关键词: 烟蓟马, 趋光性, 趋向率, 敏感光谱, 单色光, 光强, 物理防治

Abstract: To clarify the spectral sensitivity and response to light intensity of Thrips tabaci Lindeman(Thysanoptera:Thripidae),15 monochromatic lights (ranging from 340 to 649 nm) and six different light intensities(1,10,50,100,150,200 lx) were adopted.The results showed that adult T.tabaci showed a positive phototaxis to the full spectrum natural light and 15 kinds of different monochromatic light,and no light avoidance reaction.The adult T.tabaci with two peak of sensitivity at 510,and 450 nm.Blue-green light (510 nm) and blue light (450 nm) were more attractive to T.tabaci adults,and the response rates were 80.0%,the displacements were 35.8 cm and 29.8 cm,respectively.The others order was green light(538 nm)>violet light (414 nm)>red light (601 nm) >blue light (492 nm)>UV light (380 nm)>UV light (340 nm)>red light (628 nm)>blue-green light (504 nm)>green light (549 nm)>yellow-green light (568 nm)>yellow light(577 nm)>yellow (589 nm)>red light (649 nm).The displacements in response of T.tabaci to blue-green light (510 nm) was significantly higher than that to all dark control,blue-green light (504 nm),green light (549 nm),yellow-green light (568 nm),yellow light (577,589 nm) and red light (628,649 nm). Overall,the sensitive spectrum of adults is mainly concentrated in the short wave region of ultraviolet lights (340—380 nm)—blue-violet lights (414—492 nm)—blue-green light (510 nm),which is not sensitive to the long wave region of green—yellow—red (549—649 nm).Furthermore,the light intensity has a significant effect on the phototaxis behavior of T.tabaci adults,showing that as the light intensity increase,the phototaxis as a whole increase in a wavy manner.The results indicated that thrip response to different wavelengths and light intensities are significantly different.We suggested that blue (450 nm) and blue-green(510 nm) colour trap boards can be used for monitoring and controlling T.tabaci.

Key words: Thrips tabaci Lindeman, Phototaxis, Response rate, Spectral sensitivity, Monochromatic light, Light intensity, Physical control