Effect of Different Light-Emitting Diode (LED) Lights on the Behavior and Habits of Scopulasub punctaria Herrichet Schaeffer

Abstract

To investigate the phototaxis and photophobism behaviors and the gender differences of S. punctaria in response to different light spectra, 18 lights with wavelengths 370–600 nm were used, and effects of green spectrum (520–525 nm) and yellow spectrum (590–595 nm) on the oviposition, hatching rate, eclosion rate and longevity of S. punctaria (indoor fresh leaf-bred for 5 generations) were studied. The results showed that under the light of 370–665 nm, both female and male adults of S. punctaria had the phototropic and photoevasive behaviors (showed multi peaks), with females tended to orange and violet lights (395–400 nm); males tended to amber and violet light (370–375 nm). After 520–525 nm and 590–595 nm light irradiation at night, the number of oviposition decreased by 55.70% and 44% (significant difference); and the hatching rate decreased by 13.33% and 9%, respectively. Both the above two lights have effects on the pre-oviposition and average oviposition period, and have significant effect on the longevity of female adults, while no significant effect on male adults; and both the longevity of female and male adults was prolonged with the increased population density. This study is expected to provide a reference for the research and biocontrol of S. punctaria.