The development of resistance in stored-grain insect pests can be effectively reduced by using biological control methods. Entomopathogenic fungi have been under consideration as complementary and alternative agents to synthetic insecticides. The aim of this study is to identify the pathogenic potential of four different fungal isolates of Beauveria bassiana (Bals.-Criv.) Vuill. (Hypocreales: Cordycipitaceae) (WG-47, WG-48, WG-50, WG-51) and three isolates of Metarhizium anisopliae (Metchnikoff) Sorokin (Hypocreales: Clavicipitaceae) (WG-46, WG-49, WG-52) against the adult stages of the lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae), the granary weevil, Sitophilus granarius (L.) (Coleoptera: Curculionidae), the red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) and the khapra beetle, Trogoderma granarium Everts (Coleoptera: Dermestidae) at 1 × 10⁶, 1 × 10⁷, 1 × 10⁸ and 1 × 10⁹ conidia/kg wheat. Mortality was found dose dependent among all the tested species. Rhyzopertha dominica was the most susceptible followed by S. granarius, T. castaneum and T. granarium. Among the different isolates B. bassiana caused higher mortality compared to M. anisopliae. The isolates WG-50 and WG-51 of B. bassiana provided maximum mortality among the different tested species and led to lower F1 individuals compared to the controls. Our study indicates that entomopathogenic fungi have an elevated potential to successfully manage the aforementioned coleopteran species on stored wheat.

使用生物防治方法可以有效减少储粮害虫的抗性发展。昆虫病原真菌已被考虑作为合成杀虫剂的补充和替代剂。本研究的目的是确定白僵菌(Bals.-Criv.) Vuill的四种不同真菌分离株的致病潜力。(Hypocreales: Cordycipitaceae) (WG-47, WG-48, WG-50, WG-51) 和绿僵菌(Metchnikoff) Sorokin 的三个分离物(Hypocreales: Clavicipitaceae) (WG-46, WG-49, WG-52)对抗小螟的成虫阶段，Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae)，粮仓象鼻虫，Sitophilus granarius(L.) (Coleoptera: Curculionidae), 红粉甲虫, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) 和 khapra 甲虫, Trogoderma granarium Everts (Coleoptera: Dermestidae) at 1 × 10 ⁶ , ⁷ , 10 × 10 ⁸和 1 × 10 ⁹分生孢子/kg小麦。在所有测试物种中发现死亡率是剂量依赖性的。Rhyzopertha dominica是最易感的，其次是S. granarius、T. castaneum和T. granarium。与M. anisopliae相比，在不同的分离株中B. bassiana导致更高的死亡率. B. bassiana的分离株 WG-50 和 WG-51在不同的测试物种中提供了最大的死亡率，并且与对照相比导致 F1 个体较低。我们的研究表明，昆虫病原真菌在成功管理储存小麦上的上述鞘翅目物种方面具有更高的潜力。