Herbicidas alternativos no controle de Bidens pilosa e Euphorbia heterophylla resistentes a inibidores de ALS na cultura do algodão

Revista Brasileira de Herbicidas

Hudson Kagueyama Takano¹  Jamil Constantin¹  Rubem Silvério Oliveira Jr.¹  Alessandra Francischini Constantin¹  Hugo Almeida Dan¹  Guilherme Braga Pereira Braz¹  Antonio Mendes Oliveira Neto¹  Gizelly Santos¹ 

[1] Universidade Estadual de Maringá (UEM)

关键词: Picão-preto;    leiteiro;    acetolactato sintase;   

DOI  :  

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 presence ofBidens pilosaandEuphorbia heterophyllaresistant to ALS inhibitors is a problem to weed management in cotton crop, due to the fact that few alternatives broadleaf selective herbicides area available. In order to supply this information gap, four experiments were established in greenhouse conditions with the objective of evaluating herbicides applied in post-emergence conditions, recommended either for conventional and transgenic cotton (resistant to glyphosate and amonio-glufosinate) for controlling these resistant biotypes. The experimental design was entirely randomized with four replications and 21 herbicides treatments, besides a check without herbicide application. Two experiments were conducted per species, where the first one corresponded to herbicides application in stages of two to four leaves, and the second in the stage of four to six. It was evaluated the percentage of control at 7 and 28 days after herbicide application. Amonio-glufosinate and glyphosate applied isolated or in combinations with other herbicides were effective in controllingB. pilosaindependently of the growth stage. The two biotypes demonstrated to be highly resistant to ALS inhibitor herbicides.E. heterophyllashowed greater sensitivity to herbicide amonio-glufosinate herbicide and glyphosate in early stages applications. Glyphosate stood out as a satisfactory alternative for controllingE. heterophylla . For this biotype, synergistic effect was verified for associations between amonio-glufosinate and pyrithiobac-sodium.

【 授权许可】

Unknown