Q.GRAPE VINES
HAVE 3 CONCORD VINES PLANTED 4 YRS AGO…..THEY WERE LOADED WITH LITTLE CLUSTERS OF GRAPES THIS SPRING….THEN ALL THE LITTLE GRAPES DRIED UP AND DISAPPEARED..VERY FEW LEFT TO RIPEN…WHAT KILLED THEM???FUNGUS??DISEASE???DIDNT SEE ANY BUGS..THE NEIGHBOR SPRAYED ROUNDUP ON HIS CORN BUT ITS 300YARDS TO OUR GRAPES… THANKS WOULD LIKE ANY INPUT

Downtoearthdigs
Answered on August 10, 2018
It sounds like Black Rot.
https://www.gardeningknowhow.com/edible/fruits/grapes/black-rot-grape-treatment.htm
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