Study on efficiency of Iranian formulation of diatomaceous earth on bruchid beetle,Callosobruchus maculatus F (Col.: Bruchidae)

Laboratory studies were performed to evaluate the insecticidal effects of Iranian formulation ofdiatomaceous earth DE (Sayan®) on adults of bruchid beetle, Callosobracus maculatus F (Coleoptera:Bruchidae), at 30±1 ˚C and 60±5 % RH in dark. Experiments for bioassay & adult emergence evaluation,were carried out with 6 concentrations (0, 30, 72, 173, 416 and 1000 ppm) with 6 replications. The resultsshowed that the concentration 416 ppm of DE had acceptable effects on C. maculatus mortality after 3days. After 3 days, the LC50 of DE for C. maculatus adults was estimated to be 58.85 ppm. DE werekilled the newly emerged beetles and the concentration 1000 ppm of DE had acceptable effects on F1emergence reduction (81%). As time goes by, DE stability and efficiency were constant. As a result,Iranian formulation of diatomaceous earth (Sayan®) can be used to protect grains against C. maculatusadults.

کلیدواژه ها:

bruchid beetle ، callosobracus maculatus ، diatomaceous earth ، Iran ، pest control