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Control by fungicide treatment is essential at the seed-bed stage, with reduction of humidity and leaf wetness as fas as possible. Similarly, flowerhead brassicas grown under protected conditions may require fungicide sprays. In the field, control relies on the use of healthy seedlings, adequate crop
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species. It is most serious on the flowerhead types (cauliflower, broccoli), less serious on the leaf brassicas (cabbage, Brussels sprouts, and least serious on the root brassicas (turnips, swedes) and oil brassicas (rape). The pathogen persists as oospores in the soil. Attacks are most important in
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seedbeds, with infection appearing as yellow speckling of the upper surface of seedling leaves, and white mildew on the lower surface. Severely affected seedlings are stunted or killed. Similar symptoms appear on leaves in the field, causing premature senescence and favouring bacterial spoilage in
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the cold store after harvest. Affected
Brussels sprouts show black spotting, which reduces their market quality. The heads of flowerhead brassicas can be severely affected, and become unmarketable.
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rotation and avoidance of unfavourable conditions. Fungicide sprays are not very effective. However, fungicides may in any case be used against white rust (
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species. Other significant
Brassicaceous hosts are attacked by different species in the complex, e.g. horseradish (
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is now the name of the most important pathogen in this complex, attacking the major agricultural and horticultural
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Smith IM, Dunez J, Lelliott RA, Phillips DH, Archer SA, eds. (1988).
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360:. In the past, the cause of downy mildew in any plant in the family
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Downy mildew is a disease of major importance on the horticultural
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344:, is a plant pathogen. It causes downy mildew of species of
506:. European and Mediterranean Plant Protection Organization.
488:. European and Mediterranean Plant Protection Organization.
504:. EPPO Standards PP2 Good Plant Protection Practice, no. 8
486:. EPPO Standards PP2 Good Plant Protection Practice, no. 7
292:) Göker, Voglmayr, Riethm., Weiss & Oberw., 2003
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49:. Unsourced material may be challenged and removed.
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384:. From the perspective of plant pathology,
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109:Learn how and when to remove this message
715:Water mould plant pathogens and diseases
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431:), and these have some action against
364:was considered to be a single species
457:. Blackwell Scientific Publications.
356:and probably other genera within the
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687:8cdfd9e5-0433-4fd9-a01f-965e0948beca
47:adding citations to reliable sources
454:European Handbook of Plant Diseases
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16:Species of single-celled organism
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34:needs additional citations for
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398:Hyaloperonospora cochleariae
58:"Hyaloperonospora brassicae"
406:Hyaloperonospora cheiranthi
377:Hyaloperonospora parasitica
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544:Hyaloperonospora brassicae
386:Hyaloperonospora brassicae
337:Hyaloperonospora brassicae
282:Hyaloperonospora brassicae
143:Hyaloperonospora brassicae
127:Hyaloperonospora brassicae
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154:Scientific classification
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525:USDA ARS Fungal Database
720:Leaf vegetable diseases
382:Capsella bursa-pastoris
366:Peronospora parasitica
316:Peronospora parasitica
308:Peronospora brassicae
43:improve this article
484:Vegetable brassicas
394:Armoracia rusticana
499:OEPP/EPPO (1998).
481:OEPP/EPPO (1998).
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536:Taxon identifiers
464:978-0-632-01222-0
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264:H. brassicae
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99:December 2009
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54:Find sources:
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32:This article
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41:Please help
36:verification
33:
633:iNaturalist
704:Categories
439:References
69:newspapers
320:brassicae
258:Species:
171:Eukaryota
646:MycoBank
607:Fungorum
559:Q5952594
553:Wikidata
418:Brassica
413:Brassica
390:Brassica
350:Raphanus
346:Brassica
323:(Gäum.)
299:Synonyms
236:Family:
220:Oomycota
216:Phylum:
167:Domain:
625:3203931
586:1015459
354:Sinapis
318:subsp.
246:Genus:
226:Order:
147:cabbage
83:scholar
684:NZOR:
677:162125
651:488032
638:382590
612:488032
599:HPERBR
461:
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573:3MWV3
404:) by
396:) by
325:Maire
311:Gäum.
290:Gäum.
204:Clade
191:Clade
178:Clade
90:JSTOR
76:books
672:NCBI
620:GBIF
594:EPPO
502:Rape
459:ISBN
62:news
659:NBN
581:EoL
568:CoL
197:SAR
145:on
45:by
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473:^
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