In recent years, with the expansion of the cultivated area of ​​vegetables in protected areas, the conditions for wintering and reproduction of whitefly have been objectively established, and its distribution area has gradually expanded and the hazards have become increasingly serious. Due to the rapid growth rate of this insect, it can occur in more than 10 generations in one year, without diapause and dormancy. Over the years. The control of greenhouse whitefly mainly relies on chemical agents. However, the heavy use of pesticides not only causes a dramatic increase in the resistance of the greenhouse whitefly, but also causes serious pesticide residues. Phototaxis is the inherent basic behavior of many insects, and greenhouse whitefly has obvious tropism towards yellow spectrum. Yellow plate trapping is one of the effective measures for the comprehensive management of greenhouse whitefly. Not only is it simple to produce and easy to use, it can also solve the adverse consequences of chemical control. However, due to the lack of systematic theoretical guidance, there are many problems in the production and use of yellow plates, which affects the control effect of trapping and killing of yellow plates. In this study, a series of comparative experiments were conducted to systematically study the trapping effects of yellow and yellow trap lamps on greenhouse whitefly. In order to be able to promptly put the traplights into practical applications, improve the yield and quality of green vegetables. Related instruments: Solar insecticidal lamp GuangDong DuBa New Material Technology Co.,LTD , https://www.dubachem.com
1 Insect trap experimental materials and methods
1.1 Test Materials The test insect source is the whitefly natural insect source in the tomato greenhouse. The main materials and instruments include ZDS-10 automatic shift digital illuminometer, DWJI-l thermometer and hygrometer, microscope and SPss software.
1.2 Test methods
1.2.1 Yellow and yellow traplights were tested for insecticidal effects in different directions. Yellow and yellow traps were used in parallel with the plants and perpendicular to the direction of the plants. The yellow plate size was 20 cm x 30 crn. Processing, set up 6 repetitions for each treatment and randomly hang in the greenhouse. The number of traps was counted every 48 h and recorded three times in succession.
1.2.2 Yellow and yellow insect traps were tested at different heights for the purpose of attracting insects. The yellow and yellow traps were placed vertically, starting from a height of 20 cm at the top of the tomato, and each 20 cm was a grade l, that is, a lamp. The tomato heights were 20, 0, and 20 cm, respectively. A total of three treatments were set up. Each treatment was set up with six replicates and were randomly hung in a greenhouse. Count the number of traps every 48 h. Record 3 times in succession.
1.2.3 The effect of different powers on the effect of trapping insects with yellow trap lights was tested using lamp powers of 8, 20, 40, and 60 W. Each treatment was set up with 6 repetitions and randomly hung in the greenhouse. The number of traps was counted every 48 h and recorded three times in succession.
1.3 Statistical analysis.
After the survey results were sorted out, analysis of variance was performed using SPSS software.
2 Insect Lamp Experiment Results and Analysis
2.1 Insect attraction effects of yellow and yellow traps in different directions Yellow traps and yellow traps attract insects in different directions as shown in Table 1. The orientation of the plate surface and the lamp tube had no effect on the trapping effect of greenhouse whitefly, whether it was parallel to the plant row or vertical to the plant row. The results showed that the effects of trapping yellow traps and trap lights on greenhouse whitefly have nothing to do with the direction of suspension. It also shows that under this experimental condition, the trapping effect of yellow trap lights on whiteflies is good. 
2.2 Insect trapping effects of yellow and yellow insect traps suspended at different heights Yellow traps and yellow traps are suspended at different heights to attract insects. See Table 2. The height of 20 cm from the tip was the best, and it was significantly different from 0 cm and 20 cm. There was no significant difference between 0 cm and 20 em, but the trapping effect of yellow trap lamp on whiteflies was better than that of yellow plate. The difference was significant. 
2.3 Effects of different powers on the effect of trapping insects with yellow trap lights The effects of different powers of yellow trap lamps on trapping effects are shown in Table 3. The yellow trap lamp with the lamp power of 20 w is the best for trapping the whitefly, and the trapping effect of the trap lamp with the lamp power of 8, 40 and 60 w is significantly different. However, the trapping effect of traps with 8, 40, and 60 W had no significant difference. 
3 Insect trap experiment conclusions and discussion The yellow trap insects were found to be more effective than the yellow traps in a series of yellow and yellow insect traps for trapping greenhouse whitefly. Different trapping ways of yellow traps had no significant effect on the trapping of greenhouse whitefly. The height of the trapping lamp is best when the low end is higher than the top 20 cm of the crop. Maybe it's because greenhouses like agar. They like to work on the top of crops. Like to harm young plants. At the same time, the trapping lamp of 20 w had the best trapping effect on whiteflies in the greenhouse. According to this, it was proposed that the yellow trapping lamp could be used to trap and kill the greenhouse. Should use yellow vibrant colors. The height of the suspension should be slightly higher than the height of the plant. The hanging direction of the trapping lamp and the presence or absence of light during trapping can not be considered, which is consistent with the trapping effect of the yellow plate studied on the greenhouse whitefly.
The results of the experiment showed that the yellow trap lamp had a good effect in trapping and killing the whitefly. At the same time, it was found that the yellow trap lamp also has a certain trapping effect on L. sativae and aphids. In the application, one lamp can be used more. Reducing the use of pesticides. Reduce the cost of vegetable production. And increase the yield and quality of greenhouse vegetables.