Abstract
The present experiment has been carried out to determine the effect of dried-mycelium powder of a Cephalosporium sp., an antibiotic-substance producing fungus, upon the development of leaf blast of rice plant. The roots of rice seedlings were immersed for 48 hours in the mycelial-powder suspensions of 0.1, 0.05, 0.025, and 0.0125 percent respectively. The seedlings, treated with suspensions of all concentrations except 0.025 percent, were promoted in growth and turned deeper green in color than the check plants. Thee leaf spots on the seedlings treated with 0.10.05 percent suspensions, decreased in number nearly to a half of those of the controls. The reduction in degree of infection was apparently in proportion to the dosis of the dried-mycelium powder.
