Improving control of crown rot disease and quality of pesticide-free banana fruit by combining Bacillus amyloliquefaciens DGA14 and hot water treatment
2013
Alvindia, Dionisio G.
The present study aimed at improving the control of crown rot disease and quality of pesticide-free banana banana fruit by integrated approach combining Bacillus amyloliquefaciens DGA14 and hot water treatment (HWT). The efficacy of treatment combination was tested on cultures of crown rot-causing pathogens, Lasiodiplodia theobromae, Thielaviopsis paradoxa, Colletotrichum musae and Fusarium verticillioides, and postharvest application. Combination of DGA14 and HWT inhibited mycelium growth by 82.61 % as compared to 66.68 % by DGA14 and 37.90 % by HWT, as single treatments. Spore germination was totally inhibited in DGA14 with or without HWT. Postharvest application with DGA14 + HWT gave 90 % control of fruit decay comparable to 93 % of synthetic fungicide. Fruit treated alone with hot water or in combination with DGA14 incurred the lowest loss in weight. The over-all quality of fruit with DGA14 + HWT was better appearance and firmer texture which was statistically comparable with fungicide-treated banana. DGA14 + HWT was more consistent in crown rot control i.e., limited variation in severity of disease within a treatment as compared to DGA14 and HWT, as stand-alone treatments.
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