The use of pesticides to control pests and diseases is not only effective, but also fast and convenient. It has already been accepted by the masses of farmers. However, because some people do not understand the basic knowledge of pesticides, there are five misunderstandings in the specific use, and the China Pesticide Network Xiaobian tells you one by one:
First, re-treatment and light prevention, no pests and diseases are not applied.
Under normal circumstances, the resistance of young larvae to pesticides is poor, and their resistance is also increasing with the increase of age. Therefore, the control of pests is most effective in the egg stage or the larval origin period. However, some farmers' friends often start to use drugs when the pests have already occurred, which has caused certain harms, and the effect of the medicaments is difficult to play. In the prevention and control of plant diseases, the mode of action of the fungicides, regardless of the protective fungicides, or therapeutic The fungicide should be applied only when the disease occurs and is prevalent. This has caused financial losses and has not played a role in disease prevention.
The second is not to control the object, see the medicine to use.
Some use insecticides to control plant diseases, some use fungicides to control pests, and even use herbicides to control pests and diseases, especially in the case of tight supply of pesticides. This way, you don't ask for indiscriminate use, blindly use drugs, and lightly delay the timing, affecting the effect, but also causing phytotoxicity, even crops.
The third is the long-term use of a single variety.
In the use of pesticides, once a certain pesticide is found to be effective, it will be used for a long time. Even if the effect of the drug on the pests is reduced, the variety is not changed, but the method of increasing the dosage is adopted, and the pests and diseases have not been recognized. Resistance to drugs still increases the dose, resulting in a vicious circle.
The fourth is to increase the concentration of drugs at will.
Some people do not use proportions when dispensing medicines, do not use special measuring tools, only use caps or other non-standard utensils. There is no quantitative concept, which generally exceeds the specified concentration, which not only causes waste, but also is prone to phytotoxicity, and also causes pests and diseases. Enhanced drug resistance.
The fifth is to confuse the concept of high efficiency and high toxicity, and lack of safety concept.
At present, high-quality pesticides are developing in the direction of high efficiency, low toxicity and low residue. Many farmers mistakenly believe that pesticides with high toxicity are effective, only subscribe for highly toxic pesticides, and lack understanding of low-toxic and high-efficiency pesticides. When pesticides are used, they are not used according to pesticide safety standards. Pesticides used on fruit trees, vegetables and raw crops are prohibited from being used in these crops, resulting in poisoning of humans and animals.
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