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Ectomyelois ceratoniae (Lep.:Pyralidae) population fluctuations and detection of prevalent parasitoids in Pomegranate orchards in Golestan province

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عنوان دوره: دومین کنگره بین المللی حشره شناسی ایران
نویسندگان
چکیده
Carob moth, Ectomyelois ceratoniae (Zeller) (Lepidoptera: Pyralidae) is the most important pest of Pomegranate that decreases quality and quantity of the fruits in Iran and limits fruit export. Accurate identification of the pest population in each region and its natural enemies, is essential for effective pest control. More than 800 hectares of pomegranates has been cultivated in Golestan province. In order to study the E. ceratoniae population trends, infested fruits containing larvae were collected frequently from orchards of Golestan province and transferred to the laboratory conditions. Monitoring of the pest populations were carried out in the orchards using pheromone traps. This study was conducted from April 2016 to May 2017. Infested fruits, were placed in transparent containers (10× 15× 20 cm) and covered with net, the larval parasitoids were collected and recorded the number of daily emerged moths or wasps. To capture the egg parasitoids, eggs of Sitotroga cerealella was used as factitious hosts. E. ceratoniae has four pick flight in Golestan province per year. The emergence and peak flight of the overwintering adult moths was observed in the 26 April and 10 May, respectively. The emergence of the first to third generation was recorded as 17 June, 1 Augest and 6 September but the maximum flight ocurred on 24 June, 6 Augest and 16 September, respectively. Trichogramma brassicae and Iconella myeloenta (Wilkinson) were determined as prevalent egg and larval parasitoids in each generation of E.ceratoniae in Pomegrantae orchards of Golestan province. I. myeloenta is recorded for the first time from Golestan province on the Carob moth in pomegranate orchards.
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