Abstract: The study aims to get the sensitive spectral range of Ectropis grisescens Warren to different light spectrum. The phototaxis or photophobism behavior of E. grisescens Warren in response to spectral sensitivity was tested under 18 monochromatic lights ranging from 370 nm to 600 nm in the laboratory. The results show that phototaxis or photophobism reaction were observed under all the tested monochromatic wavelengths between 370 nm and 600 nm spectrum. The female adults showed positive phototaxis under orange light (600-605 nm), green light (520-525 nm) and ultraviolet light (370-375 nm). Meanwhile the male adults showed phototaxis under green light (520-525 nm), ultraviolet light (395-400 nm) and ultraviolet light (390-395 nm). The female adults showed photophobia under ice indigo light (490-495 nm), blue light (440-450 nm) and red light (660-665 nm). Meanwhile the male adults showed photophobia under ultraviolet light (400-405 nm), blue light (440-450 nm), ice indigo light (490-495 nm) and CK. There are differences inphototaxis of E. grisescens Warren to light at different wavelengths, and gender is an important factor affecting the spectral behavior response. This study not only provided a necessary theoretical foundation for further research on light vision of E. grisescens Warren, but also provided a scientific basis for the use of phototaxis in the integrated management of E. grisescens Warren.

Key words: Ectropis grisescens Warren, adult, light spectrum, phototaxis, photophobism