Sometimes it is measured as LC50 meaning the lethal dosage in the air for 50 percent of the animals tested. The lower the LD50 or the LC50, the more poisonous the pesticide. Chronic poisoning affects an animal or human over a long period of time after small, repeated doses. There is no widely recognized measure of chronic toxicity. Some areas of the body are more susceptible than others.
Oral toxicity refers to poison that is ingested.
Pesticides on hands can be ingested while eating, drinking or smoking. Inhalation refers to poisons breathed through your nose. Breathing the vapor of the pesticide can cause harm. A pesticide is a chemical or other agent that will destroy a pest or protect something from a pest. For example, a fumigant is a poisonous gas that kills when absorbed or inhaled.