Herbicide - Knowledgebase Question

Vancouver, WA
Question by johnwesterd
March 11, 1998
I have a client that requested information on the product "Preen." I would like to know what is the active ingredient and if it can be used as a preplant with wildflowers.


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Answer from NGA
March 11, 1998

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The active ingredient in Preen is Trifluralin, which inhibits the growth of roots and shoots. It's registered for use around 30 different plants - check the label to see if the wildflowers are each listed before using the product.

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