EFFICACY OF METARHIZIUMANISOPLIAE AND BEAUVERIA BASSIANA ON IMMATURE STAGES OF LEAF EATING CATERPILLAR, TRILOCHA VARIANS (LEPIDOPTERA: BOMBYCIDAE)

文献类型： 外文期刊

第一作者： Naeem-Ullah, Unsar

作者： Naeem-Ullah, Unsar;Qayyum, Mirza Abdul;Ramzan, Muhammad;Panhwar, Waheed Ali;Larik, Sajjad Ali;Soomro, Shah Rukh;Dawoud, Turki M.;Bourhia, Mohammed

作者机构：

关键词： Bombycid moth; Biological control; Ficus benjamina; Trilocha varians

期刊名称：ENTOMOLOGICAL NEWS （ 影响因子：0.3； 五年影响因子：0.4 ）

ISSN： 0013-872X

年卷期： 2025 年 132 卷 2 期

页码：

收录情况： SCI

摘要： This study investigated the effectiveness of two entomopathogenic fungi, Metarhizium anisopliae and Beauveria bassiana, against different life stages of Trilocha varians. The results demonstrated a higher mortality rate of eggs at increased conidial concentrations, with M. anisopliae and B. bassiana causing 37.42% and 33.39% egg mortality, respectively, at a concentration of 2 x 10(6) conidia/mL. Mortality of 2nd instar larvae increased over time, reaching 49.53%forM. anisopliae and 55.51% for B. bassiana after 120 hours of exposure. These findings highlight that while both fungi exhibit substantial lethality against T. varians, B. bassiana is slightly more effective, particularly in reducing the pest population over a shorter duration. The study also revealed that the effectiveness of the fungi decreased as the larvae develop, with 3(rd) instar larvae showing greater resistance. This reduced susceptibility is likely due to the biological and physiological changes that occur as larvae progress through their life stages, such as reduced feeding rates and enhanced metabolic defences. Overall, the study underscores the potential of M. anisopliae and B. bassiana as biopesticides, with B. bassiana showing a faster mode of action, making it a more potent option for controlling T. varians populations.

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