First, rotation medication
Do not use a certain pesticide for a long time to control a certain pest, so that the formation process of the pest-resistant population can be cut off. Varieties with different mechanisms of action should be used as far as possible for the varieties used for rotation. Such as organophosphorus pesticides, pyrethroid pesticides, carbamate pesticides, biological pesticides, etc., the insecticidal principles are different, can be used interchangeably. The rotation of the same type of pesticide should be used with caution, because the pest is easy to obtain cross-resistance, that is, after resistance to a certain pesticide, it will also be resistant to other varieties of the same kind.
Second, mixed medication
The combination of two pesticides with different modes of action and mechanism can slow the occurrence of pest resistance. Even if drug resistance has been formed, the mixed drug can inhibit the drug resistance. Previously, successful solutions for mixed drugs were: mixed with pyrethroid insecticides and organophosphorus pesticides; trichlorfon was mixed with phoxim; and oil emulsions were mixed with organophosphorus pesticides.
It must be noted that the mixed pesticides can not be used for a long time alone, and should be rotated. Otherwise, there is also a risk of causing drug resistance, and even the pests may cause multiple drug resistance.
Third, the intermittent use or deactivation of pesticides
When a pesticide has already caused resistance to a certain pest, such as stopping the use of the pesticide for a period of time, the resistance of the pest will gradually decrease or even disappear. For example, some organophosphorus pesticides cause resistance to red spiders. After several years of inactivity, the resistance of spider mites can almost disappear. In this way, the effect of the medicament can still be restored.
Fourth, add synergists
Adding a synergist to the pesticide can obviously activate the pesticide, improve the efficacy, delay and inhibit the resistance of the pest. For example, adding a small amount of diesel to the omethoate to control the scale insects can dissolve the clam shells and make the pesticides enter the pests, overcoming the resistance of the scale insects to omethoate. In addition to oily substances, commonly used synergists are neutral detergents, soy milk, vegetable oils and the like.
V. Diversified methods of application
In addition to the conventional spray, other methods, such as mixing toxic soil, making bait, soil application, applicator, dripping, smoking, etc., can be used in different ways. Overcome pests to develop resistance.
6. Development and use of soil pesticides
The soil pesticide raw materials are widely used, and the preparation is simple, and the pests are not induced to resist. At present, the soil pesticides to be developed are mainly plant pesticides such as tobacco, ramie, garlic, pepper water, and leek. In addition, washing powder, oil, quicklime, caustic soda, rosin, etc., these are good raw materials for the deployment of soil pesticides.
(Jiande today, Zhao Shuaifeng)
This article URL: Six measures to delay the development of resistance to pests
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