Pan Hongsheng, Liang Gemei, Lu Yanhui
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
Scientific Observing and Experimental Station of Crop Pests in Korla, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China.
Insects. 2021 May 10;12(5):427. doi: 10.3390/insects12050427.
Insects in the same taxonomic group generally have similar responses to light at various wavelengths in the laboratory. However, there is lack of direct evidence of between-group differences in insect responses to various light wavelengths under field conditions. During 2014 and 2015, we evaluated the relative attractiveness of LEDs with 19 single wavelengths to three pest orders and four natural predator orders in cotton fields. The average numbers of Lepidoptera, Hemiptera, Coleoptera, and total pests captured by traps with a 395-nm LED wavelength were higher than those for all others, except 440-nm wavelength captured the largest number of Hemiptera in 2015. For natural enemies, the average numbers of Coleoptera, Neuroptera, and total natural enemies were the largest in traps with a 572-nm LED wavelength, except 538-nm wavelength captured the largest number of Coleoptera in 2014. In general, the ratio of pests to natural enemies captured in the 395-nm wavelength LED trap was significantly more than all others. These results demonstrated that insects in different taxonomic groups have significantly different responses to light at various wavelengths under field conditions; these results will provide insights for in-depth studies on insect phototaxis and guide the long-term monitoring of insects in different groups.
在实验室中，同一分类群的昆虫通常对不同波长的光有相似的反应。然而，在田间条件下，缺乏昆虫对不同光波长反应的组间差异的直接证据。在2014年和2015年期间，我们评估了19种单一波长的发光二极管对棉田中的三个害虫目和四个自然捕食者目的相对吸引力。波长为395纳米的发光二极管诱捕器捕获的鳞翅目、半翅目、鞘翅目害虫以及害虫总数的平均数高于所有其他波长，不过在2015年，440纳米波长捕获的半翅目害虫数量最多。对于天敌而言，波长为572纳米的发光二极管诱捕器捕获的鞘翅目、脉翅目天敌以及天敌总数最多，不过在2014年，538纳米波长捕获的鞘翅目害虫数量最多。总体而言，在波长为395纳米的发光二极管诱捕器中捕获的害虫与天敌的比例显著高于所有其他波长。这些结果表明，在田间条件下，不同分类群的昆虫对不同波长的光有显著不同的反应；这些结果将为昆虫趋光性的深入研究提供见解，并指导对不同类群昆虫的长期监测。
