Some farmers' friends use pesticides, which often have the problem of “headaches, pains and pains”. When tomato has a late blight, it is sprayed with pulcipit or metalaxyl. When an early blight occurs, it sprays senomomanganese or anti-drug, and when a bacterial disease occurs, it sprays copper. The result is that it cures a disease and the last one. Ill, the calamus scooped up again, and the cure was not cured. The reason is that the single drug is not conducive to the comprehensive control of multiple diseases.
The use of scientific and rational pesticides can expand the scope of use or treat several harmful organisms, and even increase the efficacy and reduce the side effects of pesticides such as drug resistance and phytotoxicity, which is efficient, labor-saving and time-saving. For example, Wang copper can be mixed with many fungicides and insecticides. Spraying 30% suspension agent 600 times solution and 70% thiophanate 800 times solution to control brown spot disease of vegetable bacterial leaf blight, anthracnose, bacterial angular spot disease, etc. The mixed "Garinong" is used to control tomato bacterial diseases and fungal diseases.