Manejo de cordas-de-violas (Ipomea hederifolia, Ipomea nil e Merremia aegyptia) com herbicidas em cana crua na época seca

Revista Brasileira de Herbicidas

Roberto Estevão Bragion Toledo¹ 

[1]ESALQ-USP

关键词: plantas daninhas;    cana-de-açúcar;    controle;    seletividade;    palha;   

DOI  :  10.7824/rbh.v16i2.453

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 present research was carried out in a raw ratoon cane area located in Bocaina, SP, with cultivar RB85-5156, planted with a space of 1.4 m between the rows, on a sandy soil, with the objective of studying management alternatives with herbicides applied in the pre-emergence period during the dry season, adopting the randomized blocs design with four replications. In order to apply the herbicides, a CO 2pressurized backpack sprayer was used, with a constant pressure of 200 kgf. -2and a reservoir with capacity for 2 L of solution, connected to a bar equipped with 6 spray nozzles model DG110.02, with a space of 0.5 m among each, providing an application rate of 200 L ha -1 . The evaluations of weed control and phytotoxicity of the herbicides in the crops of sugarcane were done at 30, 60, 90 and 120 DAA. The data went through a variance analysis by the F test and the means were compared by the Tukey test at a 5% probability level. Herbicides diuron + hexazinone + sulfometuron-methyl, amicarbazone, amicarbazone + isoxaflutole, sulfentrazone, imazapic, and tebuthiuron + isoxaflutole can be considered alternatives to the efficient control of different species of morning glory ( Ipomoea hederifolia, Ipomoea quamoclitandMerremia aegyptia)when applied to raw sugarcane during the dry season on sandy clay soils (medium texture). Regarding selectivity of the sugarcane crop, there were no significant phytotoxicity symptoms observed on the herbicides when applied in total pre-emergence until 120 DAA.

【 授权许可】

CC BY