Misunderstanding 1, just the disease, no drugs, no insects, no drugs, most pests and diseases in the early stage of the disease, the symptoms are very light, such as cotton blight, the early use of fungicides in the early stage of the disease is good, after a large area of ​​outbreak, that is, the use of drugs many times, the loss is also It's hard to recover. Helicoverpa armigera is easy to control before the third age, but at this time the worm is small and harmful, and it is difficult for the naked eye to distinguish. Therefore, most bactericidal and insecticides are not effective, but miss the best use time. Graphite Electrodes mainly use needle coke, petroleum coke, as raw material, coal pitch as binder, calcination, ingredients, kneading, molding, baking and graphitization, machining and made, which is released in electric arc furnace in the form of arc conductor of electricity to heat melting furnace charge, Graphite Electrode with low resistivity, graphite electrode good conductivity, graphite electrode low ash, graphite electrode uniform and compact structure, good oxidation resistance, high mechanical strength, etc. Uhp 300 Graphite Electrode,Uhp 300 Electrode,Uhp 300Mm Graphite Electrode,300Mm Graphite Electrode Uhp Carbographite Industrial PTE.LTD , http://www.carbographite.com
Misunderstanding 2, the higher the concentration of the chemical liquid, the better the farmers use pesticides , in order to reduce the workload, often add more drugs, less water. A sprayer syrup (about 15 kg) can spray 1 mu of crops. In fact, in the effective concentration of pesticides, the effect depends on the coverage of the liquid. For example, when spraying the soil-blocking herbicide "Dilamine", if the soil moisture is poor, the amount of water must be increased to form a closed film. Otherwise, The liquid medicine is only distributed in spots, and the herbicidal effect is not achieved. When spraying insecticides and fungicides , sufficient water consumption is necessary, because the eggs and germs are concentrated in the soil on the back of the leaves and in the roots of the roots. When the application is small, it is difficult to spray the whole plant. The residual eggs and residual bacteria in the dead corner can easily erupt again. Increasing the concentration can also enhance the drug resistance of germs and pests, and phytotoxicity will occur if the concentration is exceeded. When the foliar fertilizer is used at a high concentration, it can not only be absorbed by the crop, but also causes the body fluid of the crop to be extravasated, resulting in physiological drought. When the concentration of hormonal pesticides is too high, it may be counterproductive or deform the crop. Therefore, simply increasing the concentration of the drug solution is often counterproductive.
Misunderstanding 3, prevention and control once and for all insecticides, fungicides in the peak period of pests and diseases, although the prevention and treatment can achieve significant results, but with the loss of pesticides and decomposition failure, and infection of adjacent plots, there are still hidden dangers, should be separated 7 to 15 days, continuous administration of drugs several times, in order to achieve the best control effect. After foliar fertilizer and hormonal pesticides are sprayed, the plants can only be absorbed from the leaf surface in a small amount. It should be sprayed “small times†during the application period to achieve the desired effect.
Misunderstanding 4, pesticides lack of common sense The pesticide market has been opened, the quality of pesticide operators is uneven, often using farmers' lack of knowledge of pesticides, misleading farmers. Therefore, before using pesticides, it is best to consult with a qualified and qualified plant protection department to strive for the symptomatic use of pesticides. Pesticide is not purchased from operators with incomplete licenses, and pesticides that are expired or marked with suspiciousness are not used.