Apple Tree Leaf Distortions and Cupping From Herbicides

Symptoms

• Abnormal growth, necrosis, blistering and discoloration occurs in plant tissues.

Leaf cupping of hybrid elm due to exposure to growth regulator-type herbicides. Damage would be similar on apple leaves. (Aaron Bergdahl, ND Forest Service)

Strapping and distortion of apples leaves due to exposure to growth regulator-type herbicides (Joseph Zeleznik, NDSU)

Management and other important facts

• Always read and follow the product label when applying herbicides.
• Avoid applying herbicides during windy conditions to prevent herbicide drift.
• Avoid applying broadleaf herbicides on warm days.
• The use of farm-grade chemicals for broadleaf weed control on lawns has killed even mature trees.

Authors: Aaron Bergdahl and Joseph Zeleznik

This website was supported by the U.S. Department of Agriculture’s (USDA) Agricultural Marketing Service through grant 14-SCBGP-ND-0038.

Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the USDA.