Field use method: Use bamboo (wood) thin sticks to support and fix, and the field is distributed in a checkerboard pattern. 20 yellow boards are evenly inserted per acre. The height is slightly higher than the plant. Too high or too low will have a poor effect. Replace when the sticky insect area of the paper or board accounts for more than 60% of the surface area of the board, and replace when the glue on the board is not sticky. In order to ensure the adhesion of the homemade yellow board, it needs to be repainted once a week or so. The hanging direction should be the east-west direction of the board surface.
Note: The used paper or board should be recycled for centralized treatment, and the yellow board should be used in conjunction with other comprehensive prevention and control measures to effectively control the pest damage.
