STUDY ON THE TEST AND EVALUATION OF THE TOXICITY OF THE STRAINS PREPARATION OF THE DIFFERENT SUBSPECIES OF BACILLUS THURINGIENS1S AND ON THE RESEARCH INTO ITS STANDARDIZATION
In this paper using the preparation of Bacillus thuringiensis of USA standard sample-subsp. kurstaki HD-l-S-1980 (H3a3b) the toxicity to different subspecies preparations such as subsp. dendrolimus U strain(H4a4b), subsp. galleriae C88 strain (H5a5b) is tested and evaluated. And product's standardization is also researched. Comparing their toxicity to various test-insects between the standard sample prepared from U strain and USA, stamdard sample, the boilogical determined results are as follws: the toxicit...