Seasonal flight activity of Lobesia botrana (Den. & Schiff.) (Lepidoptera: Tortricidae) and determination of spraying time in Khalilabad region
عنوان دوره: دومین کنگره بین المللی حشره شناسی ایران
نویسندگان
چکیده
European Grapevine Moth (EGVM), Lobesia botrana (Denis & Schiffermuller) is the main pest of grape in Iran and most vineyards of the world, that annual loss to farmers is irreversible. Losses caused by larval feeding leads to disrupted plant activities, reduction in flower, buds and ultimately decreased quality and quantity of the crop. One of the biggest problems of grape farmers is the lack of awareness of the accurate time to fight the pest. In the years 2015-2016 researches were done to determine changes of L. botrana population and the best time to fight the pest. Five delta traps with sex-pheromone capsules installed in four different points (In point five traps) in the city of Khalilabad and finally counting of hunted moths was carried out once every two days. During this review, three completed generations annually and a partial fourth generation were demonstrated in the life cycle of the pest in the region. Most of the damage was observed on flowers in the first generation and on the ripe fruit in the third generation. Peak hatching of larva occurs about 10 days after peak flight of moths. Based on the obtained results in this research flight peaks were in the year 2015, April 9, May 26, July 13, August 26, and in the year 2016 were April 5, May 23, July 8, August 22, respectively included 1st, 2nd, 3 & 4th generations of pest. Get peak flight in each region will create a better performance control this pest and prevent irregular spraying.
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