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- Title
Suscetibilidade de duas Gramas-boiadeiras a diferentes formulações de glyphosate.
- Authors
Scherner, Ananda; de Avila, Luis Antonio; Schreiber, Fábio; Kruse, Nelson Diehl; Agostinetto, Dirceu; Pinto, Jesus Juares Oliveira; Pestana, Rodrigo Ribeiro
- Abstract
The use of glyphosate to chemical control of Cutgrass and Peruvian Watergrass with the use of non-selective herbicides has not been efficient. In this context, the investigation of chemical control of these species to glyphosate is very important, since there are not available commercially selective herbicides to control these species in post-emergence of irrigated rice. Therefore, the objective of this study was to evaluate the susceptibility of Cutgrass and Peruvian Watergrass to different formulations of glyphosate. Two factorial experiments were conducted in a greenhouse, in the first the A factor were two formulations of glyhposate (potassium and isopropylamine salt) and the B factor were nine doses of the herbicide (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). Based on the results obtained, it was observed that these species exhibit differential susceptibility to glyphosate. Moreover, Leersia hexandra was more sensitive when compared to Luziola peruviana. Glyphosate formulation infl uenced control efficiency, where Transorb Roundup R® and Roundup Ultra® provided the best control of the two species.
- Subjects
CHARA vulgaris; GRASSES; GLYPHOSATE; IRRIGATION; WEED control
- Publication
Ciência Rural, 2014, Vol 44, Issue 3, p400
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/S0103-84782014000300003