Evaluation of crude extract substances from Streptomyces spp. for controlling Colletotrichum gloeosporioides caused anthracnose of chili
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Abstract
Anthracnose of chili caused by Colletotrichum gloeosporioides, is a major problem among important economic crops. In the present study, 34 isolates of Streptomyces spp. were used to determine the inhibition of C. gloeosporioides growth using dual culture test. The results showed 19 isolates of Streptomyces spp. had the percent inhibition of C. gloeosporioides growth and the highest percent inhibition of radial growth was Streptomyces isolate CH15. In addition, the percent inhibition of radial growth was Streptomyces isolate CH15 was not significantly different from 0.75 mg/ml benomyl. Then, the ethyl acetate extract of Streptomyces isolate CH15 at concentration 87.7 mg/ml in 5% (V/V) DMSO was tested for inhibiting C. gloeosporioides by the disc diffusion method. The results showed that the efficiency of the ethyl acetate extract of isolate CH15 for controlling C. gloeosporioides was not significantly different from 0.75 mg/mL benomyl.
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