1. Rotation medication. Do not use a certain type of pesticide to control a certain pest for a long period of time. In this way, the formation process of pest-resistant populations can be cut off. The varieties used for rotation should use pesticides with different mechanisms, such as organophosphorus pesticides, pyrethroid pesticides, carbamate pesticides, biological pesticides, etc. The principle of insecticide is different and can be used interchangeably. The use of pesticides of the same type in rotation should be prudent, because pests can easily obtain cross-resistance, that is, when they become resistant to certain pesticides, they will also develop resistance to other pesticides of the same type, such as the anti-dimethoate artichoke. It is also resistant to dichlorvos and trichlorfon.
2. Mixed medication. The combination of two pesticides with different modes of action and mechanisms can slow the rate of occurrence of pest resistance. Even if drug resistance has been established, mixed drugs can inhibit the drug resistance. At present, the more successful programs for mixed drugs include: trichlorfon, dichlorvos and malathion; mixed use of pyrethroid insecticides and organic phosphorus insecticides; trichlorfon and phoxim, methyl parathion Mixed use; oil emulsion and organic phosphorus insecticide mixed use. It must be noted that compounded pesticides cannot be used for a long period of time and they must be used alternately. Otherwise, there is a danger of causing drug resistance, and even causing more resistance to pests.
3. Intermittent use or deactivation of pesticides. When a pesticide has caused resistance to a certain pest, such as stopping the use of the pesticide for a period of time, the insect resistance will gradually decline or even disappear. For example, parathion-induced resistance to spider mites, after several years of decommissioning, the drug resistance of spider mites can basically disappear. In this way, the effect of the medicament can still be restored.
4. Add synergist. The addition of synergists to pesticides can significantly activate pesticides, increase drug efficacy, and delay and inhibit pest resistance. If a small amount of diesel oil is added to omethoate to control the scale insects, and the soluble shell is immersed in the insects, the resistance of the scale insects to omethoate can be overcome. In addition to oil substances, commonly used synergists are neutral detergent, soy milk, vegetable oil and so on.
5. Diverse application methods. In addition to conventional sprays, pesticides may be applied in other methods such as mixed soils, baits for poisoning, soil application, applicators, drops, injections, etc. Different methods of drug use alternately to help prevent and Overcoming pests produce drug resistance.
6. Developed using soil pesticides. Soil pesticides have a wide range of sources and are simple to produce, and do not induce resistance to insect pests. At present, the soil pesticides to be developed are mainly plant-based pesticides such as tobacco and ramie. In addition, detergents, oils, quicklime, caustic soda, rosin, etc., are also good raw materials for making pesticides.
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