Effect of repllency and Oviposition Deterrence of plant extract and powder of Acroptilon repence (Asteraceae) and Sophora aculeopoides (Fabaceae) on Saw toothed grain beetle (Oryzaelhylus surinamensis) in laboratory conditions

Saw toothed grain beetle (Oryzaephilus surinamensis) is one of the serious and destructive foods pests.it is a polyphagous insect, which feeds from variety of products. Nowadays, using plant-based combination instead of artificial insecticides usage, especially in storage pests, has received much attention. In the present research,  the effects of repllency and Oviposition deterrence of extract (concentration:240,320,400,480,560 (µl/l air ) )and powder (mix of 2 grams powder with 2 grams of wheat seeds) leaves and flowers of Acroptilon repence and Sophora aculeopoides was evaluated on final instar larvae and adult insects . The experiments were done in a dark room with the temperature range of 30±5°C and 70-75% relative humidity. The output results indicate that the extract and powder of the studied plants are effective on the repllency and oviposition deterrence of saw toothed grain beetle, and the effects of the extract and powder of A.repence on the desired parameters are greater than the S. aculeopoides of the expression. The results showed that the percentage of repllency and oviposition deterrence in the extracts of both plants were increased with concentration-increment. Intense insects reacted more in comparison with larvae against extracts and powders. The information obtained from this study could be helped the storekeeper for storing the warehouse products in a long-term and controlling the damages of saw toothed grain beetle.