Abstract
Abstract: The objective of this work was to evaluate Trichoderma harzianum isolates for biological control of white mold in common bean (Phaseolus vulgaris). Five isolates were evaluated for biocontrol of white mold in 'Perola' common bean under field conditions, in the 2009 and 2010 crop seasons. A commercial isolate (1306) and a control treatment were included. Foliar applications at 2x109 conidia mL-1 were performed at 42 and 52 days after sowing (DAS), in 2009, and at 52 DAS in 2010. The CEN287, CEN316, and 1306 isolates decreased the number of Sclerotinia sclerotiorum apothecia per square meter in comparison to the control, in both crop seasons. CEN287, CEN316, and 1306 decreased white mold severity during the experimental period, when compared to the control.
Highlights
The objective of this work was to evaluate Trichoderma harzianum isolates for biological control of white mold in common bean (Phaseolus vulgaris)
Resumo – O objetivo deste trabalho foi avaliar isolados de Trichoderma harzianum para o controle biológico do mofo‐branco em feijão (Phaseolus vulgaris)
Biological control is advantageous over conventional pesticides, as it provides an alternative to reduce the soil inoculum potential, without harmful effects on the environment (Harman et al, 2004)
Summary
Biological control of white mold by Trichoderma harzianum in common bean under field conditions. Abstract – The objective of this work was to evaluate Trichoderma harzianum isolates for biological control of white mold in common bean (Phaseolus vulgaris). Five isolates were evaluated for biocontrol of white mold in 'Perola' common bean under field conditions, in the 2009 and 2010 crop seasons. The objective of this work was to evaluate Trichoderma harzianum isolates for biological control of white mold in common bean (Phaseolus vulgaris). Only the CEN287, CEN316, and 1306 isolates proved to be effective biocontrol agents of white mold under field conditions in the two crop seasons, reducing disease severity by 77, 74, and 76% in 2009, and by 96, 80, and 84% in 2010, respectively, in comparison to the untreated control. An increase in the general grain yield was verified between 2009 and 2010
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