Effects of different light wavelengths on the growth and reproduction of Mythimna separata
Author of the article:SANG Wen1, 2** DONG Wan-Jun1** HUANG Qiu-Ying1 ZHU Fen1 WANG Xiao-Ping1 GUO Shu-Hao2 LEI Chao-Li
Author's Workplace：1. Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; 2. Key Laboratory of Bio-Pesticide Innovation and Application, Guangdong Province, Department of Entomology, South China Agricultural University, Guangzhou 510640, China
Key Words：Mythimna separata (Walker), light, development, survival
Abstract：[Objectives] To investigate the effects of different light wavelengths on the growth, development and
reproduction of Mythimna separata, identify the key factors affecting the survival of this pest and provide information to
improve the accuracy of predictions of the distribution of M. separata and the adaptability of this pest to different light
environments. [Methods] LED lamps of specific wavelengths and light intensity were selected as the test light source, and M.
separata at different developmental stages as the test insects. The growth and developmental indices of M. separata at
different developmental stages were determined under 10 different light sources. [Results] The hatching rate of M. separata
eggs was significantly (50.33% < control) decreased by a 365 nm light source. A 420 nm light source significantly reduced
larval survival, pupation and pupal eclosion, rates by 72%, 65.67% and 72.87%, respectively, and larval and pupal stages at
this wavelength were respectively 12 days and 11.4 days longer than those of the control group. Wavelengths of 420 nm and
460 nm significantly reduced the survival rate of adult M. separata which were 44.44% and 40.00%, respectively, less than
those of the control group. [Conclusion] A light intensity of 1 000 lx and wavelengths of 365 nm, 420 nm and 460 nm inhibit
the growth, development and reproduction of M. separata.