Abstract
Diseases affect the process of plant growth. One of the pathogens that causes white root fungal disease, Rigidoporus sp., can be transmitted through root contact. This study aims to determine the types of biological agents and their effectiveness in inhibiting Rigidoporus sp. in vitro. Identification is carried out macroscopically and microscopically. Inhibition testing was conducted on Potato Dextrose Agar (PDA) media, followed by a variance test with a One-Factor Complete Random Design. The results showed that Trichoderma sp. with a rejuvenation age of 8 days (T8) was the most effective in inhibiting the growth of Rigidoporus sp. and had the highest percentage at 71%.
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