Effect of Temperature on Parasitism Rate and Life History Parameters of a Solitary Endoparasitoid, Microplitis pallidipes

doi:10.16409/j.cnki.2095-039x.2022.03.003

Abstract

Abstract: The influence of temperature on growth and development of Microplitis pallidipes was determined under laboratory conditions. Variations in parasitism rate and life history parameters of M. pallidipes were investigated at 6 constant temperatures by using the 2^nd instar Spodoptera frugiperda as host. Results indicated the parasitism rates at 23 ℃ and 32 ℃ were significantly greater than those at other temperatures, and the pupation rates at 20 ℃ and 26 ℃ were significantly greater than those at other temperatures. Developmental duration of egg-larva, pupa and adult decreased lineally with increasing temperature within 14 ℃―32 ℃. The relationship between temperature and developmental rate of M. pallidipes can be fitted by the Logistic model and linear model. Linear model was better than Logistic model in the egg-larva and pupa stage, while both models fitted well for the adult stage. Threshold temperatures for egg-larva, pupa, and adult were 10.2 ℃, 15.08 ℃ and 5.43 ℃, respectively, and the thermal constants were 110.27, 81.1 and 107.53 day-degrees, respectively. These data can be useful in determining the potential of using M. pallidipes as a biological agent, by optimizing mass rearing and release techniques of the parasitoid.

Key words: Microplitis pallidipes, Spodoptera frugiperda, parasitism rate, growth and development, effective accumulated temperature

CLC Number:

S476.3

JI Xiangyun, JIANG Jiexian, LI Wenwei, WANG Jinyan, ZHANG Hao, ZHANG Xu. Effect of Temperature on Parasitism Rate and Life History Parameters of a Solitary Endoparasitoid, Microplitis pallidipes[J]. Chinese Journal of Biological Control, 2022, 38(2): 300-305.

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