PRELIMINARY BIOASSAY OF BIOLOGICAL EFFECTS OF OILS FROM OREGANO AND CLOVES ON CALLOSOBRUCHUS MACULATUS
DOI:
https://doi.org/10.53555/eijas.v7i4.41Keywords:
Cowpea Weevil (CW), chickpea seeds (Cicer arietinum), Oregano oil, Cloves oil (EOs)Abstract
Callosobruchus maculatus (Coleoptera: Bruchidae), this beetle infests mainly Vigna unguiculata. There are several strategies to control of CW, by synthetic pesticides and physical means. The chemical applications are cheaper and easier to be applied but cause obvious consequences, which lead to a number of problems, The Essential oils (EOs) are widely applied in the traditional practices and in organic plant protection as insecticides repellents and antifeedant compounds. This study was carried out on 3 bioassay. The bioassay 1, carried out on artificial seeds, showed that the oily solutions could affect the oviposition. The average number of eggs laid by CW,was the highest on the oregano oil treatment at the dose of 2.0% followed by the control and the oregano oil treatment at the dose of 0.5%. The clove oil treatments induced the lowest egg laying. The bioassay 2, carried out on chickpea seeds in a completely randomized pattern, demonstrated that the average number of eggs laid on the chickpeas , was the highest on the control treatment followed by the oregano oil treatments at the doses of 0.5% and of 2.0%. The clove oil treatments induced the lowest egg- laying. The bioassay 3 treating directly the chickpea seeds. The average number of eggs laid on the chickpeas by the females within their life span was the highest on the oregano oil treatment at the dose of 2.0% followed by the oregano oil treatment at the dose of 0.5% and control. The clove oil treatments induced the lowest egg laying.
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