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.
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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