Cankers on trunks, limbs and branches of sweet cherry, tart cherry, plum and prune exude gum during late spring and summer. Leaf, fruit and blossom infections are common following prolonged wet, cold periods during or soon after bloom. Leaf spots are dark brown, circular to angular and sometimes surrounded with yellow halos.
Spurs with infected leaves and fruit often die back. Infected leaf and flower buds may fail to open in spring, resulting in a condition referred to as “dead bud.” Terminals and branches may wilt and die in summer or early autumn if girdled by a canker. Occasionally, large scaffold limbs are killed. |
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| Bacterial canker on sweet cherry. |
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| Bacterial canker on tart cherry. |
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