Deep suture is a genetic disorder that is a problem of the Bing and Black Tartarian varieties.

Identification

Fruit and leaf symptoms of deep suture can develop spontaneously on Bing and Black Tartarian trees that were previously free of symptoms. An atypically deep cleft or crease develops in fruit along the suture line. Affected trees may be stunted with reduced fruit yield.

Leaves on cherries with deep suture are longer and more narrow than normal leaves. They are commonly thickened with a surface that appears roughened. Deep sutures can also develop on fruit doubles caused by stress during bud development the previous growing season. Just one fruit per stem and trees with long narrow leaves distinguishes deep suture from fruit doubles.

Disorder Development

Deep suture is caused by a spontaneous mutation that occurs within buds. It is not infectious, except that it can be spread when wood from affected branches is used for budding or grafting.

Solutions

Do not use wood from affected trees for budding or grafting. Cut off any affected limbs. Replace trees that are not performing as desired.

References

Adapted from Integrated Pest Management for Stone Fruits and Pests of the Garden and Small Farm: A Grower's Guide to Using Less Pesticide, University of California Statewide Integrated Pest Management Program (UC IPM).