@article { author = {Sabbour, Magda}, title = {Bioactivity of some regular and Nano encapsulated essential oils against C. maculatus and C. chinensis}, journal = {DYSONA - Life Science}, volume = {1}, number = {3}, pages = {96-101}, year = {2020}, publisher = {E-NAMTILA}, issn = {2708-6291}, eissn = {2708-6291}, doi = {10.30493/dls.2020.239285}, abstract = {Callosobruchus maculatus (Cowpea weevil) and Callosobruchus chinensis (Bean weevil) are among the important pests of stored seeds. These insects are usually controlled by harmful insecticides. Essential oils are considered a safe substitute in controlling stored products pests. In this work, the Nano-encapsulation technique was used to enhance the effectiveness of three types of essential oils (Mentha piperita “Peppermint”, Coriandrum sativum “coriander”, and Laurus nobilis “sweet bay”). The effectiveness of both regular and Nano oils was evaluated for their insecticidal activities against the third-instar larvae of C. maculatus and C. chinensis at a concentration of 0.5%. Additionally, the ovipositional activity inhibitory effects of Nano granules were evaluated using by mixing Nano granules with cowpea at a rate of 0.5%. Furthermore, the persistent effect of Nano encapsulated oils was evaluated after 90 days in storage. The repellent effect of Nano granules was also evaluated using the arena choice test method. The highest mortality rates of both C. maculatus and C. chinensis after 7 days of 0.5% treatment were observed in M. piperita, followed by C. sativum and Laurus nobilis in both regular and Nano oils. A significant increase in the larvicidal effect in C. sativum Nano granules in comparison to its regular oil was noticed. The results indicated that both C. maculatus and C. chinensis life cycles were heavily affected by Nano granules treatments of the three tested Nano granules with M. piperita Nano granules having the highest impact. The lowest weight loss in stored cowpea was observed under M. piperita Nano granules treatment especially against C. maculatus (3%) compared to control treatment (50%). The highest repellent effect was observed under C. sativum treatment against C. chinensis (88%). These results are highly promising and show the potentials of these oils and their Nano derivatives in stored products integrated pest management.}, keywords = {Cowpea weevil,Bean weevil,Mentha piperita,Laurus nobilis,Coriandrum sativum,Nano}, url = {https://life.dysona.org/article_113052.html}, eprint = {https://life.dysona.org/article_113052_f1ac583f15b7da94eea231399ecb2995.pdf} }