Syngenta Gesagard Pre-Emergent Herbicide Prometryn Broadleaf Weed Killer

7 | Does Gesagard leach in sandy soils?. Rotate modes: Gesagard is Group 5; alternate with Group 15 chloroacetamides or Group 2 ALS inhibitors. 1 | Does Gesagard need rainfall to work?. Yes—5–10 mm within a week is ideal; if soils are dry, a light irrigation or 2 cm incorporation ensures the herbicide sits in the germination zone.

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