/wmelon/wmhndbk/wmpm.html
388:
Glawe, D.A., Grove, G.G., 2010. Powdery Mildew
Diseases.
504:
364:McGrath, M.T., 1997. Powdery Mildew of Cucurbits.
426:http://www.nzpps.org/journal/49/nzpp_491470.pdf
376:Tetteh, A, et al. Watermelon Crop Information.
326:The most common way to control the spread of
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167:(Schltdl.) U. Braun & S. Takam., (2000)
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206:(Fr.) Y.S. Paul & J.N. Kapoor, (1986)
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245:Sphaerotheca macularis var. fuliginea
231:Sphaerotheca fuliginea var. fuliginea
7:
675:8f6cbfb7-b39c-4a01-93d5-4a5efd1b9c26
446:Epstein, Emanuel (1999). "Silicon".
721:Fungal plant pathogens and diseases
224:Sphaerotheca fuliginea f. fuliginea
238:Sphaerotheca humuli var. fuliginea
25:
466:10.1146/annurev.arplant.50.1.641
55:
241:(Schltdl.) E.S. Salmon, (1900)
1:
248:(Schltdl.) W.B. Cooke, (1952)
227:(Schltdl.) Pollacci, (1911)
297:is more commonly reported.
234:(Schltdl.) Pollacci, (1911)
220:(Schltdl.) Pollacci, (1913)
757:
179:
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52:Scientific classification
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182:Acrosporium erysiphoides
736:Fungi described in 1832
189:Alphitomorpha fuliginea
291:Erysiphe cichoracearum
286:Erysiphe cichoracearum
217:Sphaerotheca fuliginea
199:(Schltdl.) Fr., (1829)
698:podosphaera-fuliginea
506:Podosphaera fuliginea
328:Podosphaera fuliginea
315:Podosphaera fuliginea
295:Podosphaera fuliginea
281:Podosphaera fuliginea
258:Podosphaera fuliginea
203:Euoidium erysiphoides
185:(Fr.) Subram., (1971)
161:Podosphaera fuliginea
36:Podosphaera fuliginea
264:Podosphaera xanthii
210:Oidium erysiphoides
18:Podosphaera xanthii
726:Vegetable diseases
301:Signs and symptoms
196:Erysiphe fuliginea
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683:Open Tree of Life
498:Taxon identifiers
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143:P. fuliginea
27:Species of fungus
16:(Redirected from
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269:plant pathogen
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119:Erysiphaceae
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731:Podosphaera
634:NatureServe
595:iNaturalist
460:: 641–664.
213:Fr., (1832)
130:Podosphaera
109:Erysiphales
715:Categories
339:References
89:Ascomycota
85:Division:
639:2.1157093
474:1040-2519
277:cucurbits
137:Species:
75:Kingdom:
69:Eukaryota
621:MycoBank
613:10686412
569:Fungorum
521:Q7576577
515:Wikidata
482:15012222
174:Synonyms
115:Family:
65:Domain:
587:5255357
333:silicon
322:Control
267:) is a
125:Genus:
105:Order:
95:Class:
688:932129
672:NZOR:
626:464561
600:360242
574:464561
561:SPHRFU
548:188286
480:
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695:PPE:
665:92473
608:IRMNG
535:4KRH4
456:(1).
79:Fungi
660:NCBI
582:GBIF
556:EPPO
478:PMID
470:ISSN
283:and
647:NBN
543:EoL
530:CoL
462:doi
275:on
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