In-Season Applications of Glyphosate for Control of Redvine (<i>Brunnichia ovata</i>) in Glyphosate-Resistant Soybean

Akin, D. Scott; Shaw, David R.

doi:10.1614/wt-03-074r1

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…Glyphosate applied EPOST or EPOST fb LPOST had no effect on density, but reduced dry biomass of redvine (38 to 79%), compared to that with no glyphosate control in glyphosate-resistant soybean (Table 1). However, in a field study by Akin and Shaw (2004), in-crop application of glyphosate reduced redvine density in glyphosate-resistant soybean. Those authors observed that both single and sequential in-crop applications of glyphosate re-duced redvine density by 31 and 42%, respectively, compared to that with no glyphosate.…”

Section: Resultsmentioning

confidence: 91%

“…Furthermore, glyphosate movement gradually decreases from the point of attachment of treated shoot to farther along the rootstock (Chachalis and Reddy 2005). As a result, control of these vines in glyphosate-resistant soybean may be unsatisfactory with glyphosate registered-use rates (Akin and Shaw 2004;Bradley et al 2004;Chachalis and Reddy 2004;Chachalis et al 2001;Reddy 2000;Yonce and Skroch 1989).…”

Section: Introductionmentioning

confidence: 99%

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Deep Tillage and Glyphosate-Reduced Redvine (Brunnichia ovata) and Trumpetcreeper (Campsis radicans) Populations in Glyphosate-Resistant Soybean

Reddy¹

2005

Weed technol.

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Field studies were conducted during the years 2000 to 2003 at Stoneville, MS, to determine the efficacy of fall deep tillage and glyphosate applications on redvine and trumpetcreeper populations and soybean yield in glyphosate-resistant soybean. Fall deep (≈45 cm) tillage for 1, 2, and 3 yr reduced redvine density by 95, 88, and 97%, respectively, compared with shallow (≈15 cm) tillage, but deep tillage did not reduce trumpetcreeper density. Glyphosate applied preplant reduced trumpetcreeper density (25 to 44%), but not redvine density, compared to that with no glyphosate. Glyphosate early postemergence (EPOST) either alone (45 to 67%) or followed by (fb) late postemergence (LPOST; 59 to 83%) reduced density of trumpetcreeper, but not of redvine, compared to that with no herbicide. However, dry biomass of both vines was reduced with glyphosate EPOST or LPOST compared to that with no herbicide. Soybean yields were higher with deep tillage vs. shallow tillage, glyphosate preplant application vs. no glyphosate, and glyphosate EPOST either alone or fb LPOST vs. no herbicide. Redvine did not reestablish in 2003, which was after skipping fall deep tillage for 1 yr following three consecutive years of deep tillage compared with shallow tillage. It is possible to manage redvine infestations with fall deep tillage and trumpetcreeper infestations with glyphosate preplant and postemergence (POST) in-crop applications. Integration of fall deep tillage and glyphosate POST applications could be an effective strategy to manage combined infestations of these vines in glyphosate-resistant soybean.

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Section: Resultsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Deep Tillage and Glyphosate-Reduced Redvine (Brunnichia ovata) and Trumpetcreeper (Campsis radicans) Populations in Glyphosate-Resistant Soybean

Reddy¹

2005

Weed technol.

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“…Of these six weeds, only yellow nutsedge was given an importance rating of 2.0 or higher by all respondents. Most of these weeds probably received this rating because of greater tolerance to glyphosate compared with other more sensitive species (Akin and Shaw 2004;Culpepper et al 2004Culpepper et al , 2005Fairbanks et al 2001;Norsworthy et al 2001).…”

Section: Resultsmentioning

confidence: 99%

Consultant Perspectives on Weed Management Needs in Arkansas Cotton

Norsworthy¹,

Burgos²,

Scott³

et al. 2007

Weed Technology

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Certified Crop Advisors of Arkansas and members of the Arkansas Crop Consultants Association were surveyed in Fall 2006 through direct mail to assess current weed management practices and needs in cotton from both a research and educational perspective. Consultants reported scouting 162,300 of the possible 473,700 ha of cotton grown in Arkansas. Collectively, glyphosate-resistant and enhanced glyphosate-resistant cultivars were reported grown on 98% of the cotton hectares. Ninety-five percent of the consultants believe the planting of enhanced glyphosate-resistant cultivars will increase over the next 5 yr. All consultants indicated a “moderate” to “high” level of concern with herbicide-resistant weeds in cotton, and 79% of the consultants suspect herbicide resistance in the fields they scout, predominately glyphosate-resistant horseweed. Horseweed, Palmer amaranth, and morningglories were the three most problematic weeds in cotton. A continued focus on resistant weed management was the most frequent research and educational request by consultants.

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