Bactérias isoladas do filoplano no biocontrole da alternariose e da podridão negra da couve / Bacteria isolated from the phylloplane and biocontrol of alternaria diseases and black rot of collards

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

15/12/2010

RESUMO

An investigation was carried on observing the potential antagonism of 324 resident bacteria in the phylloplane of collards, grouped in: those producing fluorescent pigments; those forming endospores; and other antagonists. They were tested against alternaria leaf spot, caused by Alternaria brassicicola, and black rot, caused by Xanthomonas campestris pv. campestris. The selection was based on screening tests by means of in vitro and in vivo experiments in a greenhouse using mass selection and confirmation of the potential of biocontrol agents. Ten isolated one were selected for the control of each pathogen. In order to study the mechanism involved in biocontrol, 20 isolated ones were characterized using different mechanisms of antagonism to reduce black rot and alternaria leaf spot. The strain UFV-215 gave the control for Alternaria leaf spot and the isolate UFV-247 for black rot. Both strains were consistent in vitro tests and to reduce both diseases on cabbage. Both bacteria showed efficiency as biocontrol agents against the diseases in greenhouse experiments, showing great potential for utilization under field conditions.

ASSUNTO(S)

mancha de alternaria fitopatologia fitobactérias podridão negra phytobacteria black rot alternaria spot

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