Resistance of Palmer Amaranth (<i>Amaranthus palmeri</i>) to the Dinitroaniline Herbicides

Gossett, Billy J.; Murdock, Edward C.; Toler, Joe E.

doi:10.1017/s0890037x00035843

Cited by 110 publications

(96 citation statements)

References 6 publications

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“…These populations also showed various degrees of crossresistance to four other dinitroaniline herbicides: benefin, isopropalin, pendimethalin, and ethalfluralin (Gossett et al 1992). The dry shoot weights of resistant and susceptible biotypes were similar, suggesting no significant fitness costs associated with resistance (Gossett et al 1992). Trifluralin resistance in Palmer amaranth was also reported in Tennessee in 1998 (Heap 2012).…”

Section: Herbicide Resistancementioning

confidence: 85%

“…Trifluralin resistance was confirmed in 1989 in Palmer amaranth populations from eight different locations in South Carolina. These populations also showed various degrees of crossresistance to four other dinitroaniline herbicides: benefin, isopropalin, pendimethalin, and ethalfluralin (Gossett et al 1992). The dry shoot weights of resistant and susceptible biotypes were similar, suggesting no significant fitness costs associated with resistance (Gossett et al 1992).…”

Section: Herbicide Resistancementioning

confidence: 92%

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Mechanism of extreme genetic recombination in weedy Amaranthus hybrids

Steinau

Skinner²,

Steinau

2003

Weed Science

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Interspecific hybridization of Palmer amaranth and common waterhemp produce hybrids with unique DNA fragments not found in either parent. The objective of this research was to investigate the mechanisms involved in the formation of the polymorphic fragments. Six novel fragments were cloned and sequenced. Five of the six were significantly similar to plant transposons, the sixth was similar to squamosa promoter–binding proteins from other plant species. Southern blot analysis using one of the novel fragments as probe revealed a consistent pattern of repetitive DNA that was species and biotype specific. These results indicate that transposon-like elements may play an important role in the formation of new fragments in Amaranthus hybrids derived from interspecific hybridization, suggesting that considerable instability of the hybrid genome may occur.

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Section: Herbicide Resistancementioning

confidence: 85%

Section: Herbicide Resistancementioning

confidence: 92%

Mechanism of extreme genetic recombination in weedy Amaranthus hybrids

Steinau

Skinner²,

Steinau

2003

Weed Science

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“…As of 2010, glyphosate-resistant Palmer amaranth populations have been confirmed in 10 states [28]. Additionally, the Palmer amaranth populations resistant to dinitroaniline herbicides have been also reported [28,29].…”

Section: Introductionmentioning

confidence: 99%

Integrated Palmer Amaranth Management in Glufosinate-Resistant Cotton: I. Soil-Inversion, High-Residue Cover Crops and Herbicide Regimes

et al. 2012

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A three year field experiment was conducted to evaluate the role of soil-inversion, cover crops and herbicide regimes for Palmer amaranth between-row (BR) and within-row (WR) management in glufosinate-resistant cotton. The main plots were two soil-inversion treatments: fall inversion tillage (IT) and non-inversion tillage (NIT). The subplots were three cover crop treatments: crimson clover, cereal rye and winter fallow; and sub subplots were four herbicide regimes: preemergence (PRE) alone, postemergence (POST) alone, PRE + POST and a no herbicide check (None). The PRE herbicide regime consisted of a single application of pendimethalin at 0.84 kg ae ha −1 plus fomesafen at 0.28 kg ai ha −1 . The POST herbicide regime consisted of a single application of glufosinate at 0.60 kg ai ha −1 plus S-metolachlor at 0.54 kg ai ha −1 and the PRE + POST regime combined the prior two components. At 2 weeks after planting (WAP) cotton, Palmer amaranth densities, both BR and WR, were reduced ≥90% following all cover crop treatments in the IT. In the NIT, crimson clover reduced Palmer amaranth densities >65% and 50% compared to winter fallow and cereal rye covers, respectively. At 6 WAP, the PRE and PRE + POST herbicide regimes in both IT and NIT reduced BR and WR Palmer amaranth densities >96% over the three years. Additionally, the BR density was reduced OPEN ACCESSAgronomy 2012, 2 296≥59% in no-herbicide (None) following either cereal rye or crimson clover when compared to no-herbicide in the winter fallow. In IT, PRE, POST and PRE + POST herbicide regimes controlled Palmer amaranth >95% 6 WAP. In NIT, Palmer amaranth was controlled ≥79% in PRE and ≥95% in PRE + POST herbicide regimes over three years. POST herbicide regime following NIT was not very consistent. Averaged across three years, Palmer amaranth controlled ≥94% in PRE and PRE + POST herbicide regimes regardless of cover crop. Herbicide regime effect on cotton yield was highly significant; the maximum cotton yield was produced by the PRE + POST herbicide regime. Averaged over three years, the PRE, POST and PRE + POST cotton yields were about three times higher than no herbicide regime. In a conservation tillage production system, a PRE + glufosinate POST herbicide based regime coupled with a cereal rye cover crop may effectively control Palmer amaranth and maximize cotton yields.

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“…These resistant biotypes occurred in areas where trifluralin had been used over a 20 year period in both cereals and oilseed crops. A dinitroaniline resistant biotype of Amaranthus palmerii was confirmed in 1991 from cotton fields that had received 24 consecutive years of trifluralin (Gossett et al, 1992). Both the S. viridis and A. palmerii were resistant to other dinitroanilines (Beckie and Morrison, 1993;Gossett et al, 1992).…”

Section: Development Of Herbicide Resistance In North Americamentioning

confidence: 95%