2022
DOI: 10.5965/223811712122022085
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Fitotoxicidade de subdoses do herbicida dicamba quando aplicado em pré-emergência da cultura da soja não-tolerante

Abstract: As cultivares transgênicas de soja oferecem novas alternativas para a elaboração de programas de manejo de plantas daninhas, pois permitem a aplicação de herbicidas anteriormente considerados não seletivos à cultura, dentre estes, o herbicida dicamba. No entanto, é sabido que as cultivares não tolerantes são extremamente sensíveis a esse herbicida, de modo que a presença do mesmo na área, por consequência de deriva de outras áreas ou limpeza incorreta de tanque, pode promover injúrias à cultura. Assim, este tr… Show more

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Cited by 3 publications
(6 citation statements)
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“…Dicamba is an auxin-mimicking herbicide and, as such, its presence impacts several plant physiological processes naturally sensitive to auxin hormones, such as plant growth, meristematic differentiations, leaf deformations, and calluses in stems. Some of these manifestations were present in coffee seedlings at a lower intensity than is commonly observed in more sensitive crops, such as genetically modified soybean (COSTA, 2019;CARVALHO et al, 2022). In general, it is possible that coffee is less sensitive to the dicamba molecule due to its metabolic response to the herbicide presence (detoxification), or even due to lower rates of herbicide absorption and translocation in coffee plant tissues, which culminated in a lower general manifestation of symptoms.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…Dicamba is an auxin-mimicking herbicide and, as such, its presence impacts several plant physiological processes naturally sensitive to auxin hormones, such as plant growth, meristematic differentiations, leaf deformations, and calluses in stems. Some of these manifestations were present in coffee seedlings at a lower intensity than is commonly observed in more sensitive crops, such as genetically modified soybean (COSTA, 2019;CARVALHO et al, 2022). In general, it is possible that coffee is less sensitive to the dicamba molecule due to its metabolic response to the herbicide presence (detoxification), or even due to lower rates of herbicide absorption and translocation in coffee plant tissues, which culminated in a lower general manifestation of symptoms.…”
Section: Resultsmentioning
confidence: 99%
“…Auxin herbicides act similarly to indoleacetic acid (IAA); however, they are more persistent and more active, causing damage to more sensitive crops even at very low concentrations (OLIVEIRA JÚNIOR, 2011;CARVALHO et al, 2022). Even at low doses, auxin herbicides present great efficacy in the control of broadleaf weeds.…”
Section: Introductionmentioning
confidence: 99%
“…According to Griffin et al (2013), soybean crops are 2.5-fold more susceptible to toxicity during the flowering stage than during vegetative stages. Thus, the developmental crop stage at which toxicity occurs is an important factor for the manifestation of injury symptoms and yield changes (Costa et al, 2020b;Carvalho et al, 2022). Regarding auxin herbicides, soybean plants have shown more susceptibility to dicamba than to 2,4-D (Egan et al, 2014;Solomon and Bradley, 2014;Silva et al, 2018;Costa et al, 2020b), which denotes the need for especial attention to this molecule.…”
Section: Areamentioning
confidence: 99%
“…A viable strategy for managing these weeds is the use of soybean cultivars tolerant to different herbicides, mainly broadleaf herbicides, for example, the cultivar tolerant to dicamba (Spaunhorst et al, 2014) approved by the CTNBio (CTNBio, 2016) and released in the 2021-2022 crop season. Considering the several cases of horseweed resistance to glyphosate in Brazil (Mendes et al, 2021), large use of dicamba in agricultural areas is expected as an important alternative for the management of this weed (Osipe et al, 2017;Carvalho et al, 2022).…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation