How do agricultural planting reduce pest and disease resistance? First, rotate (alternate) medication. It is the use of pesticides with completely different mechanisms of action during a certain growth period of the plant. This will increase the effectiveness of the control and extend the useful life of certain excellent pesticides. For example, pesticides such as organophosphorus preparations, pyrethroids, carbamate preparations, organic nitrogen preparations, and biological preparations have different mechanisms of action. Pesticide varieties in the same type of preparation can also be used interchangeably, but it is necessary to know whether there is cross-resistance between them.
The second is a reasonable mix. Mixing agents with different modes of action and mechanisms can also slow the rate of drug resistance. For example, organic phosphorus and pyrethroid pesticides are used in combination. Single point pesticides are mixed with traditional pesticides with multiple points, and the effect is better. It should be noted that the mixed pesticides can not be used for a long time, and it is necessary to rotate the drugs, otherwise it will also cause drug resistance.
The third is intermittent medication. When a drug is resistant, if it is stopped for a period of time, the drug resistance may gradually decline or even disappear. For example, the resistance caused by monocrotophos, after a few years of inactivity, the drug resistance basically disappears.
The fourth is scientific application. It is essential that the effective dose and deposition distribution of the agent in the field is uniform. For different plants and different pests, appropriate application techniques should be used. Do not increase the dosage and increase the number of medications, so that the dosage is smaller. The dosage can obtain better control effect.
The fifth is the application of synergists. Adding a certain amount of synergist to some pesticides is a very effective way to delay or overcome the resistance of pests and diseases. It is worth noting that the synergist used must be an authentic and pure synergist, not a pesticide-added formulation.
Sixth is comprehensive prevention and treatment. The occurrence of pests and diseases is related to various factors such as soil, climate, cultivation management, etc., and a single control measure, especially chemical control, is easy to produce drug resistance. The combination of chemical control, biological control, etc. can be organically combined for comprehensive prevention and control, so as to achieve the purpose of inhibiting and preventing drug resistance. Jinnong
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