Since chemical pesticides are applied in large quantities in production, especially the same pesticide is applied multiple times and for many years, the pests and diseases are resistant. Practice has proved that as long as the rational application of pesticides, can delay or delay the emergence and development of drug resistance.
1. Comprehensive prevention and control, reducing the number of chemical prevention and control. Improve the agricultural ecological environment, protect the use of natural enemy organisms; strengthen the forecast and forecast of pests, timely prevention and control; organically combine agricultural technical measures, chemical control and biological control, and change the simple method of relying on chemical pesticides.
2. Rotational medication should not be applied to a single variety of agents for a long time to cut off the formation of resistant populations in the biological population. Varieties with different mechanisms of action should be selected as far as possible for the varieties to be applied by rotation. For example, insecticides are classified into organophosphorus preparations, pyrethroid ester preparations, carbamate preparations, organic nitrogen preparations, and biological preparations, and their mechanisms of action vary. Pesticide varieties in the same type of preparations can also be used interchangeably, but it must be ascertained that there is no cross-resistance between them. The number of application times is preferably 1 or 1 time. Among the fungicides, general systemic fungicides are more likely to cause drug resistance, such as benzoimidazole fungicides (carbendazim, thiophanate, etc.), antibiotics and other fungicides, and contact fungicides are not easy to cause drug resistance. Therefore, it is a better rotation combination, such as Daisen, inorganic sulfur preparations, copper preparations, and is also a better rotation variety.
3. Mixed use of two or more pesticides with different insecticidal (disease) principles, or adding a small amount of synergist, can not only improve the control effect of pesticides, but also overcome or delay the emergence of drug resistance.
4. Intermittent use or deactivation of pesticides When a pesticide has already been tested for resistance, if it is applied within a short period of time, the drug may gradually decrease or even disappear. For example, the resistance of 1059, 1605 on cotton buds, after several years of inactivation, drug resistance can basically disappear.
5, the correct application of the technology of the correct application of pesticide technology, including the choice of pesticide types, dosage forms, application concentrations, methods and drug quality, etc., have a certain effect on improving control and delaying the emergence of resistance to pests and diseases.
1. Comprehensive prevention and control, reducing the number of chemical prevention and control. Improve the agricultural ecological environment, protect the use of natural enemy organisms; strengthen the forecast and forecast of pests, timely prevention and control; organically combine agricultural technical measures, chemical control and biological control, and change the simple method of relying on chemical pesticides.
2. Rotational medication should not be applied to a single variety of agents for a long time to cut off the formation of resistant populations in the biological population. Varieties with different mechanisms of action should be selected as far as possible for the varieties to be applied by rotation. For example, insecticides are classified into organophosphorus preparations, pyrethroid ester preparations, carbamate preparations, organic nitrogen preparations, and biological preparations, and their mechanisms of action vary. Pesticide varieties in the same type of preparations can also be used interchangeably, but it must be ascertained that there is no cross-resistance between them. The number of application times is preferably 1 or 1 time. Among the fungicides, general systemic fungicides are more likely to cause drug resistance, such as benzoimidazole fungicides (carbendazim, thiophanate, etc.), antibiotics and other fungicides, and contact fungicides are not easy to cause drug resistance. Therefore, it is a better rotation combination, such as Daisen, inorganic sulfur preparations, copper preparations, and is also a better rotation variety.
3. Mixed use of two or more pesticides with different insecticidal (disease) principles, or adding a small amount of synergist, can not only improve the control effect of pesticides, but also overcome or delay the emergence of drug resistance.
4. Intermittent use or deactivation of pesticides When a pesticide has already been tested for resistance, if it is applied within a short period of time, the drug may gradually decrease or even disappear. For example, the resistance of 1059, 1605 on cotton buds, after several years of inactivation, drug resistance can basically disappear.
5, the correct application of the technology of the correct application of pesticide technology, including the choice of pesticide types, dosage forms, application concentrations, methods and drug quality, etc., have a certain effect on improving control and delaying the emergence of resistance to pests and diseases.
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