https://www.socictopen.socict.org/items/show/27288
title: CONTROL OF ANGULAR LEAF SPOT BY USING PROTECTIVE MIXTURES IN IRRIGATED COMMON BEAN UNDER ORGANIC CROPPING SYSTEM CONTROLE DE MANCHA-ANGULAR UTILIZANDO-SE CALDAS FERTIPROTETORAS EM CULTIVO ORGÂNICO DE FEIJOEIRO IRRIGADO
subject: Agricultura orgânica, Calda bordalesa, Phaeoisariopsis griseola, Phaseolus vulgaris, calda sulfocálcica
description: A field experiment was carried out with the Pérola and BRS Valente cultivars, aiming to evaluate the efficiency of protective mixtures, in two spraying periods, for controlling angular leaf spot caused by Phaeoisariopsis griseola in common bean, under organic cropping system, in the dry season and under irrigation. A randomized complete block design, in a 2x4 factorial scheme, with four replications, was used, in which the first factor was the spraying intervals (15 and 30 days), and the second the protective mixtures (bordeaux, lime sulfur, and a mixture with silicate Rocksil®) and control without any mixture. To the Pérola cultivar, the bordeaux mixture provided an increase of 17,7% in grain yield, when compared to the non-sprayed control, reducing significantly the angular leaf spot severity, achieving a control efficiency of 75%, and propitiating a profit of R$ 386.40 ha-1, when applied at each 15 days. To the BRS Valente cultivar, the bordeaux mixture and lime sulfur provided an increase of 25% and 21,8% in grain yield, in comparison to the non-sprayed control, achieving a control efficiency of 62% and a profit of R$ 573.15 ha-1 and R$ 464.10 ha-1, respectively, when applied at each 15 days. KEY-WORDS: Phaeoisariopsis griseola; Phaseolus vulgaris; organic agriculture; bordeaux mixture; lime sulfur. O objetivo deste trabalho foi avaliar a eficácia de caldas fertiprotetoras, em dois intervalos de aplicação, no controle de mancha-angular causada por Phaeoisariopsis griseola, em sistema orgânico de produção, no período de inverno e sob irrigação por aspersão. O experimento foi desenvolvido a campo, com as cultivares de feijoeiro comum (Phaseolus vulgaris L.) Pérola e BRS Valente. Utilizou-se delineamento experimental de blocos ao acaso, em esquema fatorial 2x4, com quatro repetições, em que o primeiro fator correspondeu aos intervalos de aplicação (15 e 30 dias) e o segundo a caldas fertiprotetoras (bordalesa, sulfocálcica e calda elaborada com silicato Rocksil®) e…
creator: Wellington Pereira de Carvalho, Alberto Luiz Wanderley, Charles Martins de Oliveira
source: Pesquisa Agropecuária Tropical
publisher: Universidade Federal de Goiás
date: 2010
relation: http://www.revistas.ufg.br/index.php/pat/article/view/6264
coverage: Agriculture (General)