نویسندگان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
An investigation was carried out to study the life history of Aphis nerri Boyer de Fonscolombe on oleander, Nerium oleander L., under laboratory conditions (RH of 70 ± 5% and a 16: 8 (L: D) h photoperiod) based on the age-stage, two-sex life table at 10, 15, 20, 25 and 30 ºC. Duration of total pre-adult stages was 35.61 ± 0.833, 19.6 ± 0.343, 12.02 ± 0.243, 9.12 ± 0.182 and 7.42 ± 0.115 days at 10, 15, 20, 25 and 30 ºC, respectively. As temperature increased, the developmental time and longevity of the A. nerri shortened. The shortest developmental time (17.72 ± 0.244 days) and longevity (10.3 ± 0.234 days) were obtained at 30 ºC. With decreasing temperature, age-stage survivorship (lx) extended. Maximum fecundity of females was observed at
25 ºC with 25.54 ± 0.76 nymphs per female. The intrinsic rates of increase (r) at these temperatures were 0.012 ± 0.0014, 0.075 ± 0.0016, 0.13 ± 0.001, 0.23 ± 0.003 and 0.24 ± 0.003 d-1, respectively. The highest net reproductive rate (R0) was at 25 ºC (25.56 ± 0.73) and the lowest value was at 10 ºC (2.58 ± 0.28). According to our results, 25-30 ºC were the optimum temperature range for A. nerri population growth.
کلیدواژهها [English]
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