Selection of antagonists for biocontrol of Xanthomonas euvesicatoria
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Ivana Pajcin, Vanja Vlajkov, Dragoljub Cvetkovic, Maja Ignjatov, Mila Grahovac, Damjan Vucurovic, Jovana Grahovac
Abstract
Xanthomonas euvesicatoria is a worldwide causer of pepper bacterial spot, a
bacterial plant disease responsible for massive losses of fresh pepper
fruits. Considering the current problems in management of bacterial plant
diseases, biological control using antagonistic microbial strains with high
potential for plant pathogens suppression emerges as a possible solution.
The aim of this study was to select suitable antagonists for suppression of
X. euvesicatoria among the bacteria, yeast and fungi from the genera
Pseudomonas, Lactobacillus, Saccharomyces and Trichoderma, based on in vitro
antimicrobial activity testing using the diffusion disc method. The results
of this study have revealed that cultivation broth samples of the
antagonists Lactobacillus MK3 and Trichoderma reseii QM 9414, as well as
supernatant samples of the antagonist Pseudomonas aeruginosa I128, have
showed significant potential to be applied in biological control of X.
euvesicatoria. Further research would be required to formulate suitable
cultivation medium and optimize bioprocess conditions for production of the
proposed pepper bacterial spot biocontrol agents.
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