Taxas de aplicação e herbicidas no controle de plantas daninhas em pastagem

Revista Brasileira de Herbicidas

Fábio Henrique Krenchinski¹ 

[1] Universidade Federal do Paraná - Campus Palotina

关键词: tecnologia de pulverização;    carrapicho-beiço-de-boi;    assa-peixe;    grama-estrela-africana;    seletividade;   

DOI  :  10.7824/rbh.v14i4.435

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 】

Pastures formed withCynodonn lemfuensisVanderyst are excellent alternatives for feeding livestock. The competition from weeds can cause damage to pasture, andVernonia polyanthesandDesmodium incanumare among the main competing species. The objective of this study was to evaluate the efficacy of different herbicides to controlVernonia polyanthesandDesmodium incanum , applied in high and low spray mix volumes. The experiment was established in an area formed for over 10 years by African stargrass ( Cynodonn lemfuensis ). The experimental design was a randomized block in a 2x7 factorial arrangement with two spray mix volumes of 50 and 200 L ha -1and seven herbicides. Variables phytotoxicity on grassCynodonn lemfuensisat 3, 7, 14, 21 and 28 days after application (DAA) and control of weed plantsVernonia polyanthesandDesmodium incanumat 7, 14, 21 and 28 DAA were evaluated. There were no high levels of phytotoxicity in the pasture. The treatments that provided the best controls ofVernonia polyanthesandDesmodium incanum  were fluroxypyr-meptyl + triclopyr, 2,4 D + aminopyralid and 2,4 D + picloram. Spray mix volumes provided no significant differences in the evaluation of control after 28 DAA for herbicides, but were higher for some treatments at 7, 14 and 21 DAA. Thus, the lowest volume of spray mix (50 L ha -1 ) becomes a viable alternative in the control of these species in the pasture.

【 授权许可】

CC BY