利用缓病芽孢杆菌76—1菌株防治蛴螬的研究

A STUDY ON THE CONTROL OF WHITE GRUBS BY BACILLUS LENTIMORBUS(STRAIN 76—1)

1976年从山东荣成县崂山乡花生田罹病的蒙古丽金龟(Anomala mongolia Fald)蛴螬体内分离到一株缓病芽孢杆菌(Bacillus lentimorbus),编号为76—1菌株。此菌株对蒙古丽金龟、铜绿丽金龟等为害花生的虫种有较强的致病力(注射试验致病率分别为91％、81％;室内菌土与饲喂试验的致病率分别是28.9％、36.3％与35.6％、8.3％),田间小区试验累计达75％,大田防治效率平均为38.4％,且有长效性,施菌剂防区连续七年虫口持续下降。证明此菌株对防治花生田中丽金龟科一些蛴螬虫种有显著效果。

ln 1976, a line of strain Bacillus lentimorbus(strain 76—1) Was sifted from diseased white grubs(Anomala mongolica Fald.) in peanut field in Loushan countryside: Rongchen County of Shandong province. It showed high pathogenicity to peanutdiseased species Anomala mongolica Fald. and A. corpurenta Motsch. (From injection tests the pathogenetic rate was 91％ and 81％ respectively. In laboratory the bacterial-soil and the feeding tests showed that, the pathogenetic rate reached 28.9％ 26.3％ and 35.6％, 8.3％ respectively.) In field tests, the small area controlefficiency reached 75％, the larger area control efficiency the average was 38.4％, and strain 76-1 has a long-effect on that, as the bacterial agents applied to the peanut fields for serial seven years, the population of the white grubs had a continuous decrease. This Bacillus is an effective as pathogen that can be used to reduce the damage caused by the white grubs.