Abstract
Preventive effect of N-lauroyl-L-valine and its analogs against rice blast disease was related to their wetting power, and the amounts of intracellular substances leaked from the fungus. A deform of the mycelia of the fungus treated with N-lauroyl-L-valine was observed with a scanning electron microscope. The difference was found in the amounts of intracellular substances leaked from the fungus treated with N-lauroyl-L-valine, N-lauroyl-DL-valine and N-lauroyl-D-valine. From these results, it is concluded that the primary action of N-lauroyl-L-valine on the rice blast fungus may be the leakage of intracellular substances of the fungus by the surfactant action of the acylamino acid.
