Effect Of Some Vegetable Oils On Life Stages Of The Two-Spotted Spider Mite Tetranychus Urticae Koch (Acari: Tetranchidaea) On Eggplant

Abstract

The study aimed to evaluate the effectiveness of some types of vegetable oils with different concentrations in affecting the phases of red mites with two spots. The results showed that the level of the effect differed according to the type of vegetable oil, as well as the effect of the concentration used was clear. With regard to the effect of oils on oyster eggs, the highest effect was in the treatment of olive oil, which recorded the lowest hatchability rate of 0.00%, followed by cannabis oil with hatchability of 1.67%, then clove oil, which recorded hatchability rates of 21.25% and 24.17 at concentration 2 and 5%, respectively. The best results were when treating olive oil compared with other oils, which led to the highest mortality rate of 96.05, 97.70 and 97.17% on all motile stages (larvae, nymphs and adults), respectively, while clove oil recorded the lowest mite mortality with values of 91.53 and 86. 16 and 84.44%, respectively. In general, it was found that the increase in the concentrations of vegetable oils corresponded to an increase in the mortality rate of the mobile phases, as the higher concentration (5%) led to the highest mortality rates for all the mobile phases with significant differences from the other concentrations.