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[Chemical Knowledge]：Decrypt the principle of pesticides: how to effectively kill pests

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Pest is one of the problems that we often encounter in our lives, which not only harms our production and life, but also has a certain impact on the ecological environment. In order to effectively control pests, pesticides have become one of our common weapons. So, how do pesticides work? Let's take a closer look at the principles of pesticides. Classification and

of

1. insecticides According to the chemical composition of insecticides, we generally divide them into four categories: organophosphorus, carbamate, pyrethroid and fungicide. Different pesticides have different effects on different pests, so it is necessary to choose the appropriate pesticide according to the specific situation. The mechanism of action of

2. insecticides
the mechanism of action of
insecticides is mainly by affecting the nervous or metabolic system of pests to achieve insecticidal effect. Taking organophosphorus pesticides as an example, its mechanism of action is to inhibit the activity of cholinesterase, leading to the excessive accumulation of neurotransmitter acetylcholine and causing the inhibition of the central nervous system, so as to achieve the insecticidal effect.

different insecticides have different mechanisms of action on pests. The mechanism of action of carbamate insecticides is to inhibit the activity of neurotransmitter-glutamate esterase, which leads to excessive accumulation of neurotransmitter-glutamate, causing paralysis and death of pests.

pyrethroid insecticides exert insecticidal effects by acting on neurotransmitter receptors in the nervous system of pests, resulting in over-excitation of nerve receptors. Fungicides achieve insecticidal effects by acting on pest-degrading enzymes to prevent their metabolic processes.

3. the effectiveness of insecticides
the effectiveness of
insecticides is mainly related to its formulation, concentration, mechanism of action and application methods. Generally speaking, the effect of powder and liquid pesticides is relatively strong, but it is also necessary to comply with the method of use and pay attention to safety, so as not to affect human health.

In addition, when using pesticides, you also need to pay attention to factors such as the living habits of pests and the iron period. For example, some pests are not easily killed in the hardcore stage and require the use of specific pesticides to achieve the best results.

4. Pesticide Safety

Although pesticides can effectively kill pests, there are also certain safety hazards. Some highly toxic and volatile pesticides are harmful to human health, and long-term exposure may lead to adverse reactions such as poisoning. Therefore, when using pesticides, you must follow the method of use, maintain ventilation and personal protection measures, and place the pesticides out of the reach of children to avoid accidents.

To sum up, the principle of pesticides is to achieve insecticidal effect by acting on the nerve or metabolic system of pests. Different pesticides have different mechanisms of action on pests, and appropriate pesticides need to be selected according to specific conditions. At the same time, we must also pay attention to the use method and safety issues to ensure the effectiveness and safety of pesticides.