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Accueil du site → Master → Palestine → Field Studies on Biology, Ecology and Management of Grape Berry Moth, Lobesia (polychlorosis) botrana Den & Schiff. [Lepidoptera : Tortricidae] on Some Grapevine Cultivars Vitis vinefera L. in AlArroub Agricultural Experimental Station, Palestine

Hebron University (2007)

Field Studies on Biology, Ecology and Management of Grape Berry Moth, Lobesia (polychlorosis) botrana Den & Schiff. [Lepidoptera : Tortricidae] on Some Grapevine Cultivars Vitis vinefera L. in AlArroub Agricultural Experimental Station, Palestine

Ihab Hafez Mujahed

Titre : Field Studies on Biology, Ecology and Management of Grape Berry Moth, Lobesia (polychlorosis) botrana Den & Schiff. [Lepidoptera : Tortricidae] on Some Grapevine Cultivars Vitis vinefera L. in AlArroub Agricultural Experimental Station, Palestine

Auteur : Ihab Hafez Mujahed

Université de soutenance : Hebron University

Grade : Master of Science in Plant Protection 2007

Résumé
Grapevine is one of the most important fruits planted in Palestine. The grape berry moth, Lobesia (polychlorosis) botrana Den & Schiff. [Lepidoptera : Tortricidae] is considered as a key pest of grapevine that is distributed in the Mediterranean countries. This study investigated the flight activity and the abundance of infestation on grapevine cultivars planted in Al-Aroub Agricultural Experimental Station in Hebron District, Palesine, during 2004 and 2005 growing seasons. In addition, experiments were done by using sex pheromone of L. botrana [(E,Z)-7,9-dodecadienyl acetate (E7,Z9-12:OAc)] as mating disruption in comparison to current insecticides used against the grape berry moth. Results show that seasonal flight activity of the berry moth started on beginning of April, and extended till end of November, with four peaks that were recorded during April, May, September and November. Halawani, Shami and Salti-khdari were the most preferred cultivars for start of infestation and, upon ripening of the grape, all cultivars were with economic level of infestation exceeded 5% of clusters. Results also show that, pheromone treatment was without significant effect on percentage of infestation ; Cypermethrin & Chloropyrifos treatments were with significantly lower percentage of infestation. However, traces of residue of Diazinon, Cypermethrin and Chlorpyriphose that were detected in grape leave as well as in fruits were higher than the tolerance levels even after the safety period that recommended for these insecticides. Therefore it is recommended not to collect grape leaves that are intended to be used for grape leaf roll meal from insecticide treated vineyards. In addition, it is recommended to conduct residue analysis for the grape fruits before harvesting to be sure that residues are below the tolerance levels for the used insecticides. Finally, it is recommended to use sex pheromone in order to effectively monitor the flight activity of the grape berry moth that helps in reducing the amount of insecticides applied, while maintaining acceptable insect control.

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