Cowpea yield and quality after application of desiccating herbicides

Rendimento e qualidade de sementes de feijão-caupi após a aplicação de herbicidas dessecantes

Jeovane Nascimento Silva Estevam Matheus Costa Leandro Spíndola Pereira Elaine Cristina Zuquetti Gonçalves Jacson Zuchi Adriano Jakelaitis About the authors

Abstract:

The aim of this study was to evaluate the effects of pre-harvest desiccant herbicides on the yield and the physiological and technological quality of cowpea seeds after harvest and after storage. The experiment was conducted in a randomized block design with four replications. A split-plot design (6 × 2) was composed of the desiccant herbicides flumioxazin (30 g ai.ha-1), glufosinate ammonium (500 g ai.ha-1), paraquat (400 g ai.ha-1), saflufenacil (70 g ai.ha-1), and carfentrazone (24 g ai.ha-1) and an untreated control, as well as two seed evaluation periods, at harvest and six months after h arvest. Desiccants were applied at the R5 stage. The desiccants affected the yield, classification, color, and physiological quality of seeds of ‘BRS Guariba’. The glufosinate ammonium and paraquat herbicides compromised seed physiological quality. Flumioxazin did not affect seed yield components, color, and physiological quality. Storage at 20 °C for six months affected seed physiological quality.

Index terms:
Vigna unguiculata L.; vigor; storage

ABRATES - Associação Brasileira de Tecnologia de Sementes Avenida Maringá, nº 1219 , Jardim Vitória Londrina - Paraná Brasil, Tel./ Fax. 55 43 3025-5120 - Londrina - PR - Brazil
E-mail: contato@abrates.org.br