As the weather changes, the temperature decreases. Greenhouses are the best choice for vegetable growers to grow vegetables. However, due to the special ecological environment in the greenhouse, various pests and diseases are easily caused throughout the year. To effectively control pests and diseases, pesticides must be used scientifically and correctly. The following article summarizes the following points. 1, a reasonable mix can be added to the pesticides with appropriate fertilizer or foliar micro-fertilizer. But be careful: when mixing, you must first understand the characteristics of various drugs, otherwise, it is counterproductive. For example, the bactericides such as zinc or dexamethasone are easily decomposed in the presence of alkaline substances, and cannot be mixed with the stone sulphur mixture or Bordeaux mixture. 2, the right medicine to accurately distinguish whether the crop is a physiological disease or an invasive disease, confirm the type of pests and diseases that occur, to achieve the right medicine. 3, timely use of drugs according to the law of the occurrence of pests and diseases, should be applied in the early stages of pests and diseases, pests and diseases control in the stage of spotting, to prevent spread. Taking into account the warm and humid environment in the shed, it is not advisable to spray on rainy days or high temperatures to prevent excessive humidity in the shed and reduce the efficacy. Under high temperature conditions, sulfur preparations are used to control melon and vegetable diseases to avoid phytotoxicity. 4, even after the occurrence of pest control pests and diseases, it is generally necessary to continuously prevent 2-3 times, each interval of 7-8 days. During the prevention and treatment process, it is necessary to pay attention to the rotation of drugs, and rationally use pesticides of different types and different mechanisms of action. For example, omethoate belongs to organophosphorus pesticides, and enemy killers belong to pyrethroid pesticides. Their mechanism of action is different. If you pay attention to rotation, you can avoid or delay the occurrence of pest and disease resistance. 5, the standard application of drugs in strict accordance with the use of the concentration and dosage of drugs, spray spray, spray must be comprehensive and uniform, the drug spray is generally carried out in the morning, in order to ventilate the temperature inside the shed, reduce the humidity inside the shed . Aerosols are generally used after closing the greenhouse in the evening, and attention should be paid to fire prevention. 6. Safe use of drugs In the production of vegetables, high-efficiency, low-toxic, low-residue pesticides should be used. It is forbidden to increase the concentration of the liquids at random. The number of times of use should not be too much. The drugs should be used strictly according to the interval to prevent the occurrence of phytotoxicity and reduce pesticide residues. . At the same time, the use of highly toxic pesticides such as organochlorine, carbofuran and methamidophos should be strictly prohibited. 7. Correct selection of drugs Each pesticide has a certain scope of prevention and control. Before use, it is necessary to understand the performance and use of pesticides. According to the characteristics of the pests in the shed and the correct selection of drugs, the target is targeted. In rainy and snowy weather, dust is generally used to reduce the humidity in the shed. More pesticide knowledge , please pay attention to China Pesticide Network Octadecylamine Uses,Octadecylamine Solubility,Primary Amine As Lubricant,Primary Amine Octadecylamine Sichuan Tianyu Oleochemical Co., Ltd , https://www.sclthoil.com
Greenhouse vegetables medication attention points