Selectivity of metolachlor and alachlor for the "carioca" bean

Planta Daninha

Universidade Federal de Santa Maria, Frederico Westphalen¹  Kaspary, T.E¹  Universidade Tecnológica Federal do Paraná¹  Vidal, R.A¹  Lamego, F.P¹  Universidade Federal do Rio Grande do Sul¹  Gallon, M¹  Ruchel, Q¹  Trezzi, M.M¹  Santi, A.L¹  UFSM¹  Basso, C.J¹ 

关键词: alachlor;    S-metolachlor;    Digitaria sanguinalis;    phytotoxicity;    yield components.;   

DOI  :  10.1590/S0100-83582011000400018

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

The common bean is a culture with a short vegetative cycle, highly susceptible to weed interference. The objective of this work was to evaluate the efficacy of herbicides applied in pre emergence for Digitaria sanguinalis control in "Carioca" bean crop, as well as to determine their selectivity to the crop. The treatments evaluated were: S-metolachlor (960; 1,440 and 1,920 g ha-1), alachlor (1,440; 1,920 and 2,400 g ha-1), and two untreated checks without herbicide application (with and without hoeing control). Visual evaluations of control for D. sanguinalis and injury to the common bean plants were conducted at 20 and 40 days after emergence (DAE). At all the evaluated rates, the herbicides were efficient in D. sanguinalis control. At 40 DAE, injury to the common bean was observed in the plots sprayed with S-metolachlor at the highest rates, but without deleterious effect on the crop grain yield. Despite being efficient in D. sanguinalis management, alachlor caused phytotoxicity to the "Carioca" common bean, reducing crop yield up to 47%.

【 授权许可】

Unknown