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If powder, wettable powder, soluble powder have agglomeration phenomenon; water agent has a turbid phenomenon; emulsifiable concentrate is opaque; powder in granules is too much, etc., the above pesticide is not a pesticide or inferior pesticide. In addition, the purchase of pesticides should pay attention to pesticides more than one drug or more than one drug, do not buy wrong, especially pesticides. For example, Dagong Chen, Sijihong, once-in-a-net, fluke, imidacloprid, etc. are all 10% imidacloprid wettable powders, which belong to more than one medicine; while the same pesticides called rice insect net, some are insecticidal and BT. The compounding agents are compounding agents of pyrethroid pesticides and organophosphorus pesticides, and some of them are mixtures of several organophosphorus pesticides. Although the drug names are the same, the active ingredients are very different.
Precautions for farmers when applying pesticides:
The first is to apply the drug symptomatically and apply the drug in a timely manner. First of all, we must accurately identify the types of pests and diseases, determine the key targets for prevention and control, and select the appropriate pesticide species and dosage forms according to the occurrence period and occurrence level. To prevent and treat diseases, spray the protective agent before the occurrence of the disease. After the occurrence of the disease, spray the therapeutic agent. Prevention and treatment of diseases should be based on the principle of first-protection and post-treatment, seize the best timing of application, and use drugs several times to achieve good results.
The second is to use drugs rationally. In the case of ensuring the control effect, do not blindly increase the amount of drug, concentration and frequency of application, overdose is prone to phytotoxicity. In the range of effective concentration, the use of low-concentration drugs should be used as far as possible to prevent and control. The number of prevention and cure should be determined according to the residual effect period of pesticides and the occurrence of pests and diseases.
The third is to pay attention to the method of application. Different formulations of pesticides should use different methods of application. General emulsions and wettable powders are mainly sprayed and splashed; dusts are mainly dusted; granules are mainly spread or deep-based; powders with strong suction are sprayed, sprayed, poured, coated Stems can be. Pesticides with different mechanisms of action should also adopt different methods of application in order to achieve the highest control efficiency. According to the location of the disease, the pest activity patterns and different pesticide formulations, choose different methods of application and application time.
Before purchasing pesticides, determine the types of pests and diseases that need to be controlled, what they attend, and what they should do before they can choose pesticides. When purchasing drugs, we must carefully identify the labels and instructions for pesticides. All qualified commercial pesticides are marked on the labels and instructions with the name of agricultural products, the content of active ingredients, registered trademarks, batch number, production date, shelf life, and there are three serial numbers - pesticide registration certificate. No., Approval No., Product Standard No., with product specification and certificate. Do not buy pesticides with incomplete certificates. In addition, we must carefully inspect the packaging of pesticides. Do not purchase pesticides with unclear or unidentifiable labels and instructions.