Evaluation of New Trials in Controlling Two Olive Lepidopteran Insect-Pests of Olive Trees, in Egypt

Field experiments evaluation were carried out in a private orchard cultivated with olive trees of (Manzanillo cultivar) at Wady El-Natroon region, throughout two subsequent seasons of 2016 and 2017 to control both of the lepidopteran olive moths; Prays oleae and the jasmine moth, Margaronia unionlis. Five treatments was applied; the release of the parasitoid-Trichogramma evanescens alone or followed with certain insecticides. The results showed that the subsequent monthly use treatment of release the parasitoid-T. evanescens then Nimbecidine® 0.03% E.C against P. oleae gave the best efficient treatment recording higher infestation reductions of 83.41 and 82.12% in both seasons of 2016 and 2017, respectively, followed by the more or less efficiency bimonthly release of the T. evanescens then Nimbecidine® 0.03% E.C, Nimbecidine® 0.03% E.C, Deltachem Super® 2.6% E.C, and release of T. evanescens only, that gave60.11 67.88%, 57.85 64.63%, 55.16 56.91% and52.48 53.66%, respectively. As for the M. unionlis the results indicated that the subsequent monthly use treatment of release the T. evanescens then Nimbecidine® 0.03% E.C gave the best efficient control recording higher infestation reductions of 86.89 80.39% in both seasons 2016-2017, respectively, followed by the performed treatment of Nimbecidine® 0.03% E.C, the bimonthly release of T. evanescens then Nimbecidine® 0.03% E.C, Deltachem Super® 2.6% E.C, and release of T. evanescens only, that gave infestation reductions amounted to 77.75 68.81%, 70.73 64.31%, 70.43 63.99 and 60.37 52.09%, respectively. Therefore, the monthly hang of the cards of parasitoid- T. evanescens followed by Nimbecidine® 0.03% E.C application at the following month could be recommended as effective of control both the insect-pests.