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Herbicides are chemicals used to kill plants. Use this tag with questions about how to choose and use herbicides on different plants.

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7 answers
218k views

To be effective, how long does Glyphosate weed killer need to be applied before it rains?

Yesterday I used around 3 litres (approximately 1 gallon) of glyphosate (generic Roundup) around my garden. It was in the evening around 6pm. This morning I awoke to the sound of rain. Will the rain …
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