1. The timing of medication must be grasped accurately, and only by understanding the occurrence law of diseases, insects and weeds and using drugs in a timely manner can it be effective.
2. Improper application methods The occurrence of diseases, insects and weeds in the field and the inhabitation of pests have a pest-inhabited part on the crop. The "arrow" of pesticides should hit the "target" of the harmful part.
3. With the rapid increase in the amount of pesticides and the continuous replacement of varieties, the resistance of Cordyceps is also intensifying, especially in major crops such as grain, oil, vegetables, tea, and fruits, and the resistance of Cordyceps is increasing several times or dozens of times.
4. The prevention and control object is not clear, and the disease is beaten by insects, insects are killed by disease, and grass is used to remove insects, which is a widespread phenomenon. For example, the red leaf blight that occurs after cotton buds are often mistaken for red spider mites for prevention.
5. Large waste of spraying liquid At present, the spraying equipment commonly used in rural areas in mainland China has coarse fog particles, poor control effect and unsafe. According to the measurement, this spray method has poor adhesion, low deposition rate, and serious pollution of the environment. Therefore, new machinery and technologies such as low-volume spraying and ultra-low-volume spraying should be actively promoted.
6. The limitations of pesticides themselves Some pesticides have good control effects on some diseases, insects and weeds, but they are powerless for other diseases, insects and weeds, and the control effect is extremely poor.
7. The application time is not well grasped For example, cabbage butterflies, cabbage worm adults, cotton leaf curl moths, rice locusts, etc. like to be active in the daytime with sufficient light, while lepidopteran armyworm and some moth pests are active, mating, and laying eggs at night. Therefore, the best prevention and treatment effect can be achieved by taking medication on time.
Don't ignore the seven reasons for the poor effect of pesticide application, I hope it will help you. If you want to buy high-quality and high-yield vegetable seeds, you can download the seed bank App, and the country's excellent vegetable varieties are available for everyone to choose.
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