Laboratory bioassays were conducted to estimate the effectiveness of the entomopathogenic fungus Beauveria bassiana (Bals.-Criv.) Vuill. (Hypocreales: Cordycipitaceae) at 1.5 × 10⁸ and 1.5 × 10¹⁰ conidia/kg grain alone or mixed with the diatomaceous earths (DEs) Protect-It at 150 ppm and DEBBM at 50 ppm against adults of the rusty grain beetle, Cryptolestes ferrugineus Stephens (Coleoptera: Laemophloeidae), the lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae), the red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) and the psocid, Liposcelis paeta Pearman (Psocoptera: Liposcelididae). The adult insects were exposed to treated grains for 7, 14 and 21 days. For progeny emergence data, the treated units were remained under the same conditions for 62 days for all beetles and 30 days for psocids. The results revealed significant differences in mortalities of insect species among treatments and grains. The combined use of B. bassiana, at the highest dose, and DE increased adult mortalities of all species. In general, the treatments were least effective against T. castaneum and most effective against L. paeta. More numbers of dead insects were found on wheat than on rice or maize. The emergence of progeny was considerably reduced on grains treated with B. bassiana, at the highest dose, plus DE. The results of the present study suggest that the effectiveness of B. bassiana is fortified by the addition of DEs, but it varies among exposed insect species and commodities.

进行实验室生物测定以评估昆虫病原真菌白僵菌(Bals.-Criv.) Vuill 的有效性。（肉座菌目：Cordycipitaceae）在1.5×10 ⁸和1.5×10 ¹⁰个分生孢子/ kg的颗粒单独或与硅藻土（DES）保护-它在150 ppm或DEBBM在抵靠生锈谷盗成虫50ppm的混合，Cryptolestes象甲Stephens (鞘翅目: Laemophloeidae), 小螟, Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae), 红粉甲虫, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) 和 psocid, Liposcelis paetaPearman (Psooptera: Liposcelididae)。成虫暴露于处理过的谷物中 7、14 和 21 天。对于后代出现数据，处理过的单位在相同条件下对所有甲虫保持 62 天，对 psocids 保持 30 天。结果表明，处理和谷物之间昆虫物种的死亡率存在显着差异。B. bassiana最高剂量和 DE的联合使用增加了所有物种的成年死亡率。一般来说，这些处理对T. castaneum最不有效，而对L. paeta最有效。与水稻或玉米相比，小麦上发现的死虫数量更多。在用B. bassiana处理的谷物上，后代的出现显着减少，在最高剂量下，加上 DE。本研究的结果表明，加入 DEs 可以增强B. bassiana的有效性，但它因暴露的昆虫物种和商品而异。