Testing the Effect of Some Botanical Oils on Some Aspects of the Life Performance of Lesser Grain Borer Rhyzopertha Dominica ( F.) (Coleoptera: Bostrichidae )

Abstract

The study was carried out in the laboratories of the Plant Protection Department / College of Agriculture `University of Basra during the period from 2019 to 2020. The results showed the fatal, attractive and repellent effect of botanical oils, Cinnamomum camphora (L.), Aloe vera, Zea mays, Mentha suaveolens, and Peganum harmala, a fatal effect on young adults.  Rhyzopertha dominica and the average mortality was 89.79, 96.53, 87.48, 87.58, 92.82%, respectively, while all oils had an attractive, not a repellent, effect.  The results showed that all oils with all their concentrations used caused a decrease in the number of members of the first generation resulting from the insect, which was reflected in the increase in the percentage of the amount of decrease in the members of the first generation. Aloe vera oil had the most impact, as the average number of individuals was 2.66, while the percentage of the decrease was 95.65% and the lowest  The effect of corn oil, the number of individuals reached 21.33, and the percentage of decrease was 65.20%, while the number of individuals in the control treatment was 61.3.  The highest germination percentage when treated with cactus oil was 88.87%, and the oils did not affect the vitality of the grains if the percentage germination did not differ significantly from the control.