Plasmopara halstedii(PLASHA)
Photos
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Field symptoms on a sunflower plant. Leaf chlorosis, stunting and upturned head
Courtesy: Hedvig Komjati
Leaf chlorosis on sunflower cotyledon leaves
Courtesy: Hedvig Komjati
White downy growth developed on the lower leaf surface
Courtesy: Fera (GB), Crown Copyright
Chlorotic areas on the upper leaf surface
Courtesy: Fera (GB), Crown Copyright
Sporulation on artificially inoculated sunflower cotyledon leaves
Courtesy: Hedvig Komjati
Sporulation at soil level on the stem of a sunflower seedling in a climatic chamber
Courtesy: Aranka Kormany
Sporangiophores with sporangia
Courtesy: Aranka Kormany
Sporangiophores with sporangia
Courtesy: Aranka Kormany
Sporangia and formation of zoospores in a sporangium
Courtesy: Aranka Kormany
Extensive downy mildew infection on sunflower (stunted plant growth)
Courtesy: Kostas Anastasopoulos (Department of Agriculture, I.H.U)
Visible downy mildew symptoms on sunflower leaf
Courtesy: Kostas Anastasopoulos (Department of Agriculture, I.H.U)
Young sunflower plants affected by downy mildew in the field, with fungal sporulation on the lower leaf surface
Courtesy: F. Viranyi, USDA (US).
Green and chlorotic mottling along the main veins on sunflower
Courtesy: SRPV, Ile de France (FR).
Young sunflower plants affected by downy mildew in the field, with fungal sporulation on the lower leaf surface
Courtesy: F. Viranyi, USDA (US).
Sunflower severely affected by downy mildew in the field, showing retarded growth, leaf chlorosis and horizontal head.
Courtesy: F. Viranyi, USDA (US).