Pesticides on the market now, is that people often use paraquat herbicide products, but it has a role on herbicide absorption of and contact herbicides and other species. When the agents contact with weeds, just kill some contact with the agent, played the role of local destruction, plants can not be conducted. Paraquat is known as Gramoxone, is tag-type herbicide, with fast-acting and non-selectivity, after spraying onto the weeds, green part of the ground as long as exposure to drugs, there will wilt symptoms a few hours later, a -2 days will all be dead, good herbicide effect, but also very fast. This product is linked pyridine, Destuctive tag type herbicides, with quick and rain erosion resistance and other characteristics, can kill most of the grass and broadleaf weeds, leafy liquid contact for several hours after the beginning of the dead. Half an hour after spraying rain, efficacy is not affected. Liquid sprayed onto mature or brown bark, does not affect the plant roots, after the liquid is completely passive contact with the soil, does not affect the plant roots or when the crop after crop emergence and growth. Note 1, the strict implementation of the relevant provisions of pesticide management, implementation of the production and sale of the franchise licensing system to avoid spreading and free to buy pesticides. 2, to carry out the safe use of pesticides education, improve anti-virus capabilities. 3, improve the production process and spraying equipment, to prevent run, run, drip, leak. 4, to comply with safety rules, such as standing on the wind back row spraying, wear long trousers, wearing protective glasses, plastic film aprons, once contaminated skin should be cleaned. 5, strict management, to avoid wastage of drugs, individuals do not keep drugs: Add warning color in the liquid, odor agents or emetic agents to prevent ingestion.