Antagonistic potential of actinomycete strains against Colletotrichum sp. causes anthracnose disease in durian

The research was carried out at Can Tho University with the aim of investigating the ability of actinomycetes isolates to antagonise Colletotrichum sp. fungus causing anthracnose disease in durian. The results showed that among the 28 actinomycete strains evaluated, 6 actinomycetes including BT19, BL10, TG19, BT16, ĐT15, and VL9 had stronger antagonism with a radius of inhibition zone reaches 12.4, 9.4, 11.1, 9.8, 9.7, and 9.2 mm, respectively and antagonistic efficacy of 63.22, 58.62, 55.86, 53.56, 52.64, and 53.79%, respectively at 7 days after co-inoculation. The ability to degrade β-glucan of 6 strains BT19, BL10, TG19, BT16, DT15, and VL9 performed under laboratory conditions showed that the BT19 isolate had the highest β-glucanolytic activity with the β-glucan lyse halo radius of 8.53 mm and secreted β-glucanase content reached 0.678 IU/ml at 14 days after testing. The results of this study will be the basis for further research to contribute to finding effective methods to control anthracnose disease in durian.