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basil

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From: Esther Buchbinder
City:
Evanston, IL
I keep getting brown spots on the leaves. Does it need more water?

 
Extension Message
From: James Schmidt
Extension Specialist, Home Horticulture/4-H
Department of Crop Sciences
schmidt1@illinois.edu
Brown spots can be some type of disease. A serious disease affecting basil is basil downy mildew. The mildew develops on the lower surface. Eventually you get necrotic areas on the leaves. Plants will look chlorotic as if from nutrient deficiency. The leaves then fall off and the plant dies. If this is the case, destroy the plant. Brown spots are usually not a sign of a need for water. That usually results in wilting. Regardless of whether it is downy mildew, affected leaves can be picked off - don't use them.

 
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