Herbicide injury symptoms from PPI herbicides in tomatoes

Dr. Darren Robinson, Ridgetown Campus – University of Guelph; Janice LeBoeuf, OMAFRA, Ridgetown

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Tomato injury from Dual

Dual does not translocate far in the plant, and injury symptoms occur only in stressed plants in cold, wet weather. If injury does occur, symptoms will include yellowing and curling of the new leaves and petioles.

Tomato injury from Treflan

Tomatoes are particularly susceptible to Treflan/Bonanza/Rival injury on low organic matter soils, or if transplants have been placed too shallow in the soil. Injury symptoms include club roots, stunting and occasionally purpling of leaves.

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