Study On The Trapping Effect Of Different Wavelength LED Light Source And Different Color Lure Board On Insects In Citrus Orchard

Citrus is an important economic crop in China.There are many kinds of insects in citrus orchard all year round.At present,in order to ensure the pollution-free production of citrus,physical measures such as insecticidal lamp and insect lure board are often used to control citrus pests.In this paper,we studied the effect of LED single band light sources with different wavelengths and different colors of luring boards on insect attractants.The main results are as follows:1.Trapping effect of LED single band light sources with different wavelengths on citrus pests.According to the selectivity difference of different insects to single wavelength light source,19 kinds of single wavelength light source insecticidal lamps were used in this experiment to study the trapping effect of different single wavelength light source insecticidal lamps on different insects in citrus orchard.The results showed that different LED single wavelength light sources have obvious selectivity to insects.These sources with the wavelength of 401 nm,403 nm and 407 nm were suitable for trapping Lepidoptera insects.These sources with the wavelength of 395 nm and405nm were suitable for trapping Coleoptera insects.Source of 385 nm had good attraction to Hemiptera insects,and source of 389 nm had certain attraction to Orthoptera insects.The attraction of single wavelength light source to different families of insects was further analyzed.The results showed that the 395 nm wavelength light source had obvious attraction to the gill beetles,and the average daily trapping amount was up to47.The 405 nm light source had a significant effect on the trapping of Rutelinae insects,the average trapping amount was 12 per day,which both were significantly higher than the control.The results also showed that the 411 nm wave length source had better trapping effect on the beetles.All these results provide a theoretical basis for the development of highly selective lamp for killing pests in the process of citrus planting.2.Trapping effect of different color boards on citrus pestsIn this experiment,according to the difference of different insect’s different colors,the trapping effect of different color luring boards on citrus pests and natural enemies except yellow and blue boards was studied,and the best color for controlling citrus pests except yellow and blue boards was developed.In this experiment,18 color luring boards including yellow and blue boards were produced by using CMYK technology 。 The results showed that the trap board could mainly trap and kill the thrips,Pieridae and Muscidae pests,and it was the best for the thrips under the color of c60y20,with the amount of 3222.3 head / board,and the trap effect was significantly better than the traditional yellow board 236.6 head / board and blue board 2659.5 head / board,and the best for the Pieridae pests under the color of c20y70,with the amount of 47.0 head / board,far higher than the traditional one 9.2head / plate of yellow plate and 3.0 head / plate of blue plate have significant difference;the best attraction to flies is under C30 color,with the killing amount reaching 4.5 head / plate,far higher than the traditional yellow plate and blue plate,with significant difference.The results laid a foundation for the selective control of citrus pests.