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A section showing conidia of Powdery mildew in cucurbits caused by two fungus, Sphaerotheca fuliginea (syn. Podosphaera xanthii ) and Erysiphe cichoracearum (syn. Golovinomyces cichoracearum ) viewed under foldscope from ICAR-NOFRI, Sikkim.

Symptoms

1.Older lesions turn brown and appeared shriveled

2. Mycelium of fungus forms mats and appears as white, grayish white or tan colored patches on leaves, buds, stems or young fruit

3. Fruiting bodies (cleistothecia) appear as small black or brown specks on the mycelial mats

4. Infected leaves often appear chlorotic due to decreased photosynthesis

5. Leaf curl and leaf drop

6. Infected fruit and flowers are often aborted or malformed

7. Early signs include small chlorotic spots or blistering on leaves or flowers