SELECTIVITY OF METRIBUZIN IN POSTEMERGENCE OF CULTURE OF CARROT

Sociedade Brasileira da Ciencia das Plantas Daninhas

SILVA, G.S.¹  SILVA, D.V.²  CARNEIRO, G.D.O. PESSOA²  REIS, M.R.³  BARBOSA, A.R.³ 

[1] USP, Piracicaba, Brazil;Universidade Federal Rural do Semi-Árido, Mossoró, Brazil;Universidade Federal de Viçosa, Rio Paranaíba, Brazil

关键词: Daucus carota;    chemical control;    herbicide.;   

DOI  :  10.1590/s0100-83582017350100036

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 initial slow growth and short stature of carrot can allow that weeds settle in crop areas, requiring the management of these plants for productivity not to decrease. Nevertheless, weeds control has been difficult because there are few herbicides available for weeds control in postemergence of carrots. Two experiments in the field were carried out to evaluate selectivity of metribuzin applied in postemergence of carrots. A experimental randomized block design was utilized with four repetitions. Treatments consisted of metribuzin doses (0, 144, 288, 432, 576, 720, 960 and 1,200 g ha-1), applied in postemergence of carrots of the Nantes variety. Roots productivity was evaluated and percentage of commercial roots and no-commercial roots was calculated. Metribuzin has not caused visual symptoms of intoxication in carrots. Doses lower than 432 g ha-1 of metribuzin do not reduce the total productivity of roots, independent of the application period. Any doses of metribuzin changed the percentage of commercial and noncommercial roots. It is concluded that metribuzin is selective for carrots of the Nantes variety in postemergence applications at doses of 432 g ha-1.

【 授权许可】

CC BY