Untitled Essay Research Paper As long as — страница 2

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nine at a temperature of up to 37 degrees Celsius. When hexazinone is sold as an herbicide warning labels are required to be placed on it.This labels are warnings that tell how to use and dispose of the product. The following pesticidedisposal statement must appear on hexazinone manufacturing-use products: “Do not discharge effluent containing this product into lakes, streams, ponds, estuaries,oceans, or public waters unless this product is specifically identified and addressed in an NPDESpermit. Do not discharge effluent containing this product to sewer systems without previouslynotifying the sewage treatment plant authority. For guidance, contact your State Water Board orRegional Office of the EPA.” In addition to the statement above more labels must appear. These

statements talk moreabout application and safety. The following must appear on end-use products:In the precautionary statements: “Corrosive, causes irreversible eye damage. Harmful if swallowed. Do not get in eyesor clothing. Mixers, loaders, and applicators must wear goggles, face shield, or safety glasses.Wash thoroughly with soap and water after handling. Remove contaminated clothing and wasbefore reuse.”Environmental hazard statement: “Do not apply directly to water or wetlands (swamp, bogs, marshes, and potholes). Donot contaminate water when disposing of equipment washwaters.”In the directions for use section: “Do not enter or allow entry into treated areas until sprays have dried to perform handtask. A person may enter the areas to perform other tasks only if the

person is wearing thepersonal protective eye equipment listed on the label.” These labels help to release the producer of the pesticide from any liabilities. They alsohelp to ensure that the pesticide is used properly to avoid pollution. No human deaths or hospitalizations have been reported that were associated withhexazinone since 1976. Only one accident with the herbicide has been reported. That was acase of accidental indigestion. These statistics are due mostly to good judgment by people usinghexazinone. Tests have been done on hexazinone to measure its oral, dermal, and inhalation toxicity.Most of these tests have been conducted on rats and rabbits. All these tests yielded high levelsof toxicity. It is placed in oral toxicity category III, dermal toxicity category IV,

inhalationtoxicity category III, and eye toxicity category I. Although it is harmful, it has been determinedthat hexazinone is not a mutagen in gene mutation. After being sprayed on crops, hexazinone begins to work. It is absorbed either throughthe roots or leaves depending on the type of formulation and method of application. Hexazinonethen translocates upward through the xylem. It then acts as a photosynthetic inhibitor killing theweed. Herbicides such as hexazinone are a great importance to the blueberry and other farmingindustries. We need to work to regulate the use of these products to ensure a clean environment.By studying these herbicides we can find better ways to use them. In the early 90’s peoplerealized that not as much Velpar was needed to kill the weeds as

previously thought. Newproducts are being develop at this very moment. The use of Velpar has allowed the farmers andgrowers to cut back on the amount of pesticides and insecticides used because the habitats formost of these bugs were in the weeds. DuPont recently came out with a fertilizer called Pronone.This comes in a pellet form and only has small amounts of Velpar in it. The Velpar will not leachinto the soil and contaminate wells but it will still kill weeds. Herbicides and pesticides whenused properly are a great asset to society.