Acta Entomologica Sinica ›› 2021, Vol. 64 ›› Issue (9): 1120-1126.

• SHORT COMMUNICATIONS •

### Light and dark adaptation of adult compound eyes of Spodoptera frugiperda (Lepidoptera: Noctuidae) and their transformation rate to light-adapted state under yellow light

JIANG Yue-Li, WU Yu-Qing*, LI Tong, MIAO Jin, GONG Zhong-Jun, DUAN Yun, MEI Shi-Qiong, WANG Xue-Qin, LIU Qi-Hang

1.  (Henan Key Laboratory of Crop Pests Control, Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China, Ministry of Agriculture, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China)
• Online:2021-09-20 Published:2021-09-03

Abstract: 【Aim】 The phototaxis of moths is directly related to the transformation of light and dark-adapted states of compound eyes. This study aims to clarify the relationship between light and transformation of light- and dark-adapted states of compound eyes of Spodoptera frugiperda. 【Methods】 Quickly taking photos at different time, the light- or dark-adapted state of compound eyes, light and dark-adapted transformation rate of S. frugiperda under light- or dark-adapted state and exposed to yellow light of different light intensities were statistically investigated. 【Results】 The maintenance rate of light-adapted state of compound eyes of S. frugiperda adults gradually increased as the light intensity increased after exposure to yellow light for 1 h under light-adapted state, those of males under yellow light at 0.1-0.5 and 4-6 lx were 67.77% (32.23% into dark-adapted and middle states) and 100%, respectively, while those of females under yellow light at 7-10 lx reached 98.90%. When S. frugiperda adults were exposed to yellow light for 3 h under light-adapted state, the maintenance rate of light-adapted state of compound eyes also gradually increased as the light intensity increased, those of males and females under yellow light at 0.1-0.5 lx were 50.00% and 32.23%, and those of females and males under yellow light at 7-10 lx were 90.00% and 100%, respectively. When S. frugiperda adults were exposed to yellow light at different intensities for 30 min under dark-adapted state, the compound eyes gradually transformed into light-adapted state, the light-adapted transformation rates of compound eyes of both females and males under yellow light at 0.1-0.5 lx were 93.33%, and those of females under yellow light at 0.6-0.9 lx and males under yellow light at 1-2 lx were 100%. 【Conclusion】 These results suggest that S. frugiperda adults have strong photosensitivity, and females are slightly more photosensitive than males.