Topic 5: Classification of Insects as Pests

Question 1

CLASSIFICATION: FEEDING HABITS

Answer 1

1. chewing
2. sucking

Question 2

FEEDING HABIT: CHEWING

Answer 2

1. distinct mandible
2. hole or mines or bores on crops

Question 3

FEEDING HABIT: SUCKING

Answer 3

1. spotted discoloration
2. wilting and formation of galls on stems/leaves
3. virus vectors
4. e.g. aphids

Question 4

CLASSIFICATION: HOST PLANTS

Answer 4

1. polyphagous
2. monophagous
3. oligophagous

Question 5

HOST PLANT: POLYPHAGOUS

Answer 5

1. wide range of host

Question 6

HOST PLANT: MONOPHAGOUS

Answer 6

1. one specific host

Question 7

HOST PLANT: OLIGOPHAGOUS

Answer 7

1. certain group of host

Question 8

CLASSIFICATION: DAMAGED ON PLANT PARTS

Answer 8

1. leaf
2. shoot and stalk
3. flower and seed
4. fruit
5. root

Question 9

CLASSIFICATION: DEVELOPMENTAL STAGE

Answer 9

1. paurometabolous
2. holometabolous

Question 10

DEVELOPMENTAL STAGE: PAUROMETABOLOUS

Answer 10

1. destructive stage: both immature and adult

Question 11

DEVELOPMENTAL STAGE: HOLOMETABOLOUS

Answer 11

1. destructive stage: both immature and adult (coleoptera)
2. destructive stage: only immature (lepidoptera and diptera)