1. A persistent virus will eventually lose its abilty to cause
2. Allergens from fleas and cockroaches in a home or office may
3. Systemic insecticides are translocated through the vascular
system of a plant or the circulatory system of an animal.
4. Antibiosis is characterized by a plant's ability to outgrow
and/or repair damage resulting from an insect attack.
5. At the economic threshold, the cost of damage equals the cost
6. Window screens and electronic "bug zappers" are two examples
of cultural pest control.
7. Environmental persistence is regarded as a major disadvantage
of the synthetic pyrethroids.
8. Which of these is an "unbiased" sampling strategy?
A. Malaise trap C. Light trap
B. Sticky trap D. None of these
9. Breeding nursey stock for higher levels of secondary plant
compounds would be an example of:
A. Antixenosis C. Xenobiosis
B. Antibiosis D. Tolerance
10. Which of these is likely to be regarded as the most "useful"
biological control agent?
A. A beetle that feeds on kudzu.
B. A parasite of lady beetles.
C. A predator of robber flies.
D. A viral pathogen of lacewings.
11. To which of these groups do insect pathogens belong?
A. Viruses and bacteria C. Protozoa and fungi
B. Bacteria and protozoa D. All of these
12. Pest outbreaks tend to occur when:
A. Crops are planted in monoculture.
B. Natural enemies are imported from abroad.
C. Farmers switch to new crops.
D. All of these.
13. Biological control is likely to be MOST effective when the
predator or parasite has a(n):
A. Long life cycle
B. Wide range of preferred hosts
C. High reproductive rate
D. All of these
14. Which insect orders contain species that are important pests
of domestic animals?
A. Siphonaptera and Mecoptera
B. Orthoptera and Hemiptera
C. Diptera and Psocodea
D. All of these
15. Which control strategy is likely to have the greatest impact
on non-target organisms?
A. Chemical control C. Cultural control
B. Biological control D. Physical/mechanical control