In the control of pests and diseases, the single-agent gradually fades out of the stage of history. In order to increase the effectiveness of prevention and cure, both pesticides are popularized and applied. Compounding purpose 1 1. Increase prevention and control spectrum, each pesticide can control one or more kinds of harmful organisms, and after compounding, it can expand the types of prevention and control and reduce the number of medications; 2. Increase the control effect. Some pesticides can be provided with scientific control after being scientifically compounded. They can be used several times as they are used alone, thus reducing the amount of pesticides used; 3, to reduce resistance, a pesticide can easily produce drug resistance for a long time, and compounding can effectively relieve the resistance of the product. 4, comprehensive prevention and control of the most effective: For example, the crop is ill, certainly the crop itself immunity decreased, so the disease prevention and treatment should consider the formulation and collocation, such as treatment + nutrition at the same time, the effect is better. 5, high efficiency, long-lasting prevention and control effect: Generally, the systemic fungicide with systemic effect and the fungicide with protective function are compounded and used. The systemic fungicide is absorbed by the plant body and can be transported to various parts of the plant body to kill pathogens in the plant body. The fungicide, which has a protective effect, remains on the surface of the plant and prevents the invasion of pathogens. Pesticide compounding order 2 1. The order of pesticides must be accurately sorted. The order of mixing of foliar fertilizers and pesticides is usually: micro-fertilizers, water-soluble fertilizers, wettable powders, water dispersible granules, suspensions, micro-emulsions, water emulsions, liquids, and emulsifiable concentrates. , add in order (in principle, no more than three kinds of pesticides are mixed), stir and mix thoroughly after adding one, then add the next one 2. Add water first and then add drugs. When the two dilutions are mixed, it is recommended to add more than half a bucket of water to the sprayer and mix it after adding the first pesticide. Then, dilute the remaining pesticide in a plastic bottle, dilute it, pour it into the sprayer, mix it, and so on (if you want to be effective, don't be lazy). 3, regardless of what the mix of agents should pay attention to "now with the current, should not be put for a long time." Although the drug solution does not respond at the time of the dispensing, it does not mean that it can be stored for a long time. Otherwise, it will easily produce a slow reaction and gradually reduce the efficacy of the drug. Pesticide Mixing Principle 3 1. Mixing pesticides with different poisoning mechanisms The combination of pesticides with different mechanisms of action can increase the effectiveness of control and delay the development of insecticide resistance. 2, mixed with different poisoning pesticides Insecticides include contact, stomach poisoning, fumigation, and internal absorption. The fungicide has protection, treatment, internal absorption, etc. If these agents with different control effects are mixed together, they can complement each other and produce good results. Control effect. 3, mixed insecticides used in different insect states The combination of insecticides that act on different insect states can kill various insect pests in the field and kill them completely, thus improving the control effect. 4, pesticides with different aging Some kinds of pesticides have good effect of quick-effect prevention and control, but their effective period is short; some quick-effect control effects are bad, but they have a long duration of action. Mixing such pesticides not only has good control effect after application of pesticides, but also has the effect of long-term control. 5. Mixed with synergist Although synergists have no direct poisoning effect on pests and diseases, the use of pesticides can improve the control effect. 6. Pesticides that act on different pests and diseases When several diseases and insect pests occur at the same time, this method can reduce the number of spraying and reduce the working time, thereby improving the efficacy. Pesticide Mixing Notes 4 Although there are many advantages in using pesticides, they should not be mixed randomly. Unreasonable mixing is not only useless, but also has the opposite effect. Mixed pesticides should pay attention to the following points. 1, does not change the physical properties That is, no oil, flocculation, sedimentation, or discoloration can occur after mixing, and no phenomenon such as heat generation or bubble generation can occur. If the same powder, or the same as granules, fumigants, aerosols, can generally be mixed; 2, between different dosage forms Such as WP, EC, emulsion, suspension, water solvent and other liquid medium with water as a medium should not be mixed. 3, does not cause chemical changes 1 Including many pharmaceutical agents that cannot be mixed with alkaline or acidic pesticides. Carbamates, pyrethroid insecticides, thiram, diosmin, and other dithioamides under alkaline conditions such as Bordeaux mixture and lime sulfur mixture Formic acid bactericides are prone to hydrolysis or complex chemical changes, thereby destroying the original structure. 2 Under acidic conditions, 2,4-D sodium salt, 2A 4 sodium chloride salt, amitraz, etc. will also decompose, thus reducing the efficacy. 3 In addition to acidity and alkalinity, many pesticides cannot be mixed with drugs containing metal ions. 4 Dithiocarbamate fungicides, 2,4-D herbicides and copper preparations can produce copper salts to reduce the efficacy. 5 Thiophanate-methyl, thiophanate-methyl, and copper ions can lose their activity. 6 Remove copper preparations, other preparations containing heavy metal ions such as iron, zinc, manganese, nickel and other preparations, be careful when mixing. 7 Lithosulphide mixed with Bordeaux mixture can produce harmful copper sulfide and also increase soluble copper ion content. 8 Propene, butachlor, etc. cannot be mixed with organic phosphorus and carbamate insecticides. Some chemical changes may cause phytotoxicity. 4. Cross-resistance pesticides should not be mixed For example, the bactericide carbendazim and thiophanate-methyl have cross-resistance. Mixing can not only delay the growth of the bacteria, but also accelerate the development of drug resistance. 5, biological pesticides should not be mixed with fungicides Many pesticide bactericides have a lethal effect on biological pesticides. Therefore, microbial pesticides and bactericides must not be mixed. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone Guangzhou Zhongzhinan Supply Chain Co.,Ltd. , https://www.gzzhongzhinan.com