INSECT INCIDENCE AND AGRONOMIC PERFORMANCE OF COMMON BEAN GENOTYPES IN THREE GROWING SEASONS UNDER ORGANIC SYSTEM

Abstract

The objective of this work was to observe the performance of creole genotypes of common bean and the limiting phytosanitary factors in three growing seasons in the organic system. Three trials were carried out, with plantations in October 2017, January 2018 and May 2018. A random experimental block design was used, consisting of 4 replicates and 10 treatments (commercial: BRS Esplendor (preto) and BRS Estilo (carioca), and the creoles: Amarelinho, Bolinha Vermelho, Cavalo Bolinha, Mouro, Paquinho, Palhacinho, Preto Jacaré and Roxão). The number of chrysomelidae damaged plants, whitefly nymph incidence, incidence of Bean golden mosaic virus (BGMV), thrips and heteropteran incidence were quantified. Besides, the grain mass and quality of grains (yield, normal grains, spotted grains and chocho grains) were measured. The first season of growing had the highest heteropteran incidence; BGMV was observed only on second season. Third season of sowing produced highest yield and lower insect incidence. Insect incidence varied between the genotypes at all data of sowing, with minor differences between the creoles and commercial materials. BGMV in second season prevented bean production in all genotypes.