Comparison of Postemergence Herbicides for Common Bermudagrass (<i>Cynodon dactylon</i>) Control in Peanut (<i>Arachis hypogaea</i>)

Grichar, W. James

doi:10.1017/s0890037x00024283

Cited by 15 publications

(14 citation statements)

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“…Field research indicated that 0.29 kg ha −1 clethodim controlled common bermudagrass 60–95% in sunflower ( Helianthus annuus L)26 and 30–86% in cotton ( Gossypium hirsutum L) 8. Clethodim applied at 0.14 kg ha −1 controlled common bermudagrass 61–86% in peanut ( Arachis hypogaea L),24 while 0.28 kg ha −1 clethodim controlled common bermudagrass 66% at peanut harvest and 72% the following summer 27. Two applications of 0.3 kg ha −1 clethodim separated by four weeks controlled common bermudagrass 59–98% and triploid hybrid cultivars ( TifEagle and TifSport ) 98% 8…”

Section: Resultsmentioning

confidence: 99%

“…Previous research evaluated the sensitivities of various bermudagrass populations to glyphosate,8, 17–22 clethodim8, 23–27 and glufosinate 28. However, these studies did not evaluate the relationship between herbicide dose (all studies tested up to three herbicide rates) and bermudagrass growth over a broad range of herbicide rates.…”

Section: Introductionmentioning

confidence: 99%

“…However, these studies did not evaluate the relationship between herbicide dose (all studies tested up to three herbicide rates) and bermudagrass growth over a broad range of herbicide rates. Many of these studies evaluated control of common bermudagrass in agronomic crops23–28 and not in highly managed turfgrass environment. The objective of this study was to characterize the dose–response of common bermudagrass, three commercial triploid hybrid cultivars and eight experimental triploid hybrid cultivars to three common herbicides.…”

Section: Introductionmentioning

confidence: 99%

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Bermudagrass (Cynodon spp) dose–response relationships with clethodim, glufosinate and glyphosate

Webster

Hanna

Mullinix

2004

Pest Management Science

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Greenhouse studies were conducted to evaluate the sensitivity of three commercial cultivars, eight experimental cultivars and common bermudagrass to clethodim, glufosinate and glyphosate. Each herbicide was applied at eight doses. Data were regressed on herbicide dose using a log-logistic curve (R2 = 0.56-0.95 for clethodim, R2 = 0.60-0.94 for glufosinate, and R2 = 0.70-0.96 for glyphosate). The herbicide rate that elicited a 50% plant response (I50) in the bermudagrass cultivars ranged from 0.04 to 0.19 kg ha(-1) clethodim, 0.19 to 1.33 kg ha(-1) glufosinate and 0.34 to 1.14 kg ha(-1) glyphosate. Relative to other cultivars, common bermudagrass was intermediate in its response to clethodim and among the most tolerant cultivars to glufosinate and glyphosate. TifSport was relatively tolerant to clethodim and glufosinate compared with other cultivars, but relatively sensitive to glyphosate. One cultivar, 94-437, was consistently among the most sensitive cultivars to each of the herbicides. While there were differential herbicide tolerances among the tested bermudagrass cultivars, there did not appear to be any naturally occurring herbicide resistance that could be commercially utilized. However, research indicated that breeding efforts should target herbicide resistance that is at least four times the registered use rate. Also, TifSport and Tifway have been identified as suitable representatives of triploid hybrid bermudagrass cultivars to be used to evaluate the success of turfgrass renovation programs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bermudagrass (Cynodon spp) dose–response relationships with clethodim, glufosinate and glyphosate

Webster

Hanna

Mullinix

2004

Pest Management Science

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“…A single application of 0.3 kg/ha clethodim controlled common bermudagrass as well as the best treatments in 1999, whereas in 2001 this treatment had no effect on common bermudagrass. Common bermudagrass control with 0.28 kg/ha clethodim has been shown to be variable among years (43 to 84%), and control was improved when sequential applications were made (83 to 95% control) (Grichar 1995). In the current study, sequential applications of 0.15 kg/ha clethodim and 0.3 kg/ha clethodim controlled common bermudagrass 79 and 98% in 1999, respectively, and 24 and 59% in 2001, respectively.…”

Section: Resultsmentioning

confidence: 99%

Sensitivity of Triploid Hybrid Bermudagrass Cultivars and Common Bermudagrass to Postemergence Herbicides¹

Webster¹,

Bednarz²,

Hanna³

2003

Weed Technology

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The potential weediness of hybrid bermudagrass cultivars in nontarget areas is an important factor when considering the development of herbicide-resistant cultivars. Field studies evaluated the response of common bermudagrass, hexaploid hybrid ‘Tifton-10’, and two triploid hybrid bermudagrass cultivars (‘TifEagle’ and ‘TifSport’) to clethodim, fluazifop-p, glufosinate, glyphosate, and quizalofop-p. Glyphosate was more consistent than clethodim and clethodim plus glyphosate in controlling common bermudagrass. The triploid cultivars were equally sensitive to each of these treatments, whereas Tifton-10 control was highest with treatments that included glyphosate. Variability between years in control of common bermudagrass was attributed to differences in plant size at application, with greater control of smaller plants. All herbicides reduced common bermudagrass plant diameters ≥ 93% in 1999 when grown without a crop. However, in 2001, only herbicide treatments that included two applications of 1.1 kg ai/ha glyphosate reduced plant diameters 6 to 59%. None of the other treatments reduced common bermudagrass plant diameters compared with pretreatment values. When grown with cotton, fluazifop-p and 4.5 kg/ha glyphosate were the only treatments consistent across cultivars and years. All herbicide treatments reduced triploid hybrid bermudagrass plant diameters ≥ 90%, whereas Tifton-10 plant diameters were reduced > 86% by all treatments, with the exception of clethodim. As in the non-cropland study, common bermudagrass plant diameters were reduced ≥ 97% by herbicides in 1999, whereas in 2001, only fluazifop-p and glyphosate treatments reduced plant diameters compared with the nontreated control. Both the lack of aggressiveness and susceptibility to common herbicides of the triploid hybrid cultivars relative to common bermudagrass indicates that these non–pollen-producing or -receiving cultivars are reasonable candidates for the introduction of herbicide resistance.

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“…Em trabalho com Cynodon dactylon, Johnson (1995) demonstrou que os cultivares Commom, Cheyenne, Tropica e Sahara têm suscetibilidades diferentes a um mesmo herbicida. Para alguns herbicidas recomendase a aplicação sequencial, realizada em plantas jovens e posteriormente em adultas (Santos, 2008), e repetida ao longo dos anos, para o controle de espécies como Cynodon dactylon (Grichar, 1995), sendo o glyphosate indicado para o seu controle.…”

Section: Introductionunclassified

Tolerância do Tifton 85 ao glyphosate em diferentes épocas de aplicação

Santos¹,

Freitas

Ferreira³

et al. 2010

Planta daninha

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RESUMO -O Tifton 85 é uma forrageira de alto valor nutritivo, recomendada para pastejo, fenação e silagem, podendo ser considerada uma espécie daninha, principalmente em áreas de cultivos agrícolas e produção de sementes de outras forrageiras, devido a sua fácil propagação e seu rápido desenvolvimento. Este experimento foi proposto com o objetivo de avaliar a tolerância de plantas de Tifton 85 a doses crescentes de glyphosate em duas épocas diferentes. O experimento foi conduzido em vasos de polietileno com capacidade de 10 L, em delineamento experimental de blocos casualizados, no esquema fatorial 2 x 8, sendo duas épocas de aplicação (inverno e verão) e oito doses de glyphosate (0, 270, 540, 1.080, 2.160, 3.240, 4.320 e 5.400 g ha), com quatro repetições. Para cada época de aplicação, o controle das plantas de Tifton 85 foi feito aos 15, 30 e 60 DAA (dias após aplicação). Obteve-se controle superior a 90% de Tifton 85 a partir de 2.636,72 g ha -1 de glyphosate em aplicação realizada no inverno e de 3.607,03 g ha -1 em aplicação no verão. Os resultados evidenciaram a alta tolerância do Tifton 85 ao glyphosate e o maior controle das plantas expostas a esse herbicida em épocas mais frias do ano (inverno), quando em comparação com as plantas expostas ao herbicida no verão.Palavras-chave: Cynodon spp., pastagem, planta daninha, forrageiras.ABSTRACT -Tifton 85 is a type of forage of high nutritive value, recommended for grazing or hay and silage production. It can be considered a weed, mainly in agricultural and forage seed production areas, probably due to its easy propagation and fast development. Thus, this experiment aimed to evaluate Tifton 85 tolerance to increasing levels of glyphosate during two different seasons. The experiment was arranged in a completely randomized block design with four replications in a 2 x 8 factorial arrangement, and pulverization in two seasons (winter and summer) and eight glyphosate levels (0; 270; 540; 1,080; 2,160; 3,240; 4,320; and 5,400 g ha -1 ). The experiment was carried out in polyethylene pots with 10L capacity. For each season, control of the Tifton 85 plants was performed at 15, 30 and 60 DAA (days after application). Around 90% of Tifton 85 plant control was observed with 2,636.72 g ha -1 of glyphosate in the winter and 3,607.03 g ha -1 of glyphosate in the summer. The results obtained showed that Tifton 85 is highly tolerant to glyphosate and control is more efficient in the winter than in the summer.

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Comparison of Postemergence Herbicides for Common Bermudagrass (Cynodon dactylon) Control in Peanut (Arachis hypogaea)

Cited by 15 publications

References 9 publications

Bermudagrass (Cynodon spp) dose–response relationships with clethodim, glufosinate and glyphosate

Bermudagrass (Cynodon spp) dose–response relationships with clethodim, glufosinate and glyphosate

Sensitivity of Triploid Hybrid Bermudagrass Cultivars and Common Bermudagrass to Postemergence Herbicides¹

Tolerância do Tifton 85 ao glyphosate em diferentes épocas de aplicação

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Comparison of Postemergence Herbicides for Common Bermudagrass (Cynodon dactylon) Control in Peanut (Arachis hypogaea)

Cited by 15 publications

References 9 publications

Bermudagrass (Cynodon spp) dose–response relationships with clethodim, glufosinate and glyphosate

Bermudagrass (Cynodon spp) dose–response relationships with clethodim, glufosinate and glyphosate

Sensitivity of Triploid Hybrid Bermudagrass Cultivars and Common Bermudagrass to Postemergence Herbicides1

Tolerância do Tifton 85 ao glyphosate em diferentes épocas de aplicação

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Sensitivity of Triploid Hybrid Bermudagrass Cultivars and Common Bermudagrass to Postemergence Herbicides¹