为给蝗虫灾害光电诱导机械化捕集技术中诱导光源光照参数的选取及设计提供技术支持,该文利用LED光源和自制的行为反应试验装置采用对比试验法,进行了蝗虫趋光选择最佳的光谱优选,并测试了蝗虫趋光行为反应的光照阈值,探讨了不同光谱和光照度对蝗虫趋光行为影响的机理.结果显示:相同光照度条件下,蝗虫对紫光(405 nm)的内在趋光反应率最高,对紫绿蓝( 520+465+405 nm)组合光的反应次之；蝗虫对紫(405 nm)、绿(520 nm)、蓝(465 nm)及组合光的趋光反应率数学模型求解表明,蝗虫对不同光谱的趋光反应存在最高趋光光照度值和最低灵敏光照度值,其中紫光对二者的光照度最低；蝗虫的趋光响应受光谱和光照度的影响,在绿、紫、蓝光谱组合的光照度值内提高光照强度可达到蝗虫对紫光反应的逼近效果.%Photoelectric inducing and trapping locusts is a technology for utilizing locust's resource and avoiding environmental pollution of pesticide. To investigate the appropriate spectral illumination of locust's photoelectric inducement, different spectral illumination of light sources were tested comparatively on locust's photoelectric response using LED light source and phototactic behavioural trial equipment. On the basis of the comparative data of experiment, by establishing the mathematical model of locust's photoelectric response to different spectral illumination, the scope of different spectral illumination threshold on locust's phototactic response rate was analyzed, and the principle of different spectral illumination influence on the locust's phototactic effect was discussed. The results show that under the same illumination of light source, locust's inner phototactic response to purple light is the best, blue-green-purple light is the next. The result of mathematical solution show that locust's phototactic response to its sensitive spectra has the requirement of the highest phototactic illumination threshold and the lowest phototactic sensitive threshold, and locust's phototactic response to purple light is the lowest. Spectrum and light intensity influence the sensitive degree of locust's phototactic response, so enhancing light intensity of locust's sensitive spectrum can stimulate locust and intensify its phototactic response. In a certain range of illumination threshold, we can attain the approaching effect of locust's phototactic response to purple light through reinforcing the light intensity of blue-green-purple light.
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