Exam 13: Pests and Pest Control

The current crisis in controlling bedbugs has encountered difficulties because

The common definition of pest

The Delaney clause of the FFDCA became increasingly problematic because

Insecticides would be most useful in combating

A gardener applied heavy doses of the same insecticide to her garden for two consecutive years to kill squash bugs.During the third year,although the squash bugs were reduced,the woman called in an expert to explain why she had an abundance of new pests that were destroying her garden.The expert explained that the abundant new pests were largely due to her previous use of an insecticide in a phenomenon known as

a) b) -Two insect food chains are illustrated in this figure.If a persistent insecticide were applied to the plants in these systems,where would we expect to find the high concentrations due to biomagnification?

According to recent EPA studies,70% of pesticide poisonings in humans come from

Most organisms accumulate synthetic organic chemicals in their bodies because these chemicals

Biopesticides

Bt crops

The highest amounts of pesticides or their breakdown products would be found in a cougar in its

The cassava is an important food crop for people living in sub-Saharan Africa.In the 1970s,mealybug infestations destroyed harvests and people starved.A researcher who studied the mealybug in its native environment discovered a parasitoid wasp that was a natural predator.After extensive testing to determine safety,the parasitoid wasp was introduced into the sub-Saharan region with tremendous effect controlling the mealybug throughout most of Africa.This approach represented a form of

A man discovers that he has a fungus attacking the roots of flowers in his garden.If he uses a broad-spectrum fungicide to kill the pests,he may risk

APHIS oversees both

Farmers in the Midwestern United States routinely rotate between soybean and corn crops.Sometimes it is said that they do this because the soybeans introduce nitrogen into the soil.Although this is true,farmers also rotate their corn and soybean crops as a form of

-The bird in this figure is a fish-eating osprey with its chicks.What commonly used pesticide nearly caused the extinction of this and other large predatory bird species in the 1970s?

Which one of the following is classified as a reduced-risk pesticide?

Analysis of bedbug control options has revealed that

Struggling with various pests attacking the garden every year,a neighbor suggests that next year they might plant a row of marigold flowers completely around the outside edge of the garden.Sure enough,the next year they did this and had fewer pests and better crops.This strategy represents

The primary job of APHIS is to