Abstract: The culture characteristics, sporulation, half germination time, rapid dis-and re-hydration viability, ultraviolet radiation viability and bathing viability of 19 different source strains of Beauveria bassiana were observed or determined. With coding of culture characteristics, the correlation coefficient half-matrixes of strains were calculated according to the 8 acquired indexes. The results indicate that the near relation of different strains was mainly determined by the distance among original geographic distributions, and secondly by the hosts. The correlation of different strains from the same or close area had a significant difference, but that from different hosts did not have it.

Key words: Beauveria bassiana, Characterization, Host, Geographic distribution, shoot, exogenous growth regulator, rice, Sub1, survival percentage, submergence