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Chinese Journal of Biological Control ›› 2025, Vol. 41 ›› Issue (3): 658-665.DOI: 10.16409/j.cnki.2095-039x.2024.07.017

• RESEARCH REPORTS • Previous Articles    

The Impact of Temperature on Trichogramma ostriniae with Ostrinia furnacalis as substitute host

YU Wangbin, DU Wenmei, ZHANG Junjie, RUAN Changchun   

  1. Jilin Provincial International Cooperation Key Laboratory for Biological Control of Agricultural Pests/Engineering Research Center of Natural Enemy Insects, Jilin Agricultural University, Changchun 130118, China
  • Received:2024-05-10 Published:2025-06-20

Abstract: Chionarctia nivea is a novel substitute host for producing Trichogramma. In this paper, the effect of temperature (19 ℃, 22 ℃, 25 ℃, 28 ℃, 31 ℃) on the breeding of Trichogramma ostriniae with C. nivea as host was investigated, with Corcyra cephalonica as a control of substitute host. The results indicated that temperature significantly affected biological parameters of Trichogramma. Notably, the developmental duration was 9.65 days, emergence was 93.71%, percentage of female wasp was 84.65%, fecundity was 165.9 eggs, deformed wasps rate was 5.80%, and longevity of female was 12.10 days at 25 ℃ . Under various temperature conditions, there was no significant difference in the developmental duration, emergence rate or percentage of female wasp between C. nivea and C. cephalonica. However, deformed wasps rate with host C. nivea was significantly higher than with host C. cephalonica. The fecundity of T. ostriniae with host C. nivea was significantly higher than that with host C. cephalonica at 25 ℃. At 31 ℃, T. ostriniae females with host C. cephalonica exhibited greater fecundity and lived longer than those with host C. nivea. In conclusion, C. nivea can serve as a new breeding host for T. ostriniae, with the optimal temperature of 25 ℃.

Key words: Chionarctia nivea, breed, Trichogramma ostriniae, temperature, biological control

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