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journal1 ›› 2019, Vol. 35 ›› Issue (3): 343-349.DOI: 10.16409/j.cnki.2095-039x.2019.03.001

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Optimal Temperatures for Artificial Rearing of Parasitoid, Sclerodermus pupariae (Hymenoptera: Bethylidae)

HU Shuai, WANG Xiaoyi, YANG Zhongqi, CHEN Ran   

  1. Key Laboratory of Forest Protection, State Forestry and Grassland Administration/Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
  • Received:2019-01-15 Online:2019-06-08 Published:2019-06-17

Abstract: Temperature effects on parasitism, development and reproduction of Sclerodermus pupariae on larvae of Thyestilla gebleri were examined in terms of parasitism rates, successful parasitism rates, pre-oviposition periods, developmental durations, progeny number, sex ratio of S. pupariae at five constant temperature regimes (21, 24, 27, 30, and 33℃) in the laboratory. The results showed that the parasitism rates and successful parasitism rates increased with the rise of temperatures, the highest parasitism rate of 100% reaching at 30℃ and the highest successful parasitism rate of 93.3% reaching at 27℃ and 30℃, and both reduced to 73.3% and 60% respectively at temperatures over 30℃. The clutch sizes significantly increased from 58.0 at 21℃ to 91.1 at 30℃ and decreased sharply to 52.5 at temperature over 30℃. The pre-oviposition periods were shortened while the developmental rates of larva, pupa and the entire immature stages of S. pupariae increased with the rise of temperature ranging between 21 and 33℃, but the highest developmental rate of egg reached at 27℃. These findings indicate that 27-30℃ is the optimum temperature range for artificial rearing of S. pupariae, which provide important supports for improving the efficiency of mass-rearing programs and optimizing biocontrol agent release strategies.

Key words: Sclerodermus pupariae, temperature, development, reproduction, artificial rearing

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