Abstract
Pesticides are used to kill the pests and insects that attack on crops and harm them. Pesticides of various kinds have been used for crop protection for centuries. The crops get benefit from the pesticide; however, indiscriminate use of pesticides may lead to the destruction of ecosystem and biodiversity. This chapter intends to discuss about evolution of pesticides from use of sulfur to DNA insecticide that is paid to the perspective of creating preparations based on nucleic acids, in particular DNA insecticides. Also, classifications based on the mode of entry, pesticide function and the pest organism they kill, and the chemical composition of the pesticide is discussed here. Meanwhile, the global consumption of pesticide was also discussed. Moving toward the end, the chapter discusses acute and chronic effect of pesticide on the environment.
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