Anti-plant viral activity of peptaibols, trichorzins HA II, HA V, and HA VI, isolated from Trichoderma harzianum HK-61

: Three peptaibols, trichorzins HA II (1), HA V (2), and HA VI (3), were isolated from okara fermented with Trichoderma harzianum HK-61 as anti-plant viral agents. Their structures were confirmed by spectroscopic and chemical methods. At micro molar concentrations, the trichorzins inhibited infections by Cucumber mosaic virus in the cowpea plant Vigna sesquipedalis.