Zeina. Sadeq. Bddour(1)*, Ali. Mohamed. Ramadhan(2) and Eyad. Mohamed. Mohamed(1)
(1). Plant Protection Division, Directorate of Agriculture, Lattakia, Syria.
(2). Directorate of Plant Protection, Ministry of Agriculture ,Damascus, Syria.
(*Corresponding author: Zeina Baddour, : Zenabadr80@gMail. com).
Received: 30/03/2023 Accepted: 21/06/2023
Abstract:
The endoparasitoid Cotesia glomerata (Hymenoptera: Braconidae) is one of the most important parasites that attack Cabbage Large Butterfly Pieris brassicae (L.) The samples of both parasitoid and insects were collected from cabbage fields in AL-Bassa region in Lattakia Governorate. Biological characteristics of C. glomerata were studied on the larval stage of P. brassicae which reared on three different host plants: White cabbage, Cauliflower and Broccoli. These characteristics included: duration of life cycle, adult fitness: fertility, mortality, longevity, Sex ratio and percentage of parasitism, in addition to the relationship of dry weight of adults with fertility. Experiments were carried out under laboratory conditions (temperature 25±2°C, relative humidity 60±5%, light period (day: night) 16:8 h), in Insects Laboratory of the Department of biological Control in Lattakia Directorate Agriculture during the 2021-2022 season. The results showed that the host plant has a direct impact on the biological characteristics of C. glomerata. Fertility varied depending on the plant species, recording the highest percentage 78.33 % on the white cabbage comparing to 75.66 and 69.24 on Cauliflower and Broccoli. In addition to the difference in the duration of life cycle on the three hosts 23.96, 21.14 and 18.8 on White cabbage, Cauliflower and Broccoli respectively, the rates of parasitization were changed to 70.35% on the broccoli host compared to 90.25 % on white cabbage, and therefore according to the results of this study, white cabbage is the most suitable host plant for rearing the C. glomerata on larvae of P. brassicae under laboratory conditions.
Keywords: Cotesia glomerata. Pieris brassicae. Biological characters. Host plant.
Full paper in Arabic: pdf