Effect of Isaria fumosoroseus on mortality and fecundity of Bemisia tabaci and Plutella xylostella

作     者：Zhen Huang Shaukat Ali Shun-Xiang Ren Jian-Hui Wu 

作者机构：Engineering Research Center of Biological Control Ministry of Education College of Natural Resource and Environment South ChinaAgricultural University Guangzhou China 

出 版 物：《Insect Science》 (昆虫科学（英文版）)

年 卷 期：2010年第17卷第2期

页      面：140-148页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 09[农学] 0904[农学-植物保护] 0901[农学-作物学] 090401[农学-植物病理学] 090402[农学-农业昆虫与害虫防治] 0713[理学-生态学] 

基　　金：国家973计划 华南农业大学校长基金 Public sector specific research projects 

主　　题：words Bemisia tabaci lsaria fumosoroseus longevity mortality Plutella xylostella reproduction 

摘      要：Entomopathogenic fungi have been used recently for the management ofwhite- fly （Bemisia tabaci） and diamondback moth （Plutella xylostella）. In previous studies, lsaria fumosoroseus has shown some potential to control these insect pests. In this paper, the ef- fects of I. fitmosoroseus （strain PF0 l-N4） on the mortality, fecundity and other life table parameters were observed under laboratory conditions. As a first step, the susceptibility of second instars ofB. tabaci and P. xylostella was examined in dose-response experiments, which was followed by the studies on the effect of/. fumosoroseus on reproduction. Both B. tabaci and P. xylostella, were susceptible to I. fumosoroseus having median lethal con- centration values ofl.10 x 104 and 0.48 ~ 104 conidia/mL after 12 and 11 days treatment, respectively. The fungal infection significantly reduced the longevity and fecundity of B. tabaci. At 1 ~ 107 conidia/mL, a minimum average longevity of 9 days was observed as compared to 16.3 days for the control. Similar results were also observed in P. xylostella with an average longevity of 5.6 days as compared to 17.68 days in the control. In case of reproduction, the number of progeny produced by B. tabaci and P. xylostella decreased with an increase in conidial concentration, with the average values of 83.67 and 26.85, 10.92 and 225.51,112.08 and 31.02 eggs/female for control, 1 × 10^4 and 1 × 10^7 conidial/mL, respectively. There was a significant effect of L. fumosoroseus on intrinsic rate of natural increase.