In this study, the efficacies of four entomopathogenic nematode (EPN) isolates of both Heterorhabditis bacteriophora (11KG and TOK20) and Steinernema feltiae (3KG and Tokat-Emir), obtained from Turkey and Kyrgyzstan, against an important storage pest of beans, the bean weevil (Acanthoscelides obtectus (Say) Coleoptera: Chrysomelidae), were determined. In single dose assays, the 2 isolates of S. feltiae caused the highest mortality (99.59%) of A. obtectus adults. At 3 different doses (25, 50 and 100 IJs insect -1 ) and temperatures (10, 15 and 20°C), the most effective isolates were H. bacteriophora TOK20 (73.09%), S. feltiae 3KG (100%) and S. feltiae 3KG (100%) at 100 IJs at 10°C, 15°C and 20°C, respectively. In the dose-mortality assays, the S. feltiae 3KG isolate was effective at 500 IJs insect -1 .