Herbicide injury symptoms from PPI herbicides in tomatoes

Dual II Magnum injury can occur in cool, wet conditions and low OM (<2%) soils.

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.

Treflan can cause leaf purpling, stand loss and reduce root growth in cool, wet conditions, low OM (<2%) soils and shallow plantings (<4").

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.

For more information:
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