Tuesday, April 2, 2013

Pesticides

The Food and Agricultural Organization has defined pesticides as any(prenominal) substance or a mixture of substances intended for preventing, destroying or overtopling any pest, including vectors of human or animal disease, casteless species of animals causing harm during or otherwise interfering with the production, processing, storage, impart or marketing of food and agriculture. The lengthy and nebulous comment is not the dilemma; the real scope of the problem lies in the functionality of the product itself. Pesticides use in agriculture poses one of the greatest risks to our health and the environment. Pesticides atomic number 18 biocides designed to be toxic to particular(a) groups of organisms. They have passing diversified adverse on the environment, which sometimes have the façade of subtlety, but behind the schema, are extremely complex. Some pesticides are designed to kill target pests, others are for a broader spectrum, but both adversely affect global wildlife, soil, water systems, and humans.

The concept of pesticides is not new. It has been used by past civilizations to fumigate homes as described by Homer in 1000 B.C.E. and by 900 B.C.E. the Chinese were using arsenic to control garden pests.

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Since then, one of the major pest outbreaks occurred within new-fangled history was the white potato vine blight that destroyed most potato crops in Ireland during the mid-nineteenth century, but it wasnt until later in that century, pesticides such(prenominal) as arsenic, pyrethrum, lime sulfur, and mercuric chloride were used. Between this period and being war II, inorganic and biological substances such as slob sulfate, derris, and nicotine were used, but in low and controlled dosage. After World War II, the use of pesticides grew exponentially. Currently, there are more than 1,600 pesticides available and approximately 4.4 million tons used annually at a cost of more than $20 billion with the United States accounts for more than 25 percent of this market.
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