芹菜夜蛾核型多角体病毒毒力的生物测定  

BIOASSAY OF SYNGRAPHA FALCIFERA MULTIPLE NUCLEAR POLYHEDROSIS VIRUS

作　　者：鲁晓知[1] 陈曲侯[1] 洪华珠 王家坤 余泽华 

机构地区：[1]华中师范大学昆虫学研究所

出　　处：《中国生物防治》1997年第4期151-153,共3页Chinese Journal of Biological Control

摘　　要：利用芹菜夜蛾核型多角体病毒室内感染２龄小菜蛾、棉铃虫和甜菜夜蛾，测得ＬＣ５０分别为２．４７×１０６、７．９６×１０５和２．２２×１０５ＰＩＢ／ｍｌ。以４．２２×１０７和４．２２×１０６ＰＩＢ／ｍｌ两种浓度感染小菜蛾、棉铃虫和甜菜夜蛾等２龄幼虫，测得ＬＴ５０，小菜蛾分别为６．１５和７．３２天，棉铃虫分别为８．２０和１１．３７天，甜菜夜蛾分别为５．５３和７．２０天。致死时间均随感染浓度增加而减少。An infectivity test of Syngrapha falcifera multiple nuclear polyhedrosis virus (SfaMNPV) against Plutella xyiostella (Px.), Helilcoverpa armigera (Ha.) and Laphygma exigua (Le.) was carried out in our laboratory. By bioassay on second instar Px., Ha. and Le. larvae, the LC 50 of SfaMNPV was determined as 2.47×10 6, 7.96×10 5 and 2.22×10 5PIB/ml respectively. When they were infected at a concentration of 4.22×10 7PIB/ml and 4.22×10 6PIB/ml, the LT 50 was 6.15d and 7.32d, 8.20d and 11.37d, and 5.53d and 7.20d, respectively.

关 键 词：芹菜夜蛾 核型多角体病毒 小菜蛾 生物测定 

分 类 号：S476.13[农业科学—农业昆虫与害虫防治]