In the application of pesticides , it is necessary to rationally select the medicine and the right medicine. On the basis of fully understanding the performance and use of pesticides, according to the types of pests and diseases, select the appropriate pesticide type or dosage form.
1 to be used regularly
According to the law of occurrence of pests and diseases, the best prevention and treatment period should be strictly controlled. It is necessary to prevent and control the disease at the early stage of the disease, control its disease center, prevent its spread and development, and it is difficult to prevent and control once the disease occurs and spreads a lot; for pests and diseases, it is required to cure, treat, treat, and reach the advanced age. The control effect is much worse. Different pesticides have different properties, and the control period is different. Biological pesticides have a slower effect and should be used 2 to 3 days earlier than chemical pesticides.
2 to use medicine scientifically
Pay attention to the alternate rotation of pesticides with different action mechanisms, which can not be singularized for a long time, prevent the occurrence of resistance of pathogenic bacteria or pests, and help to maintain the control effect and service life of the medicament. In the early stage of vegetable growth, high-efficiency and low-toxic chemical pesticides and biological pesticides were mixed or alternately used, and bio-pesticides were mainly used in the late growth stage. The use of pesticides should promote low-volume spray methods.
3 Select the correct spray point or part
According to the occurrence characteristics of different pests and diseases in different periods, the different parts of the plant were used as targets to carry out targeted application. To achieve the purpose of timely controlling the occurrence of pests and diseases, reducing the number of pathogens and reducing the number of insects, thereby reducing the use of drugs.
4 To implement pesticide safety intervals in strict accordance with the deadline
The safety interval of pyrethroid pesticides is 5~7d, the safety interval of organophosphorus pesticides is 7~14d, chlorothalonil, dexamethasone and carbendazim in bactericide are more than 14d, and the rest are 7~10d. Pesticide blending uses a safe interval between the active ingredients that perform the most residue.
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