Antagonism with glyphosate and triazine combinations

Planta Daninha

Hernandes, G.C.¹  Machry, M.¹  Universidade Federal do Rio Grande do Sul¹  Vidal, R.A.¹  Universidade Federal do Rio Grande do Sul, Porto Alegre¹  Fleck, N.G.¹ 

关键词: no-tillage;    Sorghum bicolor;    mixture;    atrazine;    simazine.;   

DOI  :  10.1590/S0100-83582003000200016

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 no-tillage system requires herbicide spraying before planting to eliminate the existing weeds in the area and residual herbicides to prevent new weed infestation during the crop cycle. Farmers tend to spray both groups of herbicide simultaneously to reduce costs and application time. The objective of this work was to verify the compatibility of glyphosate and triazine as a tank mix. An experiment was conducted under field conditions during the 2001-2002 growing season, using sorghum as a model to evaluate the herbicide mixture compatibility. Sorghum hibrid Dekalb 865 was planted in November 2001 and the treatments were sprayed 60 days after planting, when the plants were 100 cm tall and at the boot stage. Treatments consisted of glyphosate at 540, 720 and 900 g ha-1, sprayed alone or in mixture with simazine + atrazine (Primatop SC) at 1750 + 1750 g ha-1. Treatments also included an untreated control and the residual herbicides used alone. The results of plant control and chlorophyll content indicated a severe antagonism in the glyphosate and triazine combination. Herbicide antagonism reduced with increment of glyphosate rate or at late assessment periods.

【 授权许可】

Unknown