Effects of juvenile hormone III on Haemaphysalis longicornis (Acari: Ixodidae)

Jingze Liu; Xiuying Zhao; Shuguang Liu; Zaijie Jiang

doi:10.11158/saa.4.1.1

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Jingze Liu,¹ Xiuying Zhao,² Shuguang Liu,¹ Zaijie Jiang³

¹Department of Biology, Hebei Normal University, Shijiazhuang 050016, China
²Library of Hebei Medical University, Shijiazhuang 050017, China
³Department of Biology, Beijing Normal University, Beijing 100875, China

Abstract

The effects of juvenile hormone III (JH III) on the premolting period and mortality of nymphal Haemaphysalis longicornis, and 2,6-dichlorophenol (2,6-DCP) synthesis in its female were determined. Nymphs were treated topically with 1, 5 and 10 μg/tick JH III on day 2 (2-PE), day 7 (7-PE), and day 10 (10-PE) post engorgement. The premolting periods of nymphs were prolonged by all doses in nymphs of the 2-PE group, but were normal in those of the 7-PE and 10-PE groups. With the increase of doses, the mortality rose in all groups. Inoculation of JH III on newly molted females enhanced the level of 2,6-DCP synthesis. Our results suggest that JH III is involved in the regulation of nymphal development and synthesis of 2,6-DCP in females of this tick species.

Citation Download Citation

Jingze Liu, Xiuying Zhao, Shuguang Liu, and Zaijie Jiang "Effects of juvenile hormone III on Haemaphysalis longicornis (Acari: Ixodidae)," Systematic and Applied Acarology 4(1), 3-7, (1 July 1999). https://doi.org/10.11158/saa.4.1.1

Accepted: 1 May 1999; Published: 1 July 1999

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