1. Foliar fertilizer should be sprayed around 10 o'clock in the afternoon or after 4 o'clock in the afternoon on a sunny day, and spray evenly on the leaves and young stems. When spraying, pay attention to the dilution concentration, and prepare it according to the growth stage of the crop, control the fertilizer concentration and the frequency of spraying, and avoid fertilizer damage.

2. Herbicides are chemicals used in farmland, orchards, vegetable gardens, flowers, railway lines, roadsides, etc. to prevent and control weeds. Used in farmland, they can kill weeds in the field, but do not affect the normal growth of crops. .

3. After the herbicide is sprayed, the sprayer is used to spray other pesticides without cleaning. The residual herbicide liquid in the sprayer will often cause phytotoxicity to the crop. Therefore, the sprayer after spraying the herbicide must be cleaned. According to the type of herbicide, choose different cleaning methods. Most pesticides are acidic. We can use the principle of acid-base neutralization and put some alkaline things on it, which can also have a very good effect.