Fumigant toxicity of Artemisia haussknechtii essential oil and its nano-encapsulated form
Masumeh Khanahmadi, Parvaneh Pakravan, Abbas Hemati Azandaryani, Maryam Negahban and Elmira Ghamari
In this study, the insecticidal activity Artemisia Haussknechtii essential oil, extract and encapsulated form of essential oils in nanoparticles were investigated. Interfacial compression polymerization method was investigated for nano capsules preparation. The effects of emulsifier composition, co-emulsifier, and temperature on the properties of the nanocapsules were investigated. The scanning electron microscopy of particles proved the preparation of nanoparticles. Fumigant toxicity of oil and extract demonstrated fumigant toxicity against Tribolium castaneum and Sitophilus oryza.
It was demonstrated a mortality of 100 percent of Sitophilus oryzae in the concentration of 166ppm. The insecticidal activity varied based on insect species. With the alteration of concentrations of the oil and extracts and exposure time, the variety on fumigant toxicity had shown due to the volatility of extract. The results demonstrated that A. haussknechtii essential oil and its nano-encapsulated form could play a significant role in the formulation of essential oil-based insecticides for the management of stored-grain insects.