Target Leaf Spot

Corynespora cassiicola

image of target leaf spot damageimage of target leaf spot

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A severe leaf spot most common on cucumbers. Small yellow spots on leaf lamina develop into necrotic areas that eventually fall out leaving the leaf with a “shot-hole” appearance. Severe cases result in defoliation. Infected fruit are darkened and shriveled.

In tropical and subtropical areas where this disease occurs, good greenhouse sanitation is critical. A preventitave fungicide spray program is required. Plant resistant or tolerant varieties where possible.

The information given herein is for educational purposes only. Reference to commercial products or trade names is made with the understanding that no discrimination is intended and no endorsement by the Texas AgriLife Extension Service is implied.

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Publication Revised July 2009

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