A pesticide can be defined a "any substance or mixture of substances used to destroy, suppress or alter the life cycle of any pest." It is used to kill competing plants (herbicides) and control harmful insects (insecticides). Also, they can kill or suppress the growth of microorganisms, like bacteria, viruses, and fungi that live near crops (antimicrobial pesticides). The ultimate goal of controlling the growth of pests is to increase the crop yields. The compounds are made up of two main types of ingredients: active, which control pests, and inert, which improve performance of the pesticides. For example, some inert ingredients are responsible for increasing the shelf life while other inert ingredients act as solvents for the active ingredients. It is important to know that not all inert ingredients are safe. In fact, adding inert ingredients to pesticides requires permission from the
Environmental Protection Agency. Pesticide use has increased significantly since the 1960s, from 196 million pounds in 1960 to 516 million pounds in 2008. Most pesticides are used in agriculture (72 percent), but 13 percent are used in homes and gardens.
Glyphosate atrazine,
metam sodium, and
acetochlor are the most commonly used active ingredients in the US. The EPA estimated that between 180 and 185 million pounds of glyphosate were applied in 2007 while 28 and 33 million of pounds of acetochlor were applied in 2007. The act is important to protect migrant workers from the detrimental health effects associated with occupational hazards of working in agriculture. Migrant workers can be affected by pesticides depending on the toxicity, the intensity or the duration of their exposure. Workers may come into contact with chemicals via inhalation, ingestion, or skin contact. Short-term exposure risks include eye and skin irritation and skin sensitivity. More intermediate effects from repeated exposure include
neurotoxicity or nerve damage. Negative health effects are magnified and become increasingly serious after prolonged and repeated lifetime exposure, which include
cancer,
endocrine disruptions, and
reproductive complications Potential
genetic disorders and
developmental disorders can occur from fetal exposure during pregnancy. == References ==