摘要
将辽宁、河南、山东等地采集到的70个寄生于桃小食心虫的球孢白僵菌菌株以3龄桃小食心虫进行筛选,得到了46-1,46-2和37-3三个致病率分别为96.7％、92.8％和93.3％的优良菌株。以四个代表高,中、低致病率的菌株46-1、46-2、7-1(43.3％)和66(33.3％),测定其菌丝的生长量,产孢量和几丁质酶活性的结果显示菌株的致病力与菌丝生长量、几丁质酶活性、菌株产孢量呈显著的正相关。
Laboratory screening and selection of Beauveria bassiana against peach fruit borer, Carposina nipponensis, were carried out in Beijing during 1988-89. Seventy strains were collected from Liaoning, Henan and Shandong Provinces and were inoculated on the 3rd instar larvae of C. nipponensis. Three strains selected (46-1, 46-2 and 37-3) had infectivities of 96.7%, 92.8% and 93.3%, respectively, which were higher than that of other strains. The growth character and chitinase activity of the collected B. bassiana strains were studied with four strains representing high, medium, and low toxicities to the host insect. The results indicated that the infectivity of B. bassiana strains tested had a significant positive correlation with the quantity of mycelia growth, chitinase activity and spore productivity.
关键词
白僵菌
致病力
菌株
生长
酶
活性
Beauveria bassiana Carposina nipponensis chitinase
