Developmental stages and contact and absorption of herbicides in the inviability of Cyperus rotundus tubers

Planta Daninha

Correia, N.M.¹  Durigan, J.C.¹  Universidade Estadual Paulista¹  Timossi, P.C.¹ 

关键词: Cyperus rotundus biology;    trifloxysulfuron-sodium + ametrine;    halosulfuron;    sulfentrazone;    imazapic;    glyphosate.;   

DOI  :  10.1590/S0100-83582005000400009

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 】

Herbicides that eliminate purple nutsedge (Cyperus rotundus) tubers either absorbed from leaves or directly from the soil solution, guarantee a better performance of gradual disinfestation of the area. This research was carried out to evaluate the most adequate growing stages for post-emergence herbicide application, and the possibility of action of the main herbicides against purple nutsedge tubers when applied to shoots, soil and both. Two experiments were conducted under greenhouse conditions at the Crop Protection Department of the Universidadse de Estadual Paulista (UNESP), Jaboticabal, Brazil. Results of the first experiment showed that all herbicides (trifloxysulfuron-sodium + ametrine, halosulfuron, sulfentrazone and imazapic) resulted in significant reductions in the amounts of viable tubers, in accordance with their modes of action and application recommendations. In the second experiment, the highest percentages of affected tubers, sequentially after the original and derived epigeal emersions, were obtained with the application of trifloxysulfuron-sodium + ametrine at the nutsedge stages "young" and pre-flowering, halosulfuron at the "young" stage and glyphosate at the pre-flowering stage.

【 授权许可】

Unknown