EFEITOS DE HERBICIDAS NA BIOMASSA E NODULAÇÃO DO FEIJÃO-CAUPI INOCULADO COM RIZÓBIO

FABIO PINTO DOS REIS MONTEIRO; ALOISIO FREITAS CHAGAS JUNIOR; MARCELO RODRIGUES REIS; GIL RODRIGUES DOS SANTOS; LILLIAN FRANÇA BORGES CHAGAS

EFEITOS DE HERBICIDAS NA BIOMASSA E NODULAÇÃO DO FEIJÃO-CAUPI INOCULADO COM RIZÓBIO

2012

FABIO PINTO DOS REIS MONTEIRO | ALOISIO FREITAS CHAGAS JUNIOR | MARCELO RODRIGUES REIS | GIL RODRIGUES DOS SANTOS | LILLIAN FRANÇA BORGES CHAGAS

This paper aimed to evaluate the effects of herbicides on the biomass and nodulation ofcowpea. The experiment was conducted in greenhouse, in experimental design with randomized blocks, in factorial arrangement 4x2 + 2, corresponding applications of the herbicide bentazon, clethodim, fomesafen and smetolachlor, the recommended dose (RD) and recommended twice (RDA) in four periods of development of cowpea (20, 30, 45 and 55 days after planting, DAP). An inoculated control treatment without herbicide application and a control without inoculation, no application of herbicide and nitrogen fertilizer were included. Inoculation was performed with the strains INPA UFLA 03-11B and 03-84. The results showed for the experiment in a greenhouse that bentazon and clethodim, both at the recommended dose and double dose, provide low phytotoxicity to cowpea and has little influence on nodulation and crop biomass. The herbicide smetalochlor presents high degree of phytotoxicity in cowpea, completely inhibits the vegetative growth when applied at twice the recommended dose.

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