Definition of downy mildew in English:

downy mildew

noun

  • [mass noun] Mildew on a plant which is marked by a whitish down composed of spore-forming hyphae, penetrating more deeply into the plant than powdery mildew.

    • ‘On cultivars highly susceptible to downy mildew and powdery mildew, some post harvest application may be required to protect foliage and prevent premature defoliation.’
    • ‘This is in contrast to most other grape pathogens, such as black rot and downy mildew, that require free water on the plant surface before the spores can germinate and infect.’
    • ‘Eastern growers must also contend with humidity-loving black rot, botrytis, downy mildew, and phomopsis.’
    • ‘Chocolate spot rust and downy mildew have all increased in winter beans during the last week.’
    • ‘While there is an absence of greenfly, it's a bad year for downy mildew in Ireland and my roses are also afflicted with black spot and rust, these three being the most serious diseases roses are prone to.’
    • ‘A site that provides for maximum air drainage which promotes faster drying of foliage can substantially reduce the risk of black rot and downy mildew.’
    • ‘However, if copper is applied for downy mildew control, it will provide some protection against powdery mildew.’
    • ‘Crazy top or downy mildew also was reported in a few fields in central Kansas.’
    • ‘Climatic conditions are conducive to the development of several major grape diseases, including: black rot, downy mildew and powdery mildew.’
    • ‘We've all seen rose leaves with black spot or downy mildew.’
    • ‘Roses are also likely to require the use of fungicidal sprays to rid them of diseases such as downy mildew.’
    • ‘Common onion diseases include damping off, botrytis leaf blight, downy mildew, and bacterial blight.’
    • ‘The more common ones are powdery mildew, blackspot, downy mildew and rust.’
    • ‘Both powdery mildew and downy mildew often infect squash plants as autumn nights grow cooler and dew keeps the foliage moist through the night.’
    • ‘Another kind of mildew, downy mildew, causes round, dark purple spots with yellow edges.’
    • ‘So it's very good news that scientists have found genetic markers that easily identify broccoli varieties with natural resistance to downy mildew.’
    • ‘Although we emphasize the use of fungicides for downy mildew control after bloom, early season fungicide applications appear to provide some level of control later in the season.’
    • ‘Before the accidental introduction of this disease, farmers spent considerable amounts to control another fungal disease, downy mildew.’
    • ‘They showed me some downy mildew in the two year-old vines, and explained that they were trying to decide whether or not to treat it with phosphorous acid.’