Q.foxtail grass
something to kill foxtail grass in potatoes without damaging potatoes
Downtoearthdigs
Answered on May 8, 2017
A pre emergent can be applied at a short time period in the spring, before most potato crops are planted.
If you use any post emergent, you do run the risk of killing your potatoes.
Here is a link with more information.
https://www.gardeningknowhow.com/plant-problems/weeds/controlling-foxtail-weeds.htm
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