First, no high-toxic and high-residue pesticides are needed. High-efficiency, low-toxic, low-residue, environmentally-friendly pesticides and biological agents are preferred.
Second, carefully read the label before using the medicine, and do not use the pesticide without the label or the label is illegible, to prevent the misuse of the pesticide.
Third, pay attention to the maintenance of the equipment before using the medicine. First, clean the test sprayer with clean water to prevent leakage, and prevent the residual pesticide from harming the crops. Spraying herbicide sprayers should be used exclusively; pay attention to alternate use of drugs to prevent the development of resistance to pests and diseases; summer spray should be carried out before 10 am or after 5 pm.
The fourth is to pay attention to the spraying time and avoid the high temperature period as much as possible. When the drug is used at high temperature, people are easily poisoned, crops are prone to phytotoxicity, and the control effect is poor, and should be avoided as much as possible. Pay attention to the wind direction, do not spray on the wind, stop spraying when there is a cyclone.
The fifth is to pay attention to protection and reduce naked skin. Wear rubber gloves and anti-virus masks when dispensing. Use special equipment to measure. Wear long pants and pants, wear protective gloves such as hats, masks and gloves. Do not eat, drink or smoke during the application.
Sixth, rational dispensing of drugs to avoid blindly increasing the amount of drugs used and increasing the risk of crop damage. It should be prepared in strict accordance with the recommended dosage on the pesticide label; the dosage form of granules and wettable powder should be prepared by “second dilution methodâ€; the dosage and application frequency should not be increased arbitrarily, and the mixture should be appropriately reduced when mixed. the amount.
Seven is not to fatigue medication. The spraying amount should be large, and the concentrated spraying should be arranged reasonably for a long time. The fatigue should be cleaned and rested in time. Old, weak, women, and children have poor resistance, and it is not appropriate to participate in disease prevention and pest control.
Eighth, for the land that has just sprayed pesticides, it is necessary to set up obvious signs to prevent man-made mowing, grazing, digging wild vegetables and eating melons; strictly observe the safety interval regulations; pesticide waste packaging is strictly forbidden to use as it, not littering It is necessary to concentrate on deep burial.
Nine is to keep pesticides safe and avoid contact or misuse by the elderly and children.
Ten is to immediately send the doctor to the symptoms of poisoning and bring the label of the pesticide used. During the application process, pesticides splash into the eyes or on the skin, and rinse with plenty of water in time. Change the underwear in time after spraying, wash your face and exposed skin, remember not to use hot water. If symptoms such as headache, nausea, shortness of breath, vomiting, etc. occur during the spraying process, stop the operation immediately. If the poisoning is serious, immediately carry the pesticide package to the nearby hospital for treatment.
Solar cells use sunlight to generate electricity. As long as the sun shines on the battery, it will continue to generate electricity. It is a clean energy with the advantages of safety, reliability, no noise and no consumption of raw materials. It has the advantages of great convenience for residents in remote areas. So what is the working principle of solar energy? Today we'll explore it. Solar cell is a device that directly converts light into electric energy through photochemical effect. When sunlight shines on the semiconductor pn junction, a new hole (electron pair) is formed. Under the action of the electric field, the hole flows from the N region to the p region, and the electron flows from the p region to the N region. After the circuit is connected, a current is formed to convert light energy into electric energy.Solar panel, also known as solar cell module, is a kind of photoelectric semiconductor sheet that uses sunlight to directly generate electricity. It is an assembly composed of several solar cells assembled on a plate in a certain way. It is the core part of the solar power generation system.The earth, the green home for human survival.
With the development of human civilization, it has gradually become a victim of economic growth. Clean energy is imminent.
The sun concentrates 99.87 percent of the mass of the solar system, and one twenty-two percent of the energy radiates to the earth, becoming the main source of photosynthetic heat on the earth. Solar energy is one of the cleanest, most lasting and most magical energy of all.
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