Module 5 Cockroaches

Question 1

Cockroach morphology

Answer 1

• leather wing
• chewing mouthparts
• large pronotum
• prominent cerci
• dorso-ventrally flattened

Question 2

development

Answer 2

• hemimetabolous (nymphs and adults in same habitat)

- oviparous: lays ootheca

Question 3

feral

Answer 3

independent of humans
95% of all species
no medical importance

Question 4

peridomestic

Answer 4

survive in and around humans

e.g. American and Oriental

Question 5

domestic

Answer 5

live mostly indoors, completely dependent of humans
most important medically
e.g. Brownbanded and German

Question 6

oriental cockroach characteristics

Answer 6

black, medium sized
ootheca with 16 eggs
peridomestic
"water bug" - associated with damp environments
restricted mobility

Question 7

oriental cockroach sexual dimorphism

Answer 7

males - winged but don’t fly

females - brachypterous (short winged)

Question 8

oriental cockroach taxonomy

Answer 8

Blatta orientalis

Question 9

american cockroach taxonomy

Answer 9

Periplanta americana

Question 10

american cockroach characteristics

Answer 10

large, red/brown
long wings and capable of flight
ootheca with 12 eggs
most found peridomestic species
can move thru sewer system

Question 11

german cockroach taxonomy

Answer 11

Blattella germanica

Question 12

german cockroach characteristics

Answer 12

most important domestic pest
found in unclean areas
small, brownish with 2 black lines on pronotum
major nuisance and implications for health
ootheca with 30 eggs
don’t fly, only glide
found mainly in kitchens and pantries

Question 13

high populations can affect human health:

Answer 13

1. contamination of food
2. spread of pathogens thru mechanical transmission
3. allergies

Question 14

prevention to minimize entry into buildings

Answer 14

1. can enter thru infested containers
2. deny enter and shelter (i.e. fix holes)
3. basic sanitation

Question 15

Integrated Pest Management (IPM) strategies

Answer 15

1. insecticides (multiple sprayings)
2. boric acid powder (poison is ingested by cockroach killing it, then is fed on by others killing them too)
3. roach baits (visit then go back home to die)
4. diatomaceous earth (scratches cuticle then insect dries out) (non-toxic to humans)
5. sticky traps