Bioactivity of natural essential oils against Sitophilus oryzae and Ephestia Küehniella
Journal Title: Scientia Agriculturae - Year 2013, Vol 1, Issue 1
Abstract
The repellency test of three extracted oils Jatropha curcas, canola and Jojoba Seed oils, were studied against two lepidopterous insect pests Ephestia küehniellaand Sitophilusoryzae. Results showed that, the tested oils, are promising for controlling the target stored product pests. Results also, showed that Jatropha curcasoil acted not only as oviposition deterrents but also adversely influence fecundity. Moths oviposited eggs on treated seeds with Jatropha oil but the numbers of eggs is always lower in treated seeds than in the control. The tested oils were significantly decreased the seeds infestations. The means number of eggs deposited/female were significantly decreased to 48.4±1.7, 39.4±1.7and 29.3±3.7egg/female after E. küehniellatreated with Jojoba Seed oil at concentrations 5, 2 and 3%, respectively. Jatropha curcasoils were gave the higher mortality of S.oryzaewhen treated at the corresponding concentrations. Accumulative mortality (%) of E. küehniella and S.oryzae larvae increased gradually by increasing the period of exposure in case of treated foam with different tested oils. After seven days of treatments, the Jojoba Seed oil, Jatropha curcas and canola oil the accumulative mortality S. oryzae recorded 78.6, 79.6 and 55.4 , respectively as compared to 29.9 in the control.
Authors and Affiliations
M. M Sabbour
Keywords
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