Bacillus thuringiensis UV耐性株の数種鱗翅目昆虫に対する殺虫活性および持続性

概要

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A highly UV-resistant strain, designated UVR-M, of Bacillus thuringiensis serovar kurstaki was produced by selection using repeated exposure to UV irradiation. The difference in the UV resistance levels between the UVR-M strain and the HD-1 (serovar kurstaki) strain was more than 100 times. This resistance was observed in both spores and vegetative cells. When compared to the HD-1 strain, the UVR-M strain was 1.5 times more prolific in production of spore/crystal complexes, and 1.75 times more active against silkworm (Bombyx mori) larvae. Larvicidal activity tests with six selected lepidopterous pests showed no significant difference between the two strains in activity against Plutella xylostella, Spodoptera litura, Spodoptera exigua, and Homona magnanima. However, the UVR-M strain was five times and 20 times more active against Spodoptera depravata and Adoxophyes sp., respectively, compared to the HD-1 strain. The field persistence of the activity and the spore viability of the UVR-M strain was far greater than that of the HD-1 strain.
日本応用動物昆虫学会の論文
1998-02-25