Affiliation:
1. Embrapa Cerrados, Brazil
2. Corteva Agriscience, Brazil
3. Universidade de São Paulo, Brazil
Abstract
Abstract: The objective of this work was to evaluate the sensitivity of different populations of Digitaria insularis to the glyphosate, clethodim, and haloxyfop-P-methyl herbicides, in agricultural areas, and to develop infestation maps based on the responses of these populations. One hundred sixty-one populations suspected of being resistant were evaluated and compared to a susceptible population. When plants displayed three to four tillers, the populations were sprayed with glyphosate (1,000 g ha-1 a.e.), clethodim (108 g ha-1 a.i. + 0.5% mineral oil), and haloxyfop-P-methyl (62.35 g ha-1 a.i. + 0.5% mineral oil); plants without herbicide application were used as the control. The plant populations were classified as susceptible, intermediately resistant (with susceptible and resistant plants), or resistant to the tested herbicides. All populations were susceptible to clethodim; 97.5% were susceptible and 2.5% were intermediately resistant to haloxyfop-P-methyl; and 9.9% were susceptible, 21.1% intermediately resistant, and 68.9% resistant to glyphosate. Glyphosate-resistant populations are homogeneously distributed throughout the evaluated regions. There are no cases of D. insularis multiple resistance in the sampled regions; however, cross-resistance to glyphosate and haloxyfop-P-methyl was detected.
Subject
Agronomy and Crop Science,Animal Science and Zoology
Reference21 articles.
1. Impacto no bolso;ADEGAS F.S.;Cultivar: Grandes Culturas,2018
2. Manejo químico de capim-amargoso resistente a glyphosate na pré-semeadura da soja;CARPEJANI M. da S.;Campo Digital: Revista Ciências Exatas e da Terra e Ciências Agrárias,2013
3. Aspectos de resistência de plantas daninhas a herbicidas;CHRISTOFFOLETI P.J.,2008
4. Características biológicas de Digitaria insularis que conferem sua resistência à herbicidas e opções de manejo;GAZOLA T.;Científica,2016
5. Estimating yield losses in soybean due to sourgrass interference;GAZZIERO D.L.P.;Planta Daninha,2019
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