Herbicide efficacy, leaf structure, and spray droplet contact angle among<i>Ipomoea</i>species and smallflower morningglory

Chachalis, Demosthenis; Reddy, Krishna N.; Elmore, C. Dennis; Steele, Marcus L.

doi:10.1614/0043-1745(2001)049[0628:helsas]2.0.co;2

Cited by 79 publications

(71 citation statements)

References 19 publications

(29 reference statements)

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“…Differences in the response of plants to the exposure to glyphosate can be derived from differences in spray retention or/and drop contact angle in the leaves (Chachalis et al, 2001), (Norsworthy et al, 2001;Michitte et al, 2007), composition of the leaf epicuticular wax (Michitte et al, 2004;Nandula et al, 2008;Guimarães et al, 2009;Hatterman-Valenti et al, 2011), herbicide absorption or/and translocation (Dinelli et al, 2008;Guimarães et al, 2009;Ge et al, 2010;Carvalho et al, 2012b), and herbicide degradation (RojanoDelgado et al, 2010(RojanoDelgado et al, , 2012Carvalho et al, 2012bCarvalho et al, , 2013b. Thus, any difference in the herbicide absorption, translocation, or/and metabolism can influence the plant response to glyphosate, culminating in a higher or lower susceptibility to this herbicide.…”

Section: Resultsmentioning

confidence: 99%

Plant Growth Responses of Apple and Pear Trees to Doses of Glyphosate

et al. 2016

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-Glyphosate is commonly used for intra-row weed management in perennial plantations, where unintended crop exposure to this herbicide can cause growth reduction. The objective of this research was to analyze the initial plant growth behavior of young apple and pear plants exposed to glyphosate. Glyphosate was sprayed on 2-year-old 'Gala' apple and 'Abbè Fetel' pear plants at doses from 18 to 720 g per hectare of acid equivalent (a.e.). The plant height of neither species was not significantly reduced (less than 1%) by any glyphosate dose at 240 days after spraying, whereas the stem diameter and the dry mass of stem and leaves were reduced by 720 g a.e. ha -1 . The glyphosate dose required to reduce the aboveground dry mass by 50% was 162 and 148 g a.e. ha -1 for apple and pear, respectively. Aboveground dry mass was reduced 2% and 6% for apple and pear plants, respectively, at 720 g a.e. ha -1 . Hormesis was not observed in either species at doses down to 18 g a.e. ha -1 . Both species showed low susceptibility to glyphosate; however apple was less susceptible than pear. Keywords: N-phosphonomethyl-glycine, Malus domestica, Pyrus communis, spray drift. RESUMO -Glyphosate é comumente usado para manejo de plantas daninhas na linha de plantio de culturas perenes, onde a exposição não intencional da cultura a esse herbicida pode causar redução do crescimento. O objetivo desta pesquisa foi analisar o comportamento do crescimento inicial de

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Section: Resultsmentioning

confidence: 99%

Plant Growth Responses of Apple and Pear Trees to Doses of Glyphosate

et al. 2016

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“…Differences in the response of plants to the exposure to glyphosate can be derived from differences in spray retention (NORSWORTHY et al, 2001;MICHITTE et al, 2007) or/and drop contact angle (CHACHALIS et al, 2001;NORSWORTHY et al, 2001;MICHITTE et al, 2007) in the leaves, composition of the leaf epicuticular wax (MICHITTE et al, 2004;NANDULA et al, 2008;GUIMARÃES et al, 2009;HATTERMAN-VALENTI et al, 2011), herbicide absorption or/and translocation (DINELLI et al, 2008;GUIMARÃES et al, 2009;GE et al, 2010;CARVALHO et al, 2012b), and herbicide degradation (ROJANO-DELGADO et al, 2010, 2012CARVALHO et al, 2012bCARVALHO et al, , 2013b. Thus, any difference in the herbicide absorption, translocation, or/and metabolism can influence the plant response to glyphosate, culminating in a higher or lower tolerance to this herbicide.…”

Section: Figura 4 -Massa Seca Da Parte Aérea De Quatro Clones De Eucamentioning

confidence: 99%

Differential Response of Clones of Eucalypt to Glyphosate1

2015

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-Weed control is commonly performed by the inter-row mechanical weeding associated to intrarow glyphosate directed spraying, causing a risk for drift or accidental herbicide application, that can affect the crop of interest. The objective was to evaluate the response of clones C219, GG100, I144, and I224 of eucalypt (Eucalyptus grandis x E. urophylla) to glyphosate doses of 0, 18, 36, 72, 180, 360, and 720 g of acid equivalent per hectare. The clones showed different growth patterns with regard to height, leaf number, stem dry weight, relative growth rate, net assimilation rate, and relative leaf growth rate. The clones I144 and GG100 were more susceptible to glyphosate, showing the doses required to reduce dry weight by 50% of 113.4 and 119.6 g acid equivalent per hectare, respectively. The clones C219 and I224 were less susceptible to glyphosate, showing the doses required to reduce dry weight by 50% of 237.5 and 313.5 g acid equivalent per hectare, respectively. Eucalyptus clones respond differently to glyphosate exposure, so that among I224, C219, GG100, and I144, the susceptibility to the herbicide is increasing.Keywords: Eucalyptus; N-(phosphonomethyl)-glycine; Spray drift. de 0, 18, 36, 72, 180, 360 RESPOSTA DIFERENCIAL DE CLONES DE EUCALIPTO A GLYPHOSATE RESUMO -O controle de plantas daninhas é comumente feito com roçadas na entrelinha associada a aplicações dirigidas de glyphosate na linha de plantio de culturas arbóreas, acarretando risco de deriva ou aplicação acidental do herbicida, que pode afetar a cultura de interesse. O objetivo foi avaliar a resposta dos clones C219, GG100, I144 e I224 de eucalipto (Eucalyptus grandis x E. urophylla) a doses de glyphosate

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“…It should be noted that a high amount of epicuticular wax may be characterized in some species as an effective barrier to the absorption of herbicides (CHACHALIS et al, 2001b). However, weeds with a high stomatal density in their leaves may present relatively high levels of herbicide uptake (HUANGFU et al, 2007).…”

Section: Resultsmentioning

confidence: 99%

Action of rain on formulations of glyphosate mixed with saflufenacil for the control of Brachiaria decumbens

et al. 2018

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RESUMO:O objetivo do trabalho foi avaliar a ocorrência de chuvas na eficiência de diferentes formulações de glyphosate aplicadas de forma isolada e em mistura com o saflufenacil, sobre o controle de Brachiaria decumbens. O estudo foi realizado no primeiro semestre de 2013. Os tratamentos constaram da aplicação isolada de três formulações de glyphosate (Roundup Original, Roundup Transorb R e Roundup WG) a 1.080 g e.a. ha -1 e em mistura com o saflufenacil a 24,5 g i.a. ha -1 + Dash a 0,5% v/v e, seis intervalos de tempo para simulação da chuva: 15; 30; 60; 120; 240 e 360 minutos após a aplicação dos herbicidas e uma testemunha sem chuva. Foram realizadas avaliações visuais de controle das plantas aos 4; 7; 14; 21 e 28 dias após a aplicação dos herbicidas. A mistura de saflufenacil + Dash às formulações de Roundup original, Roundup transorb R e Roundup WG aumentaram a velocidade de controle das plantas de B. decumbens, independente do intervalo de chuva estudado. As formulações de glyphosate (Roundup Transorb R e Roundup WG) aplicados isolados foram afetadas por chuvas que ocorreram logo após a pulverização e quando em mistura com saflufenacil + Dash observou-se efeito sinérgico no controle das plantas daninhas. PALAVRAS-CHAVE:Brachiaria; eficácia; herbicida; plantas daninhas. ABSTRACT:This study aimed to evaluate the effects of rain on the efficiency of different formulations of glyphosate applied in isolation and in combination with saflufenacil on the control of Brachiaria decumbens. This study was conducted during the first half of 2013. The treatments consisted of an isolated application of three formulations of glyphosate (Roundup Original, Roundup Transorb R, and Roundup WG) at 1,080 g a.e. ha -1 and mixed with saflufenacil at 24.5 g a.e. ha -1 + Dash at 0.5% v/v at six time intervals of simulated rain: 15, 30, 60, 120, 240 and 360 minutes after application of herbicides and a control treatment without rain. We performed visual evaluations of plant control at 4, 7, 14, 21 and 28 days after application of herbicides. The mixture of saflufenacil + Dash with the original Roundup formulations, Roundup Transorb R and Roundup WG increased the control speed of B. decumbens plants regardless of the rain interval studied. The formulations of glyphosate (Roundup Transorb R and Roundup WG) applied in isolation were affected by rains that occurred shortly after spraying. In combination with saflufenacil + Dash, there was a synergistic effect on weed control.

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Herbicide efficacy, leaf structure, and spray droplet contact angle amongIpomoeaspecies and smallflower morningglory

Cited by 79 publications

References 19 publications

Plant Growth Responses of Apple and Pear Trees to Doses of Glyphosate

Plant Growth Responses of Apple and Pear Trees to Doses of Glyphosate

Differential Response of Clones of Eucalypt to Glyphosate1

Action of rain on formulations of glyphosate mixed with saflufenacil for the control of Brachiaria decumbens

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