Glyphosate Injury
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Glyphosate (Round-up) injury. This non-selective herbicide, which is used to control grasses and broadleaf weeds, is systemic. Any spray drift will be absorbed by leaves and translocated throughout the entire plant, often resulting in death. Symptoms appear as a strong yellowing of newly emerged leaves and a yellowing of the center/base of older leaves.
Management:
- Avoid spray drift by using shielded sprayers and spraying on calm days.
Glyphosate injury to pumpkin foliage.
(Photo: Timothy Coolong, University of Kentucky)