It is not advisable to use excessive pesticides to kill insects.

In rural areas, farmers often encounter such a phenomenon: when giving medicine, farmers do not know what pesticide they use, nor how many times the pesticide should be blended, but only know how many caps a bucket of water is mixed with (pesticide bottle cap). This is the true portrayal of most Chinese farmers using pesticides nowadays. Of course, this situation is not only related to the low cultural level of farmers, but also to the lack of publicity and popularization of pesticide knowledge. In the past, farmers were familiar with many pesticide names. With the withdrawal of batches of highly toxic pesticides from the market, especially after the withdrawal of five types of organophosphorus pesticides from the market in 2007, many environment-friendly and new dosage forms appeared. Farmers know little or nothing about these new pesticides. Including many pesticide dealers have not really followed the change in thinking, do not really realize the significance of banning highly toxic pesticides, and even operate with the mentality of a bystander: farmers can use whatever medicine they like, and they can use it as much as they like. As long as they can sell the medicine, they can make money. It is under such circumstances that the popularization of pesticide knowledge has become a blind area: government departments only send out red-headed documents, but no one will really do it, and dealers dealing with farmers have such a mindset that it is none of their own business. naturally, the propaganda and popularization of farmers' pesticide knowledge has come to naught. In addition, pesticide dealers do not have high quality, lack relevant knowledge, and do not know how to learn, so they can only buy and sell pesticides with an irresponsible and taken-for-granted attitude, thinking that farmers only need to kill insects with drugs. therefore, some dealers deliberately let farmers increase the amount of medicine, and according to the size of pesticide bottle caps, farmers are taught to mix a bucket of water with several bottle caps at will, and those with small bottle caps allow farmers to exchange 3 caps, 4 caps, or even 5 caps and 6 caps. In short, encourage farmers to increase the use of drugs, which can not only increase the sales of pesticides, but also enhance the insecticidal effect, as for environmental protection, residues, drug damage, and so on, these dealers do not consider. In addition, when many farmers take the medicine, if they take the medicine according to the dose recommended in the instructions, the insecticidal effect is often not ideal or does not work at all (pests produce resistance, or manufacturers deliberately inflate the label, exaggerating the efficacy). They also tend to multiply the dosage at the recommended dose at will. Many dealers are afraid that the farmers will figure it out and think that the more they don't understand, the more they believe what he says, which is more helpful for him to sell freely. For example, farmers clearly have a drug to control aphids, but the dealer deliberately said that the drug could not be used and asked the farmer to buy another one he recommended. In this way, a pest sells a pesticide, which increases farmers' investment and destroys the environment.