Evaluation of some vegetable oils against laboratory and field strains of stored grain insects | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 7, Issue 3, December 1999, Pages 69-76 PDF (2.43 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.1999.462119 | ||
| Author | ||
| A. A. M. Thabet* | ||
| Plant Protection Department, Faculty of Agriculture, Sana'a University, Republic of Yemen | ||
| Abstract | ||
| The present investigation aimed to evaluate vegetable oil of Neem, Sesame and Sunflower oils against laboratory and field strains of the adult stage of stored grain insects, Sitophilus oryzae and Rhyzopertha dominica. Aliquots of these oils were added to wheat grains in acetone to provide concentration of 10, 20, 40, 80, 160, 320, 640 and 1280 ppm and then infested with 20 adults of both laboratory and field strains of S. oryzae and R. dominica. Mortalities were recorded after 72 hours. Wheat grain samples with acetone only were used as a control. Percentage of mortality was corrected to the percentage of the control. The data showed that the laboratory strains were more susceptible than the field strains. Also, Neem oil was found to be the most effective than the other tested oils to the laboratory strains of R. dominica followed by Sesame oil, Corn oil and then Sunflower oil. Moreover, Field strains of S. oryzae and R. dominica were more tolerant to the tested oils than the laboratory strains. The present results show that Neem oil may prove to be very useful as a grain protectant. Such an approach would have the added advantage of minimizing the use of synthetic insecticides thereby reducing possible deleterious side effects associated with their use on stored food product. | ||
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