Regardless of the yellow board or the blue board: the height at which it is hung during trapping is very important. When the plant is seedling, the height of the plant should be 10-15 cm higher than the seedling. When the height of the plant grows close to the insect trap, it should be increased by 10-15 cm as the height of the plant increases. If the height of the high-stem crop is 0.8-1 meters, the trap board should be hung between the rows, the height is the same as the height of the crop. This is conducive to getting close to plants and trapping pests more effectively. There is also an immediate method of catching insects. When the plant is taller and more luxuriant, and there are more pests, you can use several trapping boards to connect them in series. People stand between the rows of plants, one hand the trapping board and the other hand to vibrate the plant with a small wooden stick, vibrating while walking, you You can see small pests like whiteflies rushing towards the trap board in one direction like smoke. The trap board was covered with countless pests in just a few minutes. You can replace it with a new trap board. , Repeat!