مشخصات پژوهش

خانه /Host stage preference and ...
عنوان
Host stage preference and temperature‑dependent functional response of Diaeretiella rapae (Hymenoptera: Braconidae) on Schizaphis graminum (Hemiptera: Aphididae)
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
Biological control, Wheat aphid, Parasitoid, Behavioral response, Handling time, Searching efficiency
چکیده
The aim of this study was to investigate the host stage preference and functional response of Diaeretiella rapae (Hymenoptera: Braconidae) reared on Schizaphis graminum (Hemiptera: Aphididae). Firstly, host stage preference was determined under choice and no-choice tests. The parasitoid showed a preference for second instar nymphs of S. graminum in both choice and no-choice tests. Secondly, functional response was evaluated at five constant temperatures (10, 15, 20, 25, and 30 °C) and six host densities of second instar nymphs of S. graminum (2, 4, 8, 16, 32, and 64) during a 24 h period. The experiments were conducted at constant environmental conditions (25 ± 1ºC, 70 ± 5% RH and 16:8 h L:D photoperiod). Based on the logistic regression model, D. rapae exhibited a type II functional response at all five tested temperatures. The handling time was lowest at 30 °C (0.0263 h) and highest at 10 °C (2.5255 h). The searching efficiency of D. rapae varied at different temperatures. At 20 °C, the searching efficiency of the parasitoid was determined to be 0.0617 h−1, which was significantly higher than other temperatures. The current results indicate that D. rapae can be used as a biological control agent of S. graminum at temperatures ranging between 20 and 25 °C, but additional data need to be collected in field and semi-field conditions.
پژوهشگران علی اصغر طالبی (نفر اول)، مهدیه کاظمی (نفر دوم)، مهران رضایی (نفر سوم)، محمد علی میر حسینی (نفر چهارم)، سعید محرمی پور (نفر پنجم)