The right medicine is the right symptomatic medication for the target and its occurrence. The performance of various pesticides is different, and the control objects are also different. Each kind of medicine has its specific range of special effects, and it should be controlled according to different control objects to obtain the proper control effect. Door Stoppers, Magnetic Door Stopper, Stainless Steel Door Stopper ONLY DOOR GROUP Ltd , http://www.doors-only.com
Appropriate use of various pests and diseases in different stages of growth and development, the resistance to chemicals is very different, to grasp the key opportunities for pest control, based on predictions and investigations, to understand the pests and diseases The dynamics of development have taken place, and the weak links have been grasped to achieve the desired effect. In general, insecticides in the lower larval stage of pests (before 3 years old), bactericides before or at the onset of the disease, contact herbicides in the seedling stage after emergence of weeds, before the sterilized herbicides are planted or transplanted, Farmland rodent in the autumn, a large number of rats foraging for wintering or spring before the winter rat breeding.
Appropriate use of drugs to select appropriate application methods can not only make full use of the drug effect, but also reduce costs, and is also safe for crops. It should be properly selected according to the target of the control, the characteristics of the drug, and the growth period of the crop. At present, our common application methods are spray, dusting, seed dressing, filling, smearing, etc., each with its own advantages and disadvantages. For spray application, the height and angle of the nozzle should be flexibly controlled according to the control object, the different growth period of the crop and the location of the pests and diseases, so as to ensure the uniform spraying of pesticides and improve the utilization rate of pesticides. For the flying and flying pests such as the flying cockroach, the hummer, the spider mites, etc., the application should start from the periphery of the field, and the method of “cofferdam†should be adopted, the control effect will be better, and the rice field can be controlled by tricyclazole. The leaf transplanting method of the leafhopper is better than the Daejeon spray, which saves labor, saves medicine and has good control effect.
The basic principle of proper dosage of drugs is "economical and effective, and control the benefits." The dosage should be increased or decreased as appropriate according to the temperature. The more the pesticide is applied, the better the effect. The excessive dosage not only causes economic waste, but also may cause phytotoxicity to the crop; on the contrary, the dosage is too small to achieve the purpose of prevention and control. Do not rely on customary experience to increase the dose and increase the concentration. It is both wasteful and prone to poisoning, and it is easy to speed up the resistance of pests and diseases. For new varieties of pesticides that have just begun to be used in the local area, low doses of effective doses should generally be used, which will help reduce the cost of prevention and delay the resistance of pesticides.
The number of pesticides applied in appropriate doses should be determined according to the length of the disease, the size of the occurrence, and the duration of the drug. In general, the number of times a pest has a long period of occurrence and the amount of occurrence is increased.
Rotating medications often use several different types of pesticides, which is an effective measure to prevent pests and germs from developing resistance. Because a long-term use of a pesticide to control a pest and disease, it is easy to make the bacteria or pests resistant, reducing the control effect. A pest or pathogen that resists an agent and is often resistant to other agents of the same type. However, different types of agents have different toxic effects on pests or pathogens, and pests or germs do not exhibit drug resistance.
Mixed use of two or more pesticides with different toxicological effects on pathogens or pests can simultaneously treat several diseases and insect pests. This is to expand the scope of prevention and control, improve drug efficacy, reduce toxicity, and seize the favorable opportunity for prevention and treatment. Effective measures to save labor. Mixed medications must pay attention to which drugs and which drugs can not be mixed, otherwise errors will occur. For example, fungicides cannot be mixed with biological fungi; pesticides that produce flocculation or large amounts of sediment after mixing cannot be mixed with each other; acidic and alkaline pesticides cannot be mixed, and pesticides that fail to be decomposed by alkaline substances cannot be mixed with alkaline pesticides. Mixed use; pesticides that are easy to cause plant phytotoxicity after mixing, can not be mixed.
The safe use of pesticides is to control pests and ensure a bumper harvest. However, if used improperly, it will pollute the environment and agricultural products, and even cause poisoning or death of humans and animals. Therefore, farmers must pay attention to the scope of use and safety interval of pesticides when using pesticides. In particular, the use and prohibition of high-toxicity and high-residue pesticides should be clear, and they should not be used or abused everywhere. For safety, work should be started from the downwind when spraying pesticides. According to the wind direction, the spray direction of the nozzle is determined so that the spray direction and the wind direction are as consistent as possible, and the travel path of the operator should be perpendicular to the wind direction, and the wind can not be operated.
This article is published by the China Pesticide Network . Please indicate the source.