Effects of varying temporal exposure to light on the feeding and walking behavior of adult Henosepilachna vigintioctopunctata (Fabricius)
Author of the article:FANG Mei** DAI Zhi-Ying SHUAI Yan-Ling LIANG Long-Yang ZHANG Chao-Qun XIE Jian-Kun TU Xiao-Yu
Author's Workplace：College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China
Key Words：the position of light period, Henosepilachna vigintioctopunctata, behavior rhythm, feeding, walking
Abstract：
[Objectives] To provide a scientific basis and technical guidance for the integrated pest management of Henosepilachna vigintioctopunctata (Fabricius). [Methods] Feeding and walking were observed and recorded together with light period (L06:00-18:00, L10:00-22:00, L14:00-02:00, L18:00-06:00, L22:00-10:00 and L02:00-14:00) under experimental conditions of (26 ± 0.5)℃ and RH 75% ± 2% once an hour for 5 days. [Results] (1) The feeding behavior of both sexes had a circadian rhythm. Feeding behavior of both sexes occurred from 10:00 to 12:00 in the morning. The proportion of time spent feeding was higher during the day than at night in all treatments. (2) The walking behavior of adults also had a circadian rhythm. Walking by both sexes occurred at any time of the day, but mainly during the light period. The percentage of time spent walking in the light period was higher than in the dark period for all treatments. [Conclusion] Light period affected the timing of feeding and walking in H. vigintioctopunctata adults. Light period had little influence on the circadian rhythm of feeding behavior but a considerable influence on that of walking behavior.