Effects of exposure to different LED lights during the scotophase on the growth, development and reproduction of Spodoptera litura (Lepidoptera: Noctuidae)
Author of the article:ZHONG Chun-Lan, ZHU Di-Fu, CHENG Yu-Meng, GONG Hui-Rong, CAO Ling-Zhen, HUANG Shao-Di, RAO Jia-Ling,
Author's Workplace：College of Life Sciences, Jiangxi Normal University
Key Words：Spodoptera litura; LED light in turns; growth and development; reproduction
Abstract：
[Objectives] To understand the effects of exposure to different LED lights on the growth, development and reproduction of Spodoptera litura. [Methods] Larvae, pupae and adults of S. litura were randomly assigned to different LED light treatment groups: L1, L2, P1, P2, A1 and A2, whereas those assigned to the control group were kept under a photoperiod of 14L⁚10D. [Results] Exposure to LED light had no significant effect on the pupation rate compared to the control group (P>0.05). The adult eclosion rate of the P1 group (66.2%) was significantly lower than that of the L1 and L2 groups (P<0.05). The L1 group had a significantly shorter larval (♀: 15.8 d, ♂: 16.4 d) and female pupal, periods (9.8 d, P<0.05) than the control group. The P1 and P2 groups had a significantly longer male pupal period (11.9 and 11.8 d, respectively, P<0.05). With the exception of female pupae in L2 group, all treatment groups had significantly lower pupal weights (P<0.05) than the control group. Adult male longevity in the P2 group (7.5 d) was significantly less than that of the control group (12.2 d, P<0.05), and the pre-oviposition period of the A2 group (3.4 d) was significantly longer than in the L2 and A1 groups (P<0.05). Females in the L1, P1 and P2 groups laid fewer eggs per female than those in the control group (P<0.05). [Conclusion] Exposure to different LED lights during the scotophase has significant effects on the growth, development and reproduction of S. litura. These effects vary with developmental stage and the type of LED light.