Chapter 6 Flashcards
Pesticide Poisoning
When a pesticide makes you ill or has an adverse effect on some bodily system
EX: A persons nervous system being disrupted by an insecticide
Pesticide Injury
Occurs when a pesticide directly damages tissue
EX: a burning sensation caused by pesticide splash
Allergic effects to Pesticides
Not due to nature of pesticide, and only some people experience them
Contact Effects
appear where pesticide exposure occurred on the body
ex: skin irritation, eye irritation, respiratory damage
Systemic Effects
arise at sites other than where the pesticide entered the body
ex: nausea, vomiting, sweating, body aches
Acute Effects
occur within 24 hours after an acute exposure to pesticides
Delayed Effects
appear a day or more after either acute or chronic exposure
Chronic Effects
delayed effects that appear after chronic exposure
ex: cancer, genetic mutation, blood disorders, respiratory disorders
Reversible Effects
not permanent and go away in time. They can be changed or remedied
Irreversible Effects
Permanent and cannot be changed once they are occurred
Acute Toxicity
pesticides ability to cause harm within 24 hours after a single exposure
Chronic Toxicity
the ability to cause harm after repeated exposure to small doses over time
What is LD50 and LC50
LD50 is the common method used for comparing acute toxicity. The lethal dose of a toxicant required to kill 50% of the population of test animals
LC50 is the concentration of a substance in air or water required to kill 50% of the test population. frequently expressed in parts per million
What is the relationship between toxicity and LD50 and/or LC50
They indicate how much pesticide it takes to cause harm. Lower values mean greater toxicity because it takes less pesticide to cause harm
How are pesticides assigned to toxicity categories
It is based on the LD50 LC50 and tests for corrosiveness and irritation to skin and eyes
