... areas are affected and heavy damage results in a short period of time. It is therefore important to control unwanted organisms that cause disease in order to obtain a good harvest. This is why the use of pesticides is extremely important in farming but also dangerous as observed below. By their very nature, most pesticides create some risk or harm to humans, animals or the environment because they are designed to kill or otherwise adversely affect living organisms. At the same time, pesticides are useful to society because of their ability to kill potential disease causing organisms and control insects, weeds and other pests. www.epa.gov.html (office of pesticide programs) Pesticides may be divided into 3 categories. Insecticides, which are used to combat insect pests. Fungicides, which target the fungi that cause many plant diseases. And finally, herbicides which are used to kill weeds. Each type of pesticide can work in 3 ...

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