Diversity and Mechanism of Inhibition of Trichoderma sp. Against Fusarium sp. Durian Plant Pathogen

Abstract

Durians  are plants that are widely cultivated in Indonesia because they have many benefits and delicious taste. It was reported that there was a decrease in durian fruit production due to leaf blight caused by the fungus Fusarium sp. Environmentally friendly control efforts use antagonistic agents such as the fungus Trichoderma sp. be one of the right solutions in controlling the disease. The purpose of this study were to explore the diversity of Trichoderma sp. in the rhizosphere of durian plants and evaluating the inhibition mechanism of Trichoderma sp. against Fusarium sp. The research was carried out in December 2021 - May 2022 at the PT. Pamorganda North Bengkulu  and Laboratory of Plant Protection, Faculty of Agriculture, University of Bengkulu. The results showed that the main disease in durian plants was leaf blight caused by the fungus Fusarium sp. From the rhizosphere of healthy durian plants, 16 isolates of Trichoderma sp. had been isolated, which belongs to the species T. atroviridae, T. aurioviridae, T. harzianum, T. koningii, and T. viridae.  Percentage of inhibition of Trichoderma sp against Fusarium sp. were ranging from 93.3 – 97.7%  with the mechanism of inhibition were competition for space, nutrients and oxygen; antibiosis, lysis and parasitism.