橘小实蝇对不同波长单色光及不同颜色LED灯的趋性反应

Phototaxis response of Bactrocera dorsalis(Hendle)to different wavelengths of monochromatic light and LED lights of different colors

橘小实蝇是一种世界性检疫害虫,严重威胁我国的果蔬生产。本研究利用昆虫趋光性,在室内使用光谱范围广、高分辨率单色仪以及自制昆虫趋光行为反应盒测定橘小实蝇雌、雄成虫在交配前后对8种不同波长单色光的行为反应,并利用智能调控波长LED灯测定橘小实蝇雌雄虫对不同颜色光的趋向率。结果表明,橘小实蝇雌成虫交配前趋光率较高的光为400 nm紫光和550 nm黄绿光,交配后为500 nm绿光、550 nm黄绿光;雄成虫交配前对400 nm紫光、500 nm绿光和550 nm黄绿光敏感,交配后对紫光区400 nm和黄光区575 nm敏感;趋向率对比试验中,与日光对比,雌成虫明显更加趋向506 nm绿光,雄成虫则对506 nm绿光和553 nm黄绿光的趋向率更高。综合分析橘小实蝇在单色光刺激下的趋避光行为反应和对不同颜色LED灯趋向反应,可见橘小实蝇对绿光和黄绿光更为敏感。

The oriental fruit fly,Bactrocera dorsalis(Hendle),is a quarantine pest in the world,which seriously threatens the production of fruits and vegetables in China.In this study,the behavioral responses of males and females of B.dorsalis to eight different wavelengths of monochromatic light before and after mating were detected by using a high-resolution monochromator device with a wide spectrum measurement range and a self-made phototactic response box,and the phototactic rates of male and female B.dorsalis to light of different colors were measured by intelligent wavelength controlled LED lights.The results indicated that the wavelengths eliciting a higher phototaxis response from female adults before mating were the purple light at 400 nm and the yellowish-green light at 550 nm.After mating,the sensitive light range for female adults was the green light at 500 nm and yellowish-green light at 550 nm.Before mating,the sensitive wavelengths for male adults were the purple light at 400 nm,green light at 500 nm and the yellowish-green light at 550 nm.The sensitive light wavelengths range for male adults after mating were the purple light at 400 nm and the yellow light at 575 nm.In comparison experiments,the female adults showed a stronger phototaxis to the green light(506 nm),and the phototactic rates of the male adults were significantly higher to green light(506 nm)and yellowish-green light(553 nm)than to sunlight.Based on comprehensive analysis of the phototaxis and photophobism responses of B.dorsalis to monochromatic light and its phototactic rate to LED light of different colors,the results indicated that B.dorsalis was most sensitive to green light and yellowish-green light.