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SAFE USE OF PESTICIDES
Poisons are substances which when they enter an organism in different ways (through the integument, respiratory tract, alimentary tract) in insignificant amounts are capable of causing malfunctioning of its vital activity which in definite conditions results in unhealthy state, i.e. produce a toxic effect which is called as poisoning. The concept "poison" implies interaction between a living organism and a substance. A poison is always a chemical substance, either synthetic or natural.
The effects of poison on living organism are of two types viz., acute poisoning and chronic poisoning. Acute poisoning of an organism by a poison occurs when the poison chemicals acts once. It manifests itself in up setting of the vital activity of the organism with a possible lethal outcome. Chronic poisoning of an organism is the result of the repeated action of relatively small amounts of a poison manifests itself in slowly developing malfunctioning of normal vital activity.