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Chinese Journal of Biological Control ›› 2022, Vol. 38 ›› Issue (6): 1418-1426.DOI: 10.16409/j.cnki.2095-039x.2022.01.009

• RESEARCH REPORTS • Previous Articles    

Diurnal Rhythm of Adult Behaviors of Anastatus orientalis under Different Photoperiod-Temperature Conditions

BAO Kexin, DANG Yingqiao, WANG Xiaoyi, CHEN Wenyu   

  1. Ecology and Nature Conservation Institute, Chinese Academy of Forestry/Key Laboratory of Forest Protection of National Forestry and Grassland Administration, Beijing 100091, China
  • Received:2021-10-08 Published:2022-12-16

Abstract: Anastatus orientalis is an egg parasitoid of Lycorma delicatula. The diurnal rhythms of the parasitoid adults under different photoperiod-temperature conditions are important for the improvement of the artificial rearing techniques of the parasitoid. In this study, the daily rhythms of feeding, host-seeking, resting, host-detecting, and oviposition were observed for 5 consecutive days at three laboratory rearing conditions, including low temperature and short photoperiod, standard conditions, and high temperature and long photoperiod. The results showed significant differences in the time allocation of the five activities of A. orientalis adults under different rearing conditions. The proportion of time spending in resting was the highest, whereas that of host-detecting was the lowest. With the increase of temperature and the extension of illumination time, the frequencies of feeding and host-seeking activities gradually increased, while those of resting, host-detecting and oviposition gradually reduced. The frequencies of feeding, host-seeking, host-detecting and oviposition of the parasitoid adults under photophase conditions were higher than those in the scotophase, in contrast, the frequency of resting in photophase was significantly lower in comparison to that in scotophase. Moreover, with the increase of day-age, host-seeking frequency decreased gradually, while that of resting behavior increased gradually. The frequencies of feeding, host-detecting and oviposition showed higher levels at the age of 2-3 days. These findings reveal that different rearing conditions have significant effects on the daily rhythm of A. orientalis adults, and there are certain differences in the daily rhythm of the adults of different ages.

Key words: Anastatus orientalis, adult, behavior, day-age, diurnal rhythm

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