Abstract: In order to explore the effects of temperature on the population growth of the Phenacoccus solenopsis Tinsley fed on pumpkin, the developmental duration and survivorship were investigated under the temperatures of 18, 20, 24, 26, 28 and 30℃, and the life table of the laboratory population of Ph. solenopsis was constructed. The results showed that the developmental rate of Ph. solenopsis increased with the temperature increasing from 18℃ to 30℃, and the relationship between the developmental rate and temperature could be fitted well with the Logistic model. Within the temperature range of 18-30℃, the generation time of females and males was 40.24-80.64 d and 25.21-54.31 d, respectively. The developmental threshold temperature and effective accumulated temperature of females were 7.39℃ and 889.89 day·degree, respectively, and those of the males were 8.58℃ and 523.47 day·degree, respectively. At 26℃, the survival rate and population trend index reached the highest, being 77.03% and 22.98, respectively, suggesting that 26℃ is suitable for the population growth. While the population trend indices at 18℃ and 30℃ were 2.99 and 9.80, respectively, suggesting that the population development ability of Ph. solenopsis is strong, but high and low temperatures are not suitable for the population growth of the Ph. solenopsis. This study on developmental duration and life table of the laboratory population of Ph. solenopsis provides scientific basis for its control.

Key words: Phenacoccus solenopsis, developmental threshold temperature, effective accumulated temperature, life table, population trend index