Homework must be done to improve the insecticidal effect.

In order to improve the insecticidal effect, we should not blindly choose insecticides, we must do a good job before killing insects, such as a corresponding understanding of many characteristics of insect pests, in the selection of appropriate agents, will be able to play a better insecticidal effect. According to the species and size of pests, chemical pests can be divided into aphid planthopper, borer moth, spider, beetle and so on. Insecticides with strong internal absorption such as trimethoprim and aphidipine should be used to control aphids, and diuretic should be used to control leaf-eating pests such as borer moths. When the pest is at a young age, the use of one agent has a very good effect, after 3 years old, two or more agents must be used together, such as with a certain concentration of penetrant will be better. According to the characteristics of pests, some pests lay eggs on the leaf surface, some lay eggs on the back of the leaves, some like to eat young leaves, some like to eat old leaves, some move in the upper part of the plant, some in the lower part of the plant, some like to feed during the day, and some like to eat in the evening. According to the above characteristics, the corresponding spraying methods should be adopted in prevention and control, and a better control effect will be achieved.