Organo -phosphorus compounds have been imported to India since 1952 but we got awareness of the nature of these compounds when the Kerala food poisoning tragedy occurred in 1958. Organophosphorus compounds with effective control and eradication of the pets and insects affecting the plants and crops became a boon to agriculturist and horticulturists and they revolutionized agriculture and horticulture. In our country where agriculture is the main occupation of majority of the people in rural area, the organo-phosphorous pesticides have contributed their own share in bringing the green revolution The agriculturists who use these pesticides, commonly do not follow all the precautions during spraying and become victims of the accidental acute poisoning and sometimes of chronic poisoning. Population is also at risk of chronic poisoning from those agents by ingestion of vegetables etc which contain significant amount of these compounds when they are brought to the market. The number of people who consume these pesticides for suicidal purpose is in increasingly rapidly. Aim and Objects: To study the clinical features of the organo-phosphorus poisoning in patients coming to emergency ward.