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Quality of cotton seeds from plants submitted to reduced rates of glyphosate

This work aimed to evaluate the influence of cotton plant treatment using reduced rates of glyphosate, simulating drift, on the quality of the seeds produced. The plants of the ITA-90 and BRS-Facual cultivars were treated at two different development stages (4 and 10 leaves) with glyphosate in the doses of 0; 180 and 360 g ha-1 ea. Cotton crop yield was evaluated. The material was seeded and seed quality evaluated, through mass of 100 seeds, emergence percentage and mass of plantules. There was a reduction in cotton production in the treatments, except in older plants treated with 180 g ha-1. No significant difference in plantule emergence was found in the different treatments.

Gossypium hirsutum; emergence; drift; toxicity

Sociedade Brasileira da Ciência das Plantas Daninhas Departamento de Fitotecnia - DFT, Universidade Federal de Viçosa - UFV, 36570-000 - Viçosa-MG - Brasil, Tel./Fax::(+55 31) 3899-2611 - Viçosa - MG - Brazil