In this study, the phytotoxic effects of rosemary (Rosmarinus officinalis L.) extracts on the germination of wheat (Triticum aestivum L.) and insecticidal effects on the Rhyzopertha dominica (F.) and Sitophilus oryzae (L.) species were investigated. Different solvents (ethanol, methanol and acetone) were used to obtain extract from leaves of rosemary, and the highest extract yield was obtained from acetone solvent with 10.5%. The 250 mu g / ml (A(250)) and 500 (A(500)) mu g/ml concentrations of acetone extract sustained the highest seed germination of wheat as 96.7% and 95.6%, respectively, and there was no statistical difference between the controls (98.9%). In addition, control1 (92 +/- 0.6 mg) and A(250) extract (85 +/- 0.6 mg) resulted in the highest fresh weight of wheat statistically. All the extracts had a negative effect on the radicula and plumula length of wheat. Moreover, as efficacy of the extracts on stored grain pests was examined, after 72 hours exposure. The highest mortality was found as 68.33% in acetone extract for R. dominca, whereas this ratio was 58.33% in ethanol extract for S. oryzae. In conclusion, it was seen that rosemary extracts can be used in controlling the pests of stored grains.