Lima Downy Mildew Alert

Bob Mulrooney, Extension Plant Pathologist; bobmul@udel.edu

Downy mildew has been identified in several fields in Sussex Co. and one in Kent Co. on C-elite and Cypress. Infection severity and occurrence has been low so far. Applications of 2 lbs/A of Ridomil Gold/Copper or Phostrol 2-3 pts/A will provide very good control if applied before infection occurs or when the first infection appears in the field. Be sure to scout all limas from this point on until harvest. See Downy Mildew on Lima Beans in WCU 16:23 for more information on fungicide options and Threat of Lima Bean Diseases Increases in WCU 16:26 for photos and information on environmental conditions conducive to the disease.

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