Grape black rot, caused by the homothallic ascomycete Phyllosticta ampelicida, is a disease originating from North America and is widespread in Europe. To investigate population structure and ...

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 ...

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’ ...

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 ...

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AMES, Iowa | Grapes grow well in a wide range of soil conditions but do best on well-drained soils. Horticulturists with Iowa State University Extension and Outreach answer questions about growing and ...