Annual Weed Control by Glyphosate in Glyphosate-Resistant Soybean (<i>Glycine max</i>)

Ateh, Comfort M; Harvey, R. G.

doi:10.1017/s0890037x00041920

Cited by 54 publications

(69 citation statements)

References 8 publications

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“…Vangessel et al (2000) found that glyphosate application at cracking and at the unifoliate leaf stage did not give season-long control and resulted in reduced yields. In this study, the most appropriate time of application of a single glyphosate treatment for optimum weed control would be the late second to third trifoliate stage, confirming the results of several authors (Ateh and Harvey 1999;Mulugeta and Boerboom 2000;Vangessel et al 2000;Krausz and Young 2001). Although sequential treatments controlled weeds best, they did not provide a significant additional benefit in soybean yield.…”

Section: Soybean Yieldsupporting

confidence: 88%

“…cultivars that are glyphosate-resistant were introduced in the United States of America in 1995 (Delannay et al 1995) and lines of low corn heat unit (CHU, base 10°C) requirements suitable for regions with a short growing season have recently been introduced to Atlantic Canada. Research in the USA has shown that weed control with glyphosate is affected more by rate than time of application (Ateh and Harvey 1999;Mulugeta and Boerboom 2000;Vangessel et al 2000;Krausz and Young 2001). Sequential applications have provided greater and more consistent weed control than have single applications (Wait et al 1999;Payne and Oliver 2000;Wiesbrook et al 2001).…”

Section: Ivany J a 2004 Comparaison Des Méthodes De Lutte Contre mentioning

confidence: 99%

“…Sequential applications have provided greater and more consistent weed control than have single applications (Wait et al 1999;Payne and Oliver 2000;Wiesbrook et al 2001). However, level of weed control was dependant on time of application of single treatments and on crop row width, with Abbreviations: CHU, corn heat unit 1199 greater control at narrow-row spacings (Ateh and Harvey 1999;Young et al 2001). Soybean yield is affected by level and time of removal of weed competition.…”

Section: Ivany J a 2004 Comparaison Des Méthodes De Lutte Contre mentioning

confidence: 99%

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Comparison of weed control strategies in glyphosateresistant soybean [Glycine max (L.) Merr.] in Atlantic Canada

Ivany¹

2004

Can. J. Plant Sci.

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Island, in 1998 and 1999, we evaluated the effect of time of application of glyphosate and application of selected herbicides, flumetsulam, metolachlor, imazethapyr, metribuzin, and bentazon on weed control and tolerance and yield of three glyphosateresistant soybean cultivars having different maturity ratings. Glyphosate was applied at 0.90 kg ai ha -1 at the first, second or third trifoliate leaf stage, and sequentially at the first and third or second and third trifoliate stages. The sequential treatments of glyphosate resulted in 89 to 100% weed control, and yields achieved with glyphosate applied at the second or third trifoliate stages did not usually differ from sequential treatments. The other selected herbicides did not injure the cultivars and within the group, all treatments resulted in comparable yields. Species that emerge in a single early-season flush were controlled at 6 wk after treatment with glyphosate applied as a single application, but not on a species such as wild radish that have later flushes or emerge throughout the season. Glyphosate applied as a single application at the late second to third trifoliate stage can provide optimum weed control and crop yield with lower herbicide cost than an alternative herbicide treatment.

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Section: Soybean Yieldsupporting

confidence: 88%

Section: Ivany J a 2004 Comparaison Des Méthodes De Lutte Contre mentioning

confidence: 99%

Section: Ivany J a 2004 Comparaison Des Méthodes De Lutte Contre mentioning

confidence: 99%

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Comparison of weed control strategies in glyphosateresistant soybean [Glycine max (L.) Merr.] in Atlantic Canada

Ivany¹

2004

Can. J. Plant Sci.

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“…Entretanto, algumas espécies podem requerer doses mais elevadas e o emprego de aplicações sequenciais, ou ainda, a adição de outro herbicida para que o controle seja satisfatório (ATEH & HARVEY, 1999 (LI et al, 2005).…”

Section: ) No Segundo Experimento O Fator a Constituiu-se De Duas Eunclassified

Suscetibilidade de duas Gramas-boiadeiras a diferentes formulações de glyphosate

et al. 2014

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RESUMO A utilização do herbicida glyphosate para o controle químico das espécies de gramas-boiadeiras nas lavouras orizícolas não tem se mostrado efi ciente. Nesse contexto, a investigação do controle dessas espécies com o glyphosate torna- (zero; 175; 350; 700; 1400; 2800; 5600; 11200; 22400g e.a. ha -1 ). No segundo experimento, o fator A constituiu-se de duas espécies de gramas-boiadeiras (Leersia hexandra e Luziola peruviana), o fator B de três formulações do glyphosate (sal amônio, potássico e isopropilamina) e o fator C de nove doses dos herbicidas (zero; 87,5; 175; 350; 700; 1400; 2800; 5600; 11200g e.a. ha -1 (zero; 175; 350; 700; 1400; 2800; 5600; 11200; 22400g a.e. ha -1 ). In the second experiment, the A factor were two species (Leersia hexandra and Luziola peruviana), the B factor were three formulations of glyphosate (amoniun, potassium e isopropylamine salt) and the C factor were nine doses of herbicides (zero; 87,5; 175; 350; 700; 1400; 2800; 5600; 11200g a.e. ha -1

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“…According to Correia and Duringan (2010), the weed control is directly influenced by the rates of glyphosate. Some species may require higher doses of glyphosate, or sequential applications, addition of another herbicide for more effective control (Ateh and Harvey, 1999). Even with the high number of glyphosate applications, it is clear that persistence of weeds in agricultural areas is very large, among the possible causes we have: the large number of seeds present in the soil bank; the growth during the fallow period and reproduction of species tolerant or resistant to this herbicide.…”

Section: Resultsmentioning

confidence: 99%

Influência do herbicida glyphosate na comunidade de plantas daninhas na região agrícola de Rio Verde, Goiás

Santos

Procópio²,

Silva³

et al. 2015

RBHerbicidas

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-The increasing use of glyphosate in Brazil has increased the selection pressure on species of weeds tolerant and resistant to this herbicide. This study aimed to evaluate the influence of glyphosate use pattern in the population dynamics of weeds in soybeans in thirty-five sampling areas of different properties. These areas were classified as to the number of applications and equivalent amount of glyphosate acid. We used the square-inventory method in thirty-five sampling areas in the 2012/2013 harvest. The structural parameters relative frequency, abundance and value indicator of individuals number and dry weight of shoot were calculated. The graphical representation of the differences of the floristic composition was performed by the non-metric multidimensional scaling technique, with distances of Sorensen. The multi response permutation procedures test was used to test hypotheses of differences in floristic composition. The occurrence of typical species of each treatment was evaluated by the indicator value using the Monte Carlo test (p<0,05). The floristic composition of the number of plants differ between areas using average standards of glyphosate (six applications or 6001 to 8000 g ha -1 of acid equivalent) compared to very low standard areas (four or five applications or 2000 to 4000 g ha -1 of a.i.). The Gnaphalium coarctatum, Eugenia sp., Rumex acetosella and Spermacoce latifolia, Digitaria horizontalis, Urochloa decumbens, Panicum maximum, Gossypum hirsutum and Indigofera hirsuta species showed significant indicator value of environments with different levels of use of glyphosate. Different glyphosate usage patterns exerted influence on the floristic composition of weeds in soybean areas evaluated.

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Annual Weed Control by Glyphosate in Glyphosate-Resistant Soybean (Glycine max)

Cited by 54 publications

References 8 publications

Comparison of weed control strategies in glyphosateresistant soybean [Glycine max (L.) Merr.] in Atlantic Canada

Comparison of weed control strategies in glyphosateresistant soybean [Glycine max (L.) Merr.] in Atlantic Canada

Suscetibilidade de duas Gramas-boiadeiras a diferentes formulações de glyphosate

Influência do herbicida glyphosate na comunidade de plantas daninhas na região agrícola de Rio Verde, Goiás

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