Due to the large-scale use of chemical pesticides, coupled with the lack of basic knowledge of the use of pesticides by many flower farmers, improper use of drugs has led to more and more resistant species of flower and tree pests, and the degree of resistance is increasing. The following methods can be used to prevent pest resistance:
First, the rotation of drugs: Do not use a certain pesticide for a long time to control a certain pest, so that the formation process of pest-resistant populations 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. For example, the Jerusalem artichoke, which is also resistant to dimethoate, also develops resistance to dichlorvos and trichlorfon.
2. Mixed use: Mixing two pesticides with different modes of action and mechanism can slow down the rate of resistance of pests. Even if drug resistance has been formed, mixed drugs can inhibit the drug resistance. At present, the successful solutions for mixed drugs are: trichlorfon, dichlorvos and malathion, pyrethroid insecticides mixed with organophosphorus pesticides, trichlorfon and phoxim, methyl parathion Mixed, oil emulsion mixed with organophosphorus pesticides. It must be noted that 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 causing multi-resistance of pests.
3. Intermittent use or deactivation of pesticides: When a pesticide has already caused resistance to certain pests, such as stopping the use of the pesticide for a period of time, the resistance of the pest will gradually decrease or even disappear. If parathion causes resistance to red spiders, the resistance of spider mites can almost disappear after several years of inactivity. In this way, the effect of the medicament can still be restored.
4. Adding synergist: Adding 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. Diverse methods of pesticide use: In addition to conventional spraying, other methods can be used, such as mixing toxic soil, making bait, applying soil, applying medicine, dropping medicine, injecting medicine, etc. It helps prevent and overcome the resistance of pests.
Sixth, the development and use of soil pesticides: soil pesticide raw materials from a wide range of sources, simple to make, will not induce resistance to pests. At present, the soil pesticides to be developed are mainly plant pesticides such as tobacco, ramie, ramie and garlic. In addition, washing powder, oil, quicklime, caustic soda, rosin, etc., are also good raw materials for soil-based pesticides.
First, the rotation of drugs: Do not use a certain pesticide for a long time to control a certain pest, so that the formation process of pest-resistant populations 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. For example, the Jerusalem artichoke, which is also resistant to dimethoate, also develops resistance to dichlorvos and trichlorfon.
2. Mixed use: Mixing two pesticides with different modes of action and mechanism can slow down the rate of resistance of pests. Even if drug resistance has been formed, mixed drugs can inhibit the drug resistance. At present, the successful solutions for mixed drugs are: trichlorfon, dichlorvos and malathion, pyrethroid insecticides mixed with organophosphorus pesticides, trichlorfon and phoxim, methyl parathion Mixed, oil emulsion mixed with organophosphorus pesticides. It must be noted that 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 causing multi-resistance of pests.
3. Intermittent use or deactivation of pesticides: When a pesticide has already caused resistance to certain pests, such as stopping the use of the pesticide for a period of time, the resistance of the pest will gradually decrease or even disappear. If parathion causes resistance to red spiders, the resistance of spider mites can almost disappear after several years of inactivity. In this way, the effect of the medicament can still be restored.
4. Adding synergist: Adding 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. Diverse methods of pesticide use: In addition to conventional spraying, other methods can be used, such as mixing toxic soil, making bait, applying soil, applying medicine, dropping medicine, injecting medicine, etc. It helps prevent and overcome the resistance of pests.
Sixth, the development and use of soil pesticides: soil pesticide raw materials from a wide range of sources, simple to make, will not induce resistance to pests. At present, the soil pesticides to be developed are mainly plant pesticides such as tobacco, ramie, ramie and garlic. In addition, washing powder, oil, quicklime, caustic soda, rosin, etc., are also good raw materials for soil-based pesticides.
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