Effect of plant oil treatments against Sitophilus zeamais Motsch. (Coleoptera: Curculionidae) on stored maize
1 Department of Zoology, Adamawa State University Mubi, Nigeria.
2 Department of Biological Sciences, Taraba State University Jalingo, Nigeria.
3 Department of Botany, Ahmadu Bello University, Zaria, Nigeria.
4 Department of Biological Sciences, University of Mkar, Gboko, Nigeria.
* Corresponding author
Research Article
GSC Biological and Pharmaceutical Sciences, 2017, 01(02), 001–006.
Article DOI: 10.30574/gscbps.2017.1.2.0007
Publication history:
Received on 27 August 2017; revised on 19 September 2017; accepted on 06 November 2017
Abstract:
The effect of plant oil treatments extracted from Khaya ivorensis and Azadirachta indica was evaluated on adult maize weevils Sitophilus zeamais reared on maize grain. Four replicates of each treatment oils were constituted at 0% (control untreated), 1 ml, 2 ml, and 3 ml doses. Each of the pytochemical oil and the synthetic chemical (Daksh- Dichlorvos 100% EC w/v) was introduced into experimental jars (300 cm3) at graded levels, before 20 g of clean maize grain was incorporated. The treatment oils were separated from the grains with perforated white paper, before 10 newly emerged adult S. zeamais was added to the experimental jars including the control (untreated) experiment, which contain 20 g of maize grain but no treatment was added. The plant oils were evaluated for their toxic effect on S. zeamais, oviposition, F1 progeny emergence, grain damage and weight loss. Data collected were analyzed using ANOVA. The means were separated using LSD at P>0.05.The results revealed that treatment oils were toxic to the maize weevils when compared with the control (untreated) experiment. Among the plants, essential oil of K. ivorensis significantly (P>0.05) suppressed egg laying, F1 progeny emergence and grain damage. Therefore, the essential oil of K. ivorensis and A. indica is useful in the control of S. zeamais.
Keywords:
Azadirachta indica; Khaya ivorensis; Maize; Plant oil; Sitophilus zeamais
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Copyright © 2017 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0.
