In order to achieve scientific use of pesticides, we must consider the following issues: First, the physiological characteristics, living habits, and resistance to pests of pests (fungi and bacteria), viruses, pests, etc. Second, the crops are immune to germs and viruses. Mechanism. Pay attention to the following points when doing specific operations:
First, prevent disease and low concentration, cure high concentration.
This is the first principle of the scientific use of pesticides. That is to say, even if the treatment is not too high, it is easy to produce drug resistance and waste of drugs, and it is also easy to produce phytotoxicity.
Second, exchange medication, mixed medication.
A pesticide is no better, and it should not be used more than 3 times on a crop. It is best to mix 2-3 pesticides with different mechanisms of action. Different mechanisms of action and modes of action not only increase the effectiveness of control, but also reduce the resistance of pests and diseases. Of course, one or several nutrient, disease-preventing, and immune-enhancing foliar fertilizers or plant growth regulators can also be added.
Third, uniform spraying, quantitative drug use.
The pressure of the sprayer should be sufficient, the atomization should be good, and the spray should be fog instead of rain. Spraying is to spray both sides of the blade and the stalk, so that it is fine and uniform, and it can not be sprayed or re-sprayed, so as not to cause poor control effect or pesticide damage; it is impossible to add two sprayers or three sprayers to a sprayer. This, invisibly increased the concentration; more can not be sprayed three sprayers in place, in order to save trouble, only sprayed two sprayers, or even a sprayer. Otherwise, the effect of treating diseases and worms is poor, and even more serious.
4. Appropriately increase the excellent spreading agent during spraying to improve the control effect.
The excellent spreading agent is an auxiliary agent that fully exerts the efficacy by increasing the moistening and unwinding ability of the sprayed liquid in the stems and leaves of plants and the surface of the pests and pathogens. Some may also be called surfactants, which reduce the surface tension of water and increase the wet spreading ability of aqueous solutions or aqueous suspensions on the surface of stems and leaves. Some pests have a waxy layer on the surface, and the water is difficult to wet and spread. With the addition of the spreading agent, the agent can invade the pest more quickly, and the control effect is greatly improved. Common spreading agents such as: silicone, infiltration and so on.
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