Journal
BIOCONTROL SCIENCE AND TECHNOLOGY
Volume 24, Issue 10, Pages 1096-1109Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09583157.2014.923379
Keywords
Beauveria bassiana; biocontrol; cucurbits; fungal endophyte; poty-viruses; Zucchini yellow mosaic virus
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We investigated the potential of endophytic Beauveria bassiana to provide protection against Zucchini yellow mosaic virus (ZYMV), one of the most economically important viral diseases in cucurbits. Four selected B. bassiana strains were able to successfully colonise squash plants following foliar inoculation with the conidial suspension of each respective strain. However, no significant difference in percentage colonisation was observed among the tested B. bassiana strains. Disease incidence (percentage of plants showing ZYMV symptoms) and severity (rating based on a 5-point scale), sampled weekly for four weeks following the challenge inoculation of plants with ZYMV, were significantly lower in B. bassiana-inoculated plants as compared to control plants, regardless of the inoculated strain. This is, to our knowledge, the first report on the potential of endophytic B. bassiana to confer protection against plant viruses. Further studies should be conducted to determine whether such endophytic B. bassiana-mediated protection against ZYMV in squash extends to other cucurbits.
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