Selectivity of chemical weed control systems in conventional cotton

Planta Daninha

Arantes, J.G.Z.¹  Braz, G.B.P.¹  Faculdade Integrado, Campo Mourão, Brazil¹  Brugnera, P.¹  Universidade Estadual de Maringá, Maringá, Brazil¹  Constantin, J.¹  Barbosa, C.A.S.¹  Oliveira Neto, A.M.¹  Universidade de Cuiabá, Primavera do Leste, Brazil¹  Gemelli, A.¹  Oliveira Jr., R.S.¹  Círculo Verde Agronomic Consultancy & Research, Magalhães, Brazil¹ 

关键词: Gossypium hirsutum;    application modalities;    tank mixture.;   

DOI  :  10.1590/S0100-83582014000400018

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 】

Cotton is highly susceptible to the interference imposed by weed community, being therefore essential to adopt control measures ensuring the crop yield. Herbicides are the primary method of weed control in large-scale areas of production, and usually more than one herbicide application is necessary due to the extensive crop cycle. This study aimed to evaluate the selectivity of different chemical weed control systems for conventional cotton. The experiment took place in the field in a randomized block design, with twenty nine treatments and four replications in a split plot layout (adjacent double check). Results showed that triple mixtures in pre-emergence increased the chance of observing reductions in the cotton yield. To avoid reductions in crop yield, users should proceed to a maximum mixture of two herbicides in pre-emergence, followed by S-metolachlor over the top, followed by one post-emergence mixture application of pyrithiobac-sodium + trifloxysulfuron-sodium.

【 授权许可】

Unknown