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Downy Mildew (Plasmopara viticola)

DAMAGE AND SYMPTOMS

 

LIFE CYCLE

 

MANAGEMENT

 

"Oil spot” on the surface of a leaf. (Mark D. Welch)

Colony of sporangia on underside of a leaf. (Mark D. Welch)

 

SOURCES:

Wilcox, Wayne. 2017. “Downy Mildew.” Grape Disease Control for 2017. Geneva, NY: Cornell University.

Gubler, W. Douglas, George M. Leavitt, and Larry J. Bettiga. 2013. “Downy Mildew.”  Pp. 117-119 in Grape Pest Management, 3rd. Edition. Larry J. Bettiga, Technical Editor. Oakland, CA: University of California Agriculture and Natural Resources: