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Chinese Journal Of Biological Control ›› 2020, Vol. 36 ›› Issue (2): 294-299.DOI: 10.16409/j.cnki.2095-039x.2020.02.016

• SCIENTIFIC NOTES • Previous Articles     Next Articles

Effects of Fluctuating Temperature and Photoperiod on Sex Differentiation and Reproduction of Neoseiulus californicus (Parasitiformes:Phytoseiidae)

HU Haomin, LI Qing, JIANG Chunxian, WANG Haijian, YANG Qunfang   

  1. College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
  • Received:2019-08-20 Online:2020-04-08 Published:2020-04-16

Abstract: With Tetranychus cinnabarinus as the prey, sex differentiation and reproduction of Neoseiulus californicus were examined under combinations of 5 fluctuating temperatures (23/13, 26/16, 29/19, 32/22, and 35/25℃, temperatures in photophase/scotophase) and 3 photoperiods (14L:10D, 12L:12D, 10L:14D). A significant higher female rate (78.4%) was detected at the condition of 32/22℃ and 14L:10D. The second higher female rate (77.3%) was observed from the combination of 32/22℃ and 10L:14D. However, the highest fecundity (91.1 eggs/female) occurred in the combination of 32/22℃ and 10L:14D, which is significantly higher than that (43.55) in the combination of 32/ 22℃ and 14L:10D. In conclusion, the combination of 32/22℃ and 10L:14D is most beneficial to the reproduction of N. californicus. This finding serves to support the mass breeding of N. californicus.

Key words: Neoseiulus californicus, alternating temperature, photoperiod, sex differentiation

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