Exam 13: Pests and Pest Control

Farmers who regularly experience pests that cause catastrophic damage once infestation occurs,may benefit from insurance spraying,in which

You are tired of watching your crops die in the field from several pest species.You decide that next year you are going to use every type of ecological pest control you can find to address your problem.Over the winter you get ready,ordering pheromones that interfere with the reproduction of the pests,sterile male flies that will try to reproduce with some of the pest flies that you have,and wasps that lay their eggs in the larvae of another of your pests.It is expensive,but you think this should work well.Which of the following forms of control are you not using?

The Endocrine Disruptor Screening Program

Integrated pest management focuses on

Deciding to use a natural enemies approach to control the mites that infect her crops,a farmer purchases 10,000 ladybugs in the spring and spreads them over her 100 acre fields.This represents the use of natural

Control of bedbugs is difficult because their habitat is

Using a broad spectrum chemical pesticide would be counterproductive if you were relying on

Because it does not affect the crop yield or nutritional value,a local grower advertises that in his orchard he does not use

-In the processes of biomagnification and bioaccumulation described in the figure,

DDT was widely used,and remains in use today in some countries,to fight malaria by

In using control by natural enemies of pests,from the ecological perspective it is best to

In many freshwater toxicology studies,investigators rely upon knowledge of biomagnification to guide their investigations.If the researchers were looking for evidence of mercury contamination from a nearby power plant,they would most likely find the highest levels in the blood of

In a food chain consisting of toxic soil,toxic grasses,rabbits that eat the toxic grass,and hawks that eat the rabbits,the highest concentrations of toxins would occur in the

A foundation wishes to promote sustainable agriculture and organic farming.A consultant suggests that the foundation may want to give money to researchers investigating ecological control of pests.As the foundation reviews grant proposals,they should give the most money to researchers wanting to learn more about

DDT quickly became widely used because it

The levels of mercury are low in the fish eaten almost daily by people living near an ocean.For these people,bioaccumulation means that

The dangers of widespread DDT use are largely due to two main characteristics of DDT,its

In a food chain,biomagnification is the result of

Pesticide exposure has been shown to cause diseases of the

The pesticides that also function as endocrine disruptors cause disease by