Growth of arabica coffee cultivars submitted to glyphosate doses

Planta Daninha

Universidade Federal dos Vales do Jequitinhonha e Mucurí, Diamantina¹  Freitas, M.A.M.¹  USP¹  Fialho, C.M.T.¹  Universidade Federal de Viçosa, Viçosa¹  França, A.C.¹  Reis, M.R.¹  Universidade Federal do Pampa¹  Victoria Filho, R.¹  Universidade Federal de Viçosa¹  Galon, L.¹  Silva, A.A.¹ 

关键词: Coffea arabica;    drift;    EPSPs;    herbicide;    selectivity.;   

DOI  :  10.1590/S0100-83582010000300017

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 】

This study evaluated the effects of glyphosate on the growth of three arabica coffee cultivars. A factorial (3 x 5) was arranged in a randomized block design with four replications, with treatments consisting of three coffee varieties: Catucaí Amarelo (2 SL), Oeiras (MG-6851) and Topázio (MG-1190) and five glyphosate doses (0, 57.6, 115.2, 230.4 and 460.8  g  ha-1 ). The herbicide was applied when the coffee plants reached 21 pairs of leaves, before reaching their upper third ones. At 45 and 120 days after glyphosate application (DAA), increase in leaf area, stem diameter, number of leaves and plagiotropic branches was evaluated, being initially measured on the day the herbicide was applied, and plant intoxication rate at 10, 45 and 120 DAA. Dry matter of leaves, roots and stem, and root length and density were measured at 120 DAA. Symptoms of coffee plant intoxication caused by glyphosate were similar in different cultivars, being characterized by chlorosis and leaf narrowing. Increase in the number of leaves, plagiotropic branches and stem diameter, regardless of the cultivar, was not affected by glyphosate. Cultivar Topázio was the most sensitive to glyphosate, in terms of accumulation of leaf area, root dry matter and root density.

【 授权许可】

Unknown