Bermudagrass (Cynodon dactylon) Control in Sunflower (Helianthus annuus), Soybean (Glycine max), and Potato (Solanum tuberosum) with Postemergence Graminicides

Bedmar, Francisco

doi:10.1017/s0890037x00043256

Cited by 9 publications

(15 citation statements)

References 14 publications

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“…Other studies have reported substantial variation in bermudagrass response to herbicide application. Differences among bermudagrass plant size have previously been cited as an explanation in variability of control among years and cultivars/ecotypes 8, 19, 23, 26. The similarity in bermudagrass plant diameters in this study and the consistency in control for each cultivar across repetitions of the study tend to support the contention that differences in size of bermudagrass plants may affect repeatability of results.…”

Section: Discussionsupporting

confidence: 81%

“…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.…”

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: Discussionsupporting

confidence: 81%

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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“…Alguns trabalhos reportam problemas causados por plantas do gênero Cynodon em culturas agronômicas, como cana-de-açúcar (Oliveira & Freitas, 2008), milho (Vaz de Melo et al, 2007), pomares de citros (Martini et al, 2002), batata e soja (Bedmar, 1997).…”

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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Fenoxaprop combined with urea improves photosynthesis, weed control, and yield of potato

2021

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This study aimed to evaluate the effects of combined application of fenoxaprop (fenoxaprop-p-ethyl) and urea on potato (Solanum tuberosum L.) photosynthesis, weed control, and yield. The optimal sequence and dosage of the urea and fenoxaprop combination on potato production was investigated using different concentrations of urea (0, 1, 2, 4, and 8 g L −1) and fenoxaprop (0, 1.33, 2.66, 5.32, and 7.98 ml L −1) in a randomized block experiment. Potato plant photosynthesis levels, weed control efficacy, and potato yield were explored through the analysis of chlorophyll content index (CCI), photosynthetic parameters, weed-related statistics, and polynomial regression. The results showed fenoxaprop stress not only reduced indices such as the CCI and net photosynthetic rate (Pn) but also decreased the activity, maximum photochemical efficiency, and quantum efficiency of Photosystem II, and the photochemical quenching coefficient. Urea at concentrations of 1-4 g L −1 antagonized the toxicity of fenoxaprop, whereas 8-g L −1 urea aggravated herbicide toxicity. Compared with fenoxaprop treatment alone, the combination of 4-g L −1 urea and 1.33-ml L −1 fenoxaprop significantly increased the Pn of potato plants, weed control efficacy, and potato tuber yield by 36.12, 11.35, and 11%, respectively. Furthermore, treatment with urea first, followed by fenoxaprop, displayed greater efficacy in weed control than fenoxaprop followed by urea. Taken together, urea at concentrations of 1-4 g L −1 may alleviate the side effects of fenoxaprop on potato seedlings. Meanwhile, urea treatment (4 g L −1) followed by fenoxaprop (1.33 ml L −1) may be the optimal combination for potato production.

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Bermudagrass (Cynodon dactylon) Control in Sunflower (Helianthus annuus), Soybean (Glycine max), and Potato (Solanum tuberosum) with Postemergence Graminicides

Cited by 9 publications

References 14 publications

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

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

Tolerância do Tifton 85 ao glyphosate em diferentes épocas de aplicação

Fenoxaprop combined with urea improves photosynthesis, weed control, and yield of potato

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