Dear Denise: How are grapes pollinated —n by insects or, like corn, by winds? This past spring, I had many bunches of grapes on my vines. I realize that we had a very wet spring, but I thought the ...

Concord) that has had a problem the last few years. It gets lots of grapes that grow to full size, but then about 90 percent of them turn black and shrivel up. What problem do I have? Concord’ ...

While Botrytis is the most destructive plant pathogen in grapes, powdery mildew is also a persistent U.S. vineyard threat. Mevalone is a formidable tool to assist growers in their fight against both ...

Q: Are there any varieties of grapes that are naturally resistant to the black rot disease that ruins the fruit? I am reluctant to spray them, and my past experience has been that keeping them pruned ...

Grapes are one of the most difficult fruit to grow here in Kentucky. A disease called black rot is by far the most common disease problem on grapes. Black rot (caused by the fungus Guignardia ...

Q: My grapes look fine as they begin to grow. Then when the fruit is half to two-thirds grown, brown discolorations appear. Then the grapes turn dark and shrivel. What’s the problem? A: These symptoms ...

A new fungicide which controls bunch rot and powdery mildew in grapes has been approved for use in New Zealand, subject to conditions. Kenja contains the active ingredient isofetamid, which is new to ...

Q: I am having trouble with my grapes. They form early. After they have formed and are still green, they begin to shrivel up and dry on the vine before they ripen. They have been this way for the last ...