Flashcards in Chapter 23 Deck (20):
any species that
-competes w us for food
-invades lawns and gardens
-destroys wood in houses
AKA: A NUISANCE
any predators, parasites, and disease organisms that control the population of about 98% of the potential pest species as part of the world's FREE ECOLOGICAL SERVICES
pesticides / biocides
chemicals to kill or control populations of organisms considered undesirable.
chemicals that kill insects by blocking reproduction, clogging their airways, or disrupting their nervous system.
Chemicals that kill weeds by disrupting their metabolism and growth.
chemicals that kill fungi.
chemicals that kill rats and mice.
second generation pesticides
chemicals that can kill or repel pests, and they have improved natural pesticides produced by plants.
-highly resistant -
a pesticide toxic to many species
selective spectrum agents
pesticide effective to only a narrowly defined group of organisms
how long a pollutant stays in the air, water, soil or the body
the more pesticides you use, the less effective they are
circle of poison
residues or banned or unapproved chemicals exported to other countries can return to the country.
rachel carson's book about the effects of the environment (mostly birds) with the use of pesticides.
a group of twelve persistent organic pollutants that countries are trying to ban.
examples: DDT, and other chlorine pertaining pesticides
the point at which economic losses caused by pest damage outweigh the cost of applying a pesticide.
increased pesticide use because most consumers often buy only the best looking crops even though there is nothing wrong with the blemished ones.
extends food shelf life and kills insects, parasitic worms and harmful bacteria
(low gamma radiation is used)