1 male moth lure method 1.1 Induction time Zhejiang caterpillar moth, beet armyworm, and Spodoptera litura sex attractant male moths are generally suitable for the beginning of April each year, and the southern Zhejiang area can be appropriately advanced. 1.2 Allocating locations should be based on the local crop layout to select the lure area, generally it is appropriate to choose cruciferous vegetable contiguous planting. Beet armyworm and Spodoptera litura are omnivorous pests. Conditional units can conduct different types of crops and compare their occurrences in order to accurately guide production. 1.3 traps and placement traps are suitable for transparent traps with a diameter of 8cm. One of the extracting cores is fixed with a fine lead wire at the center of about 1cm above the mouth of the bottle. The bottle is filled with soapy water to the mouth of the bottle by 2cm. After the trap bottles are fixed on the wooden sticks, they are placed in the trapping area. In a trapping area, three identical traps should be placed, each trap being about 40m apart (a straight line or an equilateral triangle can be used). Different sex lures should be placed separately to avoid mutual interference. Under normal circumstances, the sex lure should be replaced once every 10 days, and should be replaced in 7 days in high temperature and arid climate. The amount of water in the trap should be kept and the soapy water should be changed frequently. 1.4 Data Recording and Forecasting Analysis The amount of moth in each trap was recorded on a daily basis, and the average single bottle of moth and the average single bottle of moth were counted; and meteorological data were recorded (minimum temperature, maximum temperature, average daily temperature, rainy day). , precipitation, etc.), crop types and growth period (changing conditions), sex lure replacement and prevention level. According to the peak of the average single bottle of moth, the peak of occurrence of adult adults in the field was estimated. According to the "Trial Measures for the Survey and Reporting of Major Diseases and Pests of Vegetables in Zhejiang Province", the duration of various insects at different temperatures in Plutella xylostella, Spodoptera exigua, and Spodoptera litura Combined with the comprehensive analysis of food conditions (crop layout and growth period), meteorological factors, and prevention levels, the peak period of each generation of larvae is predicted. According to the average number of moths in the average single bottle of moth (not necessarily only one day) and the total amount of the whole bottle in the whole generation, combined with the food conditions (crop layout and growth period), meteorological factors, prevention Comprehensive analysis such as level to predict the degree of occurrence of larvae of each generation. 1.5 Investigation of the occurrence of larvae in the field in the field In the occurrence period of Plutella xylostella, Spodoptera exigua, and Spodoptera litura, different crop types were selected every 5 days. The "Z" shape sampling was used to investigate the occurrence of field larvae to correct the attractant. Accuracy. 1.6 Situation report In the occurrence period of Plutella xylostella, Spodoptera exigua, and Spodoptera litura, the content of 1.4 and 1.5 will be reported every time, and the provincial station will be reported in time. 2 fascinating applications 2.1 Prevention and control principle The prevention and control of Datian adopts the “fascination methodâ€, that is, within a certain area, a large number of artificially set attracting attractants (traps) are allowed to diffuse in the air, even reaching the “supersaturated†state, making the male moth Under long-term sexual stimulation, fatigue and confusion after excessive excitement, so that it is impossible to accurately determine the orientation and distance of female moths, interfere with their normal mating activities, thereby reducing the number of matings and reducing the reproductive capacity of female moths (effective egg drop) ), reducing the amount of larvae produced by the offspring. 2.2 traps and placement traps with a diameter of 8cm transparent trap bottles is appropriate, take the lead 1-3 pieces with fine lead wire fixed at the center of the bottle about 1cm above the mouth, the bottle filled with soapy water to the bottle mouth 2 cm, after the trap bottles were fixed on the wooden sticks, they were placed in the trapping area. The trap placement density is generally 10-15/667m2, which can be adjusted according to the number of insect populations in the field. Under normal circumstances, the sex lure should be replaced once every 15 days. In high temperature and arid climate, the time should be shortened appropriately. The amount of water in the trap should be kept and the soapy water should be changed frequently. Passenger Elevator,Sightseeing Elevator,Panoramic Elevatoe,Prolift Elevator MAURER TECHNOLOGIES CO., LTD. , https://www.maurer-elevator.com