Regardless of the yellow plate or the blue plate: the height at which the trap is placed is important. When the plant is in the seedling, the height should be 10-15 cm higher than the seedling. When the height of the plant is close to the trap board, it should be increased by 10-15 cm as the plant height increases. If the height of tall pole crops is 0.8-1 meters, the trap board should be hung between the rows, the height is the same as the crop height. This facilitates close proximity to plants and traps pests more effectively. There is a method of catching insects. When the plants are taller and more lush, and there are more pests, you can use several trap boards to connect them in series. People stand between the rows of plants. It can be seen that small pests like whiteflies are rushing in one direction to the trap board like smoke. The trap board is covered with countless pests in just a few minutes, and you can change the trap board again , Repeat!