County Maps of Herbicide Resistance in Palmer Amaranth from Mississippi

Tom Eubank, Research/Extension Weed Scientist
By Tom Eubank, Research/Extension Weed Scientist June 2, 2011 13:03

County Maps of Herbicide Resistance in Palmer Amaranth from Mississippi

Mississippi producers have numerous weed species that they battle throughout the growing season but no single weed can have as much of a negative impact on row crops than Palmer amaranth (Amaranthus palmeri). In an effort to aid Mississippi producers in their decision making process a statewide survey was conducted to determine where glyphosate and/or ALS-resistant Palmer amaranth was present in the state. Theses maps were generated to inform producers of where this problem has been documented in Mississippi so they can make sound decisions in regards to resistance management strategies. http://msucares.com/crops/weeds/resistant/index.html

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Tom Eubank, Research/Extension Weed Scientist
By Tom Eubank, Research/Extension Weed Scientist June 2, 2011 13:03
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2 Comments

  1. WES BRIGGS June 5, 20:32

    Tom, this is Wes Briggs, still checking cotton in South GA, FL,& AL, hope all is well. Wondering if you are aware of any problems in MS. where Reflex + Staple were used pre-emerge? This tank mixture has caused tremendous stunting and very erratic plant height in the same row, we have had to take the Staple out of this tank mix. Our cotton is coming up very slow, I think we also have problems this year with poor seed vigor, we have re-planted more irrigated cotton than I can remember due to vigor combined with pre-emerge herbicides. Thanks Wes

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  2. David Short June 7, 06:28

    Wes, I am the Dupont rep for the southern half of Miss. I am unaware of any stand irregularities with Staple. However, Staple + Reflex is not a common tankmix in this area at this time. Staple + Cotoran/other typically does not result in stands as you described. In the past 15+ use seasons, any adverse results are usually related to extreme environmental conditions. I realize you are in a different situation in S. GA with different soils, etc. which may be a contributing factor.

    David Short
    601.594.9223

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