Digitaria horizontalis control by the herbicides glyphosate, sulfosate and potassium glifosate under different post-application rainfall intervals

Planta Daninha

Ferreira, L.R.¹  Jakelaitis, A.¹  Miranda, G.V.¹  Universidade Federal de Viçosa¹  UFV, Viçosa¹  Silva, A.A.¹ 

关键词: formulations;    phytotoxic;    glyphosate SL;    glyphosate WG.;   

DOI  :  10.1590/S0100-83582001000200017

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 effectiveness of sulfosate, potassium glyphosate and different glyphosate formulations on Digitaria horizontalis was evaluated when the products were applied in post emergence conditions and the plants were submitted to 20 mm simulated rainfall during 50 minutes, at intervals of 1, 2, 4 and 6 hr after herbicide application. The experiment was carried out under greenhouse conditions from January to April 2000, in Viçosa, Minas Gerais, Brazil, arranged in a split split-plot randomized block design with four replications. The phytotoxic effect of the herbicides on D. horizontalis was evaluated at 3, 7, 14, 21 and 28 DAA (days after application). At 45 DAA, the shoot dry biomass was compared to the control (without herbicide). No differences were observed among potassium glyphosate, sulfosate and glyphosate formulations (Roundup Transorb®) for similar application conditions. These treatments provided lower regrowth of D. horizontalis, when the interval without rain following application was of 46 hr. Glyphosate SL and WG formulations were the most affected by rainfall in all the intervals evaluated, when compared to other herbicide treatments.

【 授权许可】

Unknown