Weeds galore - Ask Extension
I have some weeds in my field that are very resistant to Roundup. I have included pictures hoping you can help identify them and recommend the right w...
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Weeds galore #341508
Asked July 10, 2016, 6:34 PM EDT
I have some weeds in my field that are very resistant to Roundup. I have included pictures hoping you can help identify them and recommend the right weed killer. These weeds are taking over everything.
Thank you for your help.
Regards,
Diann Paarmann
Carroll County Maryland
Expert Response
Looks like you may have round up resistance building up. I am not 100% sure, but it looks as if you have Marestail weed, which is notorious for developing resistance to herbicide.
Please see:
https://extension.umd.edu/sites/default/files/_docs/programs/ipmnet/Marestail-UMD%20IPMnet.pdf
https://www.btny.purdue.edu/WeedScience/marestail/ID-323%20HorseWeed.pdf
Please see:
https://extension.umd.edu/sites/default/files/_docs/programs/ipmnet/Marestail-UMD%20IPMnet.pdf
https://www.btny.purdue.edu/WeedScience/marestail/ID-323%20HorseWeed.pdf