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Flashcards in Pests Deck (30):
1

what is a pest

damaging organism

2

name 6 ways to control weeds

1. life cycle
2. age
3. before flowering
4. biological
5. cultural
6. chemical

3

name 3 parts of insect

1. head 2. thorax 3. abdomen

4

name 5 elements adult insects all have

1. exoskeleton
2. three body regions
3. 3 pairs of legs attached to thorax
4. one pair of antennae
5. 0,1 or 2 pairs of wings

5

what are the pores that insects breath through called?

spiracles

6

what are 4 functions of exoskeleton

1. support
2. protection
3. shed
4. breathing

7

where do the legs and wings attach to?

thorax

8

what is wing adaptation elytra?

leather forewings of beetles

9

what is wing adaptation of hemelytra?

half membranous forewings of true bugs

10

what is wing adaptation of halteres?

reduced hind wings

11

what is wing adaptation of scaled wings?

ex butterfly

12

what is parthenogenesis ?

virgin birth of eggs without fertilization eg aphids

13

what is moulting?

shedding of exoskeleton

14

what is instar?

- growth stage between molts

15

what is metamorphosis?

series of changes that organism passes in its growth from egg to adult

16

what are 3 main types of metamorphosis ?

1. no metamorphosis egg --> young--> adult
2. simple or incomplete egg --> nymphs -->adult
3. complete egg-->larvae-->pupa -->adult

17

what are characteristics in incomplete metamorphosis?

- nymph similar to adult but no wings or reproductive organs
- moult 3-5 times before adulthood
-eg grasshoppers, cockroaches, ect

18

what is the name for a water nymph

naiad

19

for bugs that undergo complete metamorphosis, what is the most destructive stag?

larvae ex catepillar

20

what are 2 classes for classification by feeding habit

1. chewing
2. sucking and piercing

21

what is a disease

process causing a disturbance in a plants normal growth and development

22

name 4 symptoms of disease

-wilting, chlorosis, necrosis, stunting

23

name 4 signs of disease

see structure of pathogen ex fungal spores, fruiting bodies ect

24

what is a saprophytic fungus?

-feeds on dead organic matter
-usually beneficial

25

what is a parasitic fungus?

-feeds on living organisms
-usually pathogenic

26

what are spores?

- reproductive units moved by wind
-resistant to chemical controls

27

what are hyphae

-fine strands of fungus

28

a) what are bacteria? b) how do they enter an organism? c) how are the spread?

a) single celled organism
b) natural opening (stomata)
c) wind, rain, animals, contaminated tools

29

where do viruses reproduce?

only in living things

30

t or f pesticides are available to control viral infection in plants

f; can only use to control vector