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Ottawa, Ontario | Many variables apply to this question.
Rainfall after application.
Rates used.
Soil type.
Weed pressure ? Field history ?
Crop Canopy.
I can say that when applied to a corn crop premerge it sometimes runs out prior to 8 leaf stage, sometimes it holds.
In RR corn I apply Round-up + Atrazine at the 2 leaf stage and then follow up with another shot of Round-up to knock back any escapes at the 7-8 leaf stage...So this would give me roughly 4-5 weeks?? depending on speed of emergence.
You also have to consider rotational restrictions and adhere to the product labels when re-applying any product. | |
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Spraying preemerge
