湖北林业科技

Abstracts:In order to find a biological control method against Dendrolimus punctatus,the authors conducted a test of using 4×1010 spores which existed in one gram Beauveria bassiana（Bals.)Vuill and WP to control Dendrolimus punctatus.Four concentrations and four different treatment time were used. The results showed that Using 4×1010spores which existed in one gram Beauveria bassi （Bals.)Vuill and WP at the dose of 3 000 gram per hectare could control Dendrolimus punctatus efficiently; the efficacy reached 90.33% on the 7th day after treatment; the efficacy reached 96.00% on the 15th day after treatment; Usage of 4×1010spores which existed in one gram Beauveria bassiana（Bals.)Vuill and WP could kill the insects quickly and efficiently. Therefore, it could be used as an effective measure to control Dendrolimus punctatus.