Effect of Isaria fumosoroseus on mortality and fecundity of Bemisia tabaci and Plutella xylostella
Effect of Isaria fumosoroseus on mortality and fecundity of Bemisia tabaci and Plutella xylostella
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DOI：
10.1111/j.1744-7917.2009.01299.x
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发表时间：
2010-04-01
期刊：
影响因子：
4
通讯作者：
Wu, Jian-Hui
中科院分区：
文献类型：
--
作者：
Huang, Zhen;Ali, Shaukat;Wu, Jian-Hui
昆虫病原真菌最近已被用于管理粉虱（烟粉虱）和小菜蛾（小菜蛾）。在以前的研究中，玫烟色棒束孢已经显示出控制这些害虫的一些潜力。本文研究了I.在实验室条件下，观察了玫烟色葡萄球菌PF 01-N4菌株的死亡率、繁殖力等生命表参数的变化。作为第一步，B的第二龄的敏感性。在此基础上，研究了I.在繁殖上呈紫红色。都是B。烟粉虱和小菜蛾对I.在处理12天和11天后，玫烟色孢霉的半数致死浓度值分别为1.10 x 104和0.48 x 104分生孢子/mL。真菌感染显著降低了B的寿命和繁殖力。烟粉虱在1 x 107分生孢子/mL下，观察到9天的最小平均寿命，而对照为16.3天。小菜蛾的平均寿命为5.6天，而对照为17.68天。在繁殖的情况下，由B产生的子代的数量。随着孢子浓度的增加，烟粉虱和小菜蛾的平均分生孢子浓度分别为83.67和26.85、10.92和225.51、112.08和31.02粒/雌，孢子浓度分别为1 × 104和1 × 107个/mL。I.紫红色的内在自然增长率。
Entomopathogenic fungi have been used recently for the management of whitefly (Bemisia tabaci) and diamondback moth (Plutella xylostella). In previous studies, Isaria fumosoroseus has shown some potential to control these insect pests. In this paper, the effects of I. fumosoroseus (strain PF01-N4) on the mortality, fecundity and other life table parameters were observed under laboratory conditions. As a first step, the susceptibility of second instars of B. tabaci and P. xylostella was examined in dose-response experiments, which was followed by the studies on the effect of I. fumosoroseus on reproduction. Both B. tabaci and P. xylostella, were susceptible to I. fumosoroseus having median lethal concentration values of 1.10 x 104 and 0.48 x 104 conidia/mL after 12 and 11 days treatment, respectively. The fungal infection significantly reduced the longevity and fecundity of B. tabaci. At 1 x 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 x 104 and 1 x 107 conidial/mL, respectively. There was a significant effect of I. fumosoroseus on intrinsic rate of natural increase.