Herbicide Injury Symptoms from POST herbicides in tomatoes

Sencor injury can occur in cool, cloudy conditions and high pH (>7.8) soils.

Sencor moves upward in the plant in the transpiration stream, so injury symptoms are typically seen in older leafl tissues. The leaves will show chlorosis (yellowing or whitening) between the leaf veins and burning around the leaf margins.

Pinnacle injury can occur in sensitive cultivars and in hot, humid conditions.

Pinnacle translocates in the phloem to new developing tissues, so injury symptoms will be seen in the 'heart' of the plants at the growing points. Injured plants will cease growth and turn chlorotic within days of application, especially if the herbicide is applied in hot weather to sensitive varieties. Check for variety sensitivity with processing representatives. For fresh market varieties, always test on a few representative plants before spraying the whole block.

Temperatures above 29C (85 F) under humid conditions may results in temporary injury from Prism.

Prism injury symptoms may be observed in hot, humid weather and will appear in the youngest leaves. Symptoms include chlorosis and slight stunting. Variety sensitivity to Prism is not as prevalent as to Pinnacle.

For more information:
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