Problem on grape clusters

Question

My grape vines are loaded with tiny grapes but now the grapes look to be opening up into a fluffy flower. I’m afraid I am losing my grapes. What is happening. They had seemed so healthy.

Answer 1

Without an image, the best I can determine is Botrytis cinerea fungus.

http://cru.cahe.wsu.edu/CEPublications/FS046E/FS046E.pdf

https://www.gardeningknowhow.com/edible/fruits/grapes/

You may want to take the grapes into your local County Extension Office. They can help with any local disease issues.

Here is a link to help you locate your closest office.

https://www.gardeningknowhow.com/extension-search