Pesticides cannot be used for immediate use

Due to the influence of the climate, smuts in some places are particularly serious this year. In order to control the spread of the disease and improve the control effect, some vegetable farmers used triadimefon, tebuconazole and other fungicides to control green onions rust more than a few times, and the interval between medications was also shortened. Excessive amounts and frequent use of these bactericides can indeed control the current rust, but it also leaves a hidden danger for the next crop.

An agricultural technician, Wang Lunshi, told the author: “After welsh onions are harvested, most of the cabbages, cabbages, and potatoes in the spring of next year will be contaminated by soils such as triazolam and other fungicides. Forming a certain amount of residue in the soil, the spring of next year is likely to affect the normal growth of the crop."

As he said, triazole bactericides, that is, bactericides with “azole”, such as triadimefon, tebuconazole, flusilazole, and propiconazole, have inhibitory effects on crops and should be used in strict accordance with regulations. Concentration use, can not be over-used, otherwise light to inhibit the growth of the crop in the season, in severe cases affect the growth of pods or more crops, especially paclobutrazol residue in the soil for a longer time.

In recent years, it has been not uncommon to see cases of reduced crop production due to overuse of pesticides. A farmer in a certain place controlled the peanut growth due to excessive use of paclobutrazol on peanuts, resulting in suppression of the next crop; in some vegetable growing areas, farmers increased the herbicide concentration to increase the herbicide concentration, resulting in the next crop Reduced production or even no income.

This type of non-compliance with the use of pesticides, the blind pursuit of immediate effects, and the practice of disregarding the safety of the crops in the next season, exist in a considerable number of farmers, which is highly undesirable. For a long period of time, some farmers have a wrong understanding that the amount of medicine used is not enough, as long as the dosage of pesticides can increase the control effect. Actually, there are many reasons that affect the effectiveness of pesticide control. In addition to choosing the correct concentration of use, there are many aspects related to temperature, planting structure, planting varieties, management models, timing of prevention, timing of medication, and methods of administration. Only one-sided increase in the amount of pesticides will make certain bacteria and pests more susceptible to drug resistance, resulting in more and more medication, diseases and insect pests more and more difficult to cure. Overdosing will not only cause great waste, but also lead to excessive pesticide residues, which will cause agricultural products to be sold at a price that is too low. Some pesticides may affect the normal growth of the next season or multiple crops due to soil residues. , It is a kind of pollution to soil, water source and even the whole ecological environment. It can be said that there is no harm.

Such unscientific drug habits need to be reversed as soon as possible. For farmers, it is particularly necessary to change old concepts, prevent diseases and treat pests, and also have a long-term perspective. It is mainly prevention, comprehensive prevention and control, attention to reasonable cultivation, and grasping the law of occurrence of diseases and pests. Live the best control period, the limited use of pesticides on the "edge", so that the most economical way to achieve the best control effect.

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