Colletotrichum leaf spot of hedera helix

Disease Information

Colletotrichum leaf spot

Symptoms

Brown, sunken lesions on leaves, sometimes with tiny black specks in the centers. Appears very similar to Xanthomonas leaf spot. Common on juvenile forms when overhead irrigation is used; predominant in summer.

Management

Reduce overhead irrigation; use drip irrigation to prevent spread of the pathogen through water splash. Use only disease-free propagation materials. Trim and dispose of infected plant material. Increase air movement to reduce relative humidity. Treat with copper hydroxide (Kocide ), ® manzate (Dithane , Fore ), iprodione ® ® (Chipco 26019W P) or azoxystrobin ® (Heritage ) to reduce disease spread.



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