Alternaria Leaf Blight (Cucurbits)


Alternaria Leaf Blight (Cucurbits)

Description: Appears in midseason on the oldest leaves and

spreads to younger leaves. Enlarging, circular brown

spots with rings form on the upper leaf surface and

are later covered by black, moldy growth. Defoliation

may result in sunscalding of fruit. The fungus is seed-borne

and overwinters in crop refuse and weeds.

Solution: If possible,

don’t plant where other cucurbits have been grown for

the last two years, at least. Avoid overhead watering.

Regular application of

Soap-Shield® Fungicidal Soap

will reduce infection and slow its spread.


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