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Waynette from Greenville, Tx writes

How long do I need to apply before rainfall for Atrazine to be fully effective?

Rainfall imminant and spraying with Atrazine

Answer:

Per the product label for Southern Ag Atrazine Weed Killer for St. Augustine Grass: Rain or water within 2 or 3 days of application may decrease the effectiveness on emerged weeds. However, for the control of weeds from seeds, rainfall or watering is necessary within 7 to 10 days after treatment

Answer last updated on: 03/07/2016

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