This time of year is often when leafhoppers come a-callin’.  You can see below from our research station at Perkins the damage that leafhoppers can cause:

Leafhopper stippling

Leafhopper stippling

Severe infestations can lead to early leaf drop which, in turn, leads to reduced carbohydrate storage and reduced winter hardiness.  There are many chemical control options and I suggest consulting the Midwest Grape and Small Fruit Spray Guide for the list of possible choices (http://www.ag.purdue.edu/hla/Hort/Documents/ID-169-2011.pdf).

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