“We started getting complaints from some of our growers a few years ago about the presence of the disease, even though they were closely following the recommended spray program,” said Nicole Ward Gauthier, extension plant pathologist in the UK College of Agriculture, Food and Environment.
Bitter rot tends to be more prevalent during wet years. It is found on apples hanging on trees as well as in stored fruit. Disease symptoms include dark brown or black spots with a number of slightly raised dark cushions near the centers. These cushions frequently make a target-shaped appearance on fruit and can have slimy pink spores oozing from them.
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