Abstract:
To explore the effects of temperature on the growth and fecundity of Atractomorpha sinensis population. By using soybean leaves as the food source, we observed the growth and development process of various developmental stages of population of A.sinensis from Guangzhou, Guangdong(GZ) under the conditions of different constant temperatures(16, 20, 24, 28 and 32 ℃), RH70% and a photoperiod of 16L∶8D, evaluated the variations in the developmental duration, developmental rates and survival rates. According to the logistic model and Lagrange mean value theorem, the suitable temperature range and optimum temperature for the growth and development of the population were calculated, and the ecological indexes such as the Intrinsic rate of increase of the population were analyzed by establishing the life table of the experimental population. The results showed that the developmental duration of each stage of A.sinensis population was shortened with the increase of temperature, and the developmental rates were accelerated. The survival rate of nymph stage was the highest at 24 ℃, which was 64.01%. The suitable temperature zones for the growth and development of A.sinensis was 16.14-35.02 ℃, and the optimal temperature was 25.58 ℃. Under the experimental temperature, the average fecundity of single female of A. sinensis population was the highest at 28 ℃, which was 62.00 eggs/female, the lowest value was 40.00 eggs/female at 20 ℃, and population could not complete their generation at 16 ℃. 24 ℃ was the closest to the optimal ambient temperature of its population generation, and its intrinsic growth rate(r
m), net reproduction rate(R
0) and population trend index(I) were the highest.