Angular Leaf Spot (Cucurbits)


Leaf Spot (Cucurbits)


Angular to irregular water-soaked spots form in the

leaves. When moist, droplets of bacteria ooze from the

underside of lesions and dry to a white residue. The

lesions later turn gray to brown, dry, and tear away,

leaving large irregular holes. The bacterium overwinters

in diseased plant refuse and on the seed coat. Disease

is spread by rain splash and on hands, clothing and


Solution: Avoid

working around cucurbits when foliage is wet. Bacterium

survival in the soil can be reduced if you work soil

only when it is dry. Do not water with overhead sprinklers.

Spray with Soap-Shield® Fungicidal Soap

before the disease normally appears. Once an epidemic

has taken hold, sprays are generally ineffective.


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