How to deal with the decline of pesticide control
NINGBO ZHENGUO INTELLINGENT LIGHTING CO.,LTD , https://www.zguolight.com
Not only pests, but also some diseases have the same kind of situation. This situation is often said that diseases and insects have developed resistance to certain pesticides, and the situation is quite serious. Therefore, we must raise awareness of this resistance and enhance prevention.
First, understand the categories of resistance. Different pest resistance is different, and its performance category is mono-resistance, that is, some pests only produce resistance to a certain pesticide that is frequently applied; second, it is multi-resistance, that is, some pests are mostly The applied pesticides produce different degrees of resistance; the third is cross-resistance, that is, a certain pest not only develops resistance to the applied pesticide, but also develops resistance to the first-time pesticide; Fourth, the group resistance is a certain A pest can produce resistance to certain types of pesticides (such as the pyrethroid series of pesticides); the fifth is negative cross-resistance, that is, when one pest develops resistance to one pesticide, it is more resistant to another pesticide. Sensitive. Only when the categories are distinguished can the differences be resolved.
Second, it is necessary to clarify the cause of drug resistance. First, some drug-resistant genes have long existed in some pests and have adaptability to certain drugs. Second, long-term administration of certain drugs can also form new drug-resistant genetic genes. Third, pests are in vivo. The enzyme activity of some pesticides is increased, which can relieve toxicity. Fourth, the increase of the body fat of the pests can increase the hiding of certain drugs and reduce the insecticidal ability.
Third, to prevent the occurrence of drug resistance, we must focus on the following corresponding measures. Alternate application of different varieties of pesticides. First, to prevent and control the same kind of pests, it is necessary to change different pesticide varieties frequently, and avoid simplification of the varieties; second, according to the information of pests and diseases predicted by the local agricultural authorities, the best medicines should be screened in the most effective time; After resistance to new pesticides, old conventional pesticides can be used after a period of time, such as the control of cockroach pests such as red spiders. When the stone sulphur mixture is applied again, it tends to have better effects. Mix and match different pesticides. First, the use of two or more pesticides with a large difference in insecticidal mechanism is used. For example, if an insecticide such as omethoate or malathion is mixed with a triazolone fungicide, it can treat aphids, aphids and wheat powdery mildew. Or the combination of malathion and fenvalerate, with systemic, stomach poisoning, contact killing effect, can treat both mites, mites and lepidoptera pests; second, the use of pesticides and synergists can improve Insecticidal efficiency. For example, with the use of new high-fat membranes, high-toxic pesticides can be modified for poisoning, poisoned pesticides are low-toxic, and low-toxic pesticides are slightly toxic. Control the volatile and volatile pesticides, prevent the rainwater from scouring, reduce the dosage per acre (half), and improve the control effect (multiple times). Can also be added to the foliar fertilizer to increase efficiency. (Yu Hongzhang)
Farmers Daily