Action threshold the pest level at

which some type of

pest management action must be taken

2. Bioaccumulation The accumulation

of toxic substances,

such as pesticides, or

other organic chemicals in an organism

3. Biomagnification The tendency for

certain pesticides to

progressively become

more concentrated in

each type of organism

when moving from the

bottom to the top organism within a food

chain

4. Contact pesticide Pesticide that is not

absorbed systemically by treated plants

or animals.These pesticides must directly

touch the pest or a site

the pest frequents to

be effective

5. Economic threshold The level where

the economic losses

caused by pest damage, if the pest population continued to grow,

would be greater than

the cost of controlling

the pests