Green Synthesis of Silver Nitrate Nanoparticles from Camelina Sativa (L.) and Its Effect to Control Insect Pests of Stored Grains

Abstract

Oryzaephilus surinamensis (L.) and Sitophilus granarius (L.) are major pests of stored wheat, Triticum aestivum (Linn.) and cause huge economic loss to it. This study aimed to evaluate the toxic and repellent effects of Camelina sativa (L.) extract using green synthesis of silver nanoparticles against O. surinamensis and S. granarius. The bioassays were performed by applying three concentrations (5, 10 and 15%) of C. sativa extract and 200, 300 and 500 ppm in case of silver nanoparticles. Mortality was recorded at 24, 48 and 72 h while repellency was noted after 12, 24, and 36 h of the post-treatment. After 72 h of exposure, the highest concentration of C. sativa extract (15%) caused mortality of 43.1 and 35.2% to O. surinamensis and S. granarius, respectively. In repellency bioassays, the extract of C. sativa caused 37.7 and 30.2% repellency against O. surinamensis and S. granarius after exposure period of 36 h. While the highest mortality of 60.1% was observed against O. surinamensis at highest concentration (500 ppm) of the silver nanoparticles of C. sativa extract compared to S. granarius (46.2%) at same concentration after exposure period of 72 h. Highest repellency (42.7%) was observed against O. surinamensis at 500 ppm of the silver nanoparticles of C. sativa extract compared to S. granarius (36.2%) at same concentration after exposure to 36 h. The results revealed that green synthesized silver nanoparticles from C. sativa extract proved effective and can be used as eco-friendly management strategy of O. surinamensis and S. granarius.