Three ways to reduce the cost of medication

? Give priority to prevention

??? The occurrence of plant diseases is from point to area, from few to many, from light to serious. We should give priority to the prevention of this kind of disease and grasp the critical period of disease control. The preventive effect of using the drug only once before or at the initial stage of the disease is very good. if the drug is used at least three times after the disease occurs in a large area, it will not only increase the cost of drug use, but also increase the labor cost. it also caused irreparable losses to crops.

Achieve symptomatic use of medicine

Many growers can not recognize the disease, so they can not select drugs correctly, resulting in poor control effect, or even ineffective. First, plant physiological diseases are mistaken for infectious diseases, and fungicides are used to treat physiological diseases. Physiological disease is a disease caused by the lack of certain elements, which can be cured only by supplementing the corresponding elements. if fungicides are used to prevent and cure the disease, the medicine is not correct, it is not only ineffective, labor-consuming, but also expensive.

Second, the use of fungicidal drugs to control bacterial and viral diseases, can not achieve the therapeutic effect, but that the quality of the drugs purchased is problematic.

Third, there are many kinds of fungal diseases in crops, if the disease judgment is not accurate, the choice of fungicides is inappropriate, also can not achieve the desired control effect. For example, Botrytis cinerea and rust are fungal diseases, but their medication is very different.

Fourth, there is a difference between protective fungicides and therapeutic fungicides. Protective fungicides are used before the occurrence of the disease to establish a protective film on the stem, leaf and fruit surface of the plant to prevent the invasion of bacteria. The effect of medication is good before the onset of the disease, but the prevention and treatment effect is poor after the disease. And therapeutic fungicides generally have the effect of internal absorption, it can be quickly absorbed and transmitted to the plant, killing germs to play a therapeutic role, after the onset of the disease should choose therapeutic agents.

The method of application should be correct.

The root diseases should be irrigated with chemical solution, the stem diseases should be sprayed or brushed, and the leaf diseases should be sprayed on both sides and evenly, focusing on the back of the leaves. For example, the root rot should be irrigated and the black stem of tobacco should be sprayed.