Title:	Selectivity of Chlorimuron-Ethyl to Castorbean Crops.
Authors:	MACIEL, C. D. G. LUSTOSA, S. B. C. COSTA, A. G. F. RIBEIRO, R. B. MATIAS, J. P.
Affiliation:	C.D.G. MACIEL, UNICENTRO - GUARAPUAVA; S. B. C. LUSTOSA, UNICENTRO- GUARAPUAVA; AUGUSTO GUERREIRO FONTOURA COSTA, CNPA; R. B. RIBEIRO, ESCOLA SUPERIOR DE AGRONOMIA DE PARAGUAÇU PAULISTA; J. P. MATIAS, UNIVERSIDADE ESTADUAL DE MARINGÁ, PAG/UEM.
Date Issued:	2017
Citation:	Planta daninha, v. 35, e017165959, 2017.
Description:	Castorbean presents high sensitivity to competition; therefore, it is necessary to develop alternatives for the weed management, mainly for the chemical control of eudicotyledons species. The goal of this work was to evaluate the selectivity of chlorimuron-ethyl to castorbean crops in different development stages. Four experiments differentiated by the genetic material were conducted: Lyra, Íris and Savana hybrids and AL Guarany 2002 cultivar. The treatments corresponded to the application conditions of chlorimuron-ethyl [sample control with no application, doses of 15 e 20 g a.i. ha-1 with the formulations Classic? and Clorimuron Master Nortox?] in two phenological crop stages (4 to 5 and 7 to 8 true leaf stages). The experimental design was in randomized blocks with four replications, in a factorial scheme of 5 x 2 (herbicide and application stage). The intoxication was more severe for the 7 to 8 leaf stage and with the dose of 20 g ha-1 on day 7 days after application (DAA); there were plant recovery and mild symptoms on day 21 DAA, especially for the 4 to 5 leaf stage. The yield was reduced with the 20 g ha-1 dose for Lyra hybrid with both formulations and for Savana castorbean, only with the Classic? formulation. The chlorimuron-ethyl herbicide, at 15 g ha-1, showed selectivity to castorbean, regardless of the stage application (4 to 5 or 7 to 8 leaves).
Thesagro:	Ricinus communis Mamona Intoxicação Herbicida
NAL Thesaurus:	Crops Herbicides
Keywords:	Intoxication
DOI:	10.1590/S0100-83582017350100077
Notes:	Publicação online.
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPA)