At present, the safety of agricultural products is getting more and more attention. The drug residue of vegetables is a realistic problem that we cannot avoid. How to use pesticides scientifically is the basic skill that most vegetable growers should master.
1. Selection of pesticide varieties.
In the actual production, we should try to avoid drug abuse and drug abuse. At present, the pesticides allowed on vegetables are biologically derived pesticides, mainly including microbial pesticides, such as microbial pesticides, animal-derived pesticides, such as insect pheromone pesticides, plant-derived pesticides, such as insecticides, fungicides, synergists, minerals. Source pesticides, such as inorganic acaricides, mineral oil emulsions, etc.
2. Reasonably arrange the time of application.
After the diagnosis of pests and diseases, according to the occurrence law of the pests and the appropriate period of prevention and control, select the varieties of pesticides with good control effect and low residual amount to determine a reasonable control time. At the same time, the safety of the applicator and the crop should be considered to avoid the application of the drug during the high temperature period or the sensitive period of the crop, so as to avoid poisoning of the applicator or phytotoxicity of the crop.
3. Application method.
Due to the different control objects, the application methods are also different. It is necessary to fully consider the performance characteristics of the control object, the type of the drug, and the application device, so that the proper function can be exerted to evenly distribute the agent on the surface of the crop or the pest. Achieve scientific and effective control effects. For underground pests, it is often necessary to apply powder, granules or drenched liquid.
4. Avoid long-term use of a single pesticide.
In order to avoid the emergence of drug resistance, growers should mix and use pesticides in a reasonable manner. Pay attention to the problems of pesticide compounding: First, the resistance mechanism of pests to each component of mixed pesticides should be different, and the residual period of each component in mixed pesticides should be similar; Pre-sex pesticides have a role to play; third, pesticides should be selected for different mechanisms of pesticides, so as to avoid the formation of cross-resistance, in order to delay the resistance of pests to certain pesticides, it should also consider the rationality of several different types of pesticides. The use of the wheel has a greater effect on prolonging the service life of the pesticide and improving the control effect.
5. The dose of the application.
When applying the drug, different dosages should be considered to select the appropriate dosage. When all kinds of pesticides are used, they should be used according to the recommended dosage instructions in the product introduction manual, and the dosage should be strictly controlled, and can not be increased or decreased arbitrarily. When the operation is not only the amount of the drug, the amount of water is accurate, but also the area should be accurate, in order to truly achieve accurate drug use, to achieve better control results. In addition, the number of times of application should be reduced as much as possible.
6. Rational use of integrated prevention methods.
Pesticide control should be combined with Other relevant prevention methods to receive better control effects, especially the combination of chemical control and agricultural control can often achieve twice the result with half the effort.
1. Selection of pesticide varieties.
In the actual production, we should try to avoid drug abuse and drug abuse. At present, the pesticides allowed on vegetables are biologically derived pesticides, mainly including microbial pesticides, such as microbial pesticides, animal-derived pesticides, such as insect pheromone pesticides, plant-derived pesticides, such as insecticides, fungicides, synergists, minerals. Source pesticides, such as inorganic acaricides, mineral oil emulsions, etc.
2. Reasonably arrange the time of application.
After the diagnosis of pests and diseases, according to the occurrence law of the pests and the appropriate period of prevention and control, select the varieties of pesticides with good control effect and low residual amount to determine a reasonable control time. At the same time, the safety of the applicator and the crop should be considered to avoid the application of the drug during the high temperature period or the sensitive period of the crop, so as to avoid poisoning of the applicator or phytotoxicity of the crop.
3. Application method.
Due to the different control objects, the application methods are also different. It is necessary to fully consider the performance characteristics of the control object, the type of the drug, and the application device, so that the proper function can be exerted to evenly distribute the agent on the surface of the crop or the pest. Achieve scientific and effective control effects. For underground pests, it is often necessary to apply powder, granules or drenched liquid.
4. Avoid long-term use of a single pesticide.
In order to avoid the emergence of drug resistance, growers should mix and use pesticides in a reasonable manner. Pay attention to the problems of pesticide compounding: First, the resistance mechanism of pests to each component of mixed pesticides should be different, and the residual period of each component in mixed pesticides should be similar; Pre-sex pesticides have a role to play; third, pesticides should be selected for different mechanisms of pesticides, so as to avoid the formation of cross-resistance, in order to delay the resistance of pests to certain pesticides, it should also consider the rationality of several different types of pesticides. The use of the wheel has a greater effect on prolonging the service life of the pesticide and improving the control effect.
5. The dose of the application.
When applying the drug, different dosages should be considered to select the appropriate dosage. When all kinds of pesticides are used, they should be used according to the recommended dosage instructions in the product introduction manual, and the dosage should be strictly controlled, and can not be increased or decreased arbitrarily. When the operation is not only the amount of the drug, the amount of water is accurate, but also the area should be accurate, in order to truly achieve accurate drug use, to achieve better control results. In addition, the number of times of application should be reduced as much as possible.
6. Rational use of integrated prevention methods.
Pesticide control should be combined with Other relevant prevention methods to receive better control effects, especially the combination of chemical control and agricultural control can often achieve twice the result with half the effort.
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