Biological and chemical control of Sclerotinia sclerotiorum the pathogen of basal stalk rot of bean plants.
2011
Shaat, M.N. | El-Argawy, E.
Five isolates of Sclerotinia sclerotiorum were isolated and tested for their pathogenicity on, cv. Giza-3, bean plants (Phaseolus vulgaris L.), and all of them proved to pathogenic .Biological control in vitro was evaluated using two species of Trichoderma (T.harzianum and T.viridae) Chemical control in i vitro with three fungicides, rhizolex-T, topsin-M and homai80.Biological control with the two species of Trichoderma showed antagonistic potential against Sclerotinia sclerotiorum, however, T.viride proved the best potency. Rhizolex-T as a mean of chemical control was the most efficient. These fungicides and the biocontrol agents were compared in vivo in greenhouse. There were difference in efficacy between the application of fungicides and antagonists, mixing the antagonist with soil before the pathogen was the most affective treatment and even more than fungicide, reducing the percentage of disease incidence from 68.33 to 30.52 in case of T harazianum and to 18.27 for T viride.
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