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Crabgrass loves the heat, so it doesn’t start popping up until soil surfaces warm up. When soil temperatures remain around 55 degrees for a few days, baby crabgrass plants start appearing.
To prevent growth of crabgrass, preemergent herbicides must be applied at a critical time. If they are applied to the soil too early, they get washed too deep into the soil or washed away by rainwater. If they are applied too late, the key enzyme inhibited is no longer active. The best control requires a second application about 6–8 weeks later.
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It does not accumulate in soil and is non-harmful to microflora. [6] DMPA has in testing been applied at rates as high as 67 lbs per acre. [7] Zytron may cause neurotoxicity in chickens. It is an organophosphorus ester, and other such chemicals are known to cause similar neurotoxicity. 100 mg/kg daily for 10 days was considered the minimum ...
Proturk Goosegrass and Crabgrass Control and Anderson's Goose and Crabgrass Control both have bensulide as one of their active ingredients, along with oxadiazon at a concentration of 5.25% and 1.31% respectively. [3] Bensulide products may be used outdoors by homeowners on lawns and ornamentals, and by professional lawn care operators.