The red palm weevil, Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae), is a cosmopolitan pest of palms. Current management strategies largely depend on insecticides, and use of insect pathogenic fungi is needed in integrated pest management (IPM) programs. The effectiveness of Beauveria bassiana was determined against 3rd instar R. ferrugineus larvae by using the following concentrations, i.e., 3 × 108, 2 × 108, 1 × 108, 1 × 107, and 1 × 106 spores/ml. The lowest LC50 value (1.3×107 spores/ml) was recorded at the Khyber Pakhtunkhwa (KPK) population, followed by those populations from Punjab, Sindh, and Baluchistan, which had LC50 values of 1.5×107, 5.3 ×107, and 1.02 ×108 spores/ml, respectively, on the 7th day post-treatment; the highest mortality rates were 90.0, 85.0, 77.5, and 75.0% for the KPK, Punjab, Sindh, and Baluchistan populations, respectively, at the highest tested concentration of B. bassiana. The findings of this study indicate the potential use of B. bassiana in IPM programs for R. ferrugineus that are more ecologically sound than those programs that are heavily reliant on insecticides.

中文翻译：

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毒力白僵菌香脂木豆红棕象甲，红棕象甲（奥利弗）（鞘翅目：象甲科）

红色的棕榈象鼻虫Rhynchophorus ferrugineus（Olivier）（鞘翅目：Curculionidae）是一种世界性的棕榈害虫。当前的管理策略主要取决于杀虫剂，在病虫害综合治理（IPM）计划中需要使用病原性真菌。通过使用以下浓度，即3×108、2×108、1×108、1×107和1×106孢子/ ml，确定球孢白僵菌对三龄R. ferrugineus幼虫的有效性。开伯尔-普赫图赫瓦（KPK）人群的LC50值最低（1.3×107孢子/毫升），其次是旁遮普邦，信德省和Bal路支斯坦的LC50值分别为1.5×107、5.3×107和1.02处理后第7天，×108个孢子/ ml；KPK，旁遮普邦，信德省，和Baluchistan种群分别以最高的B. bassiana浓度进行测试。这项研究的结果表明，在IPM程序中，如果对R. ferrugineus的使用比在很大程度上依赖于杀虫剂的程序更具有生态学意义，那么就可以使用B. bassiana。