IDENTIFICATION AND CLASSIFICATION OF WEEDS

Question 1

IDENTIFICATION OF WEEDS

Answer 1

1. scientific name
2. local name
3. english common name

Question 2

SCIENTIFIC NAME

Answer 2

1. based on taxonomic and systematic rules
2. universal

Question 3

LOCAL NAME

Answer 3

1. given by locals
2. names are regional and varies

Question 4

ENGLISH COMMON NAME

Answer 4

1. given within a particular country or region
2. more universal than local name

Question 5

CLASSIFICATION

Answer 5

1. grouping of weeds based on certain category

Question 6

CLASSIFICATION OF WEEDS

Answer 6

1. life cycle
2. morphology
3. number of cotyledons
4. habitat

Question 7

CLASSIFICATION BASED ON LIFE CYCLE

Answer 7

1. annual
2. perennial (simple; creeping)

Question 8

ANNUAL WEEDS

Answer 8

1. complete life cycle within one growing season
2. prolific seeders and grows fast
3. shallow rooted
4. have differential dormancy
5. susceptible to herbicide application

Question 9

PERENNIAL WEEDS

Answer 9

1. complete life cycle in more than one growing season
2. longer vegetative phase
3. reproduce either through seeds or vegetative propagules

Question 10

SIMPLE PERENNIAL

Answer 10

1. rely solely on ability to produce seeds

Question 11

CREEPING PERENNIAL

Answer 11

1. capable of reproducing both through seeds and vegetative propagules
2. main mode of reproduction is vegetative propagules
3. seeds are not readily germinated

Question 12

CLASSIFICATION BASED ON MORPHOLOGY

Answer 12

1. grass
2. sedge
3. broadleaf

Question 13

GRASS

Answer 13

1. narrow leaf blade
2. round and hollow stem
3. presence of ligule
4. alternate leaf arrangement
5. leaves originate from nodes

Question 14

SEDGE

Answer 14

1. narrow leaf blade
2. triangular and solid stem/culm
3. whirled leaf arrangement
4. leaves originate from base

Question 15

BROADLEAF

Answer 15

1. broad leaves

Question 16

CLASSIFICATION BASED ON COTYLEDONS

Answer 16

1. monocots
2. dicots

Question 17

MONOCOTS

Answer 17

1. single seed leaf
2. fibrous root system
3. parallel leaf venation
4. grasses and sedge

Question 18

DICOTS

Answer 18

1. possess two seed leaves
2. taproot system
3. netted leaf venation
4. broadleaf

Question 19

CLASSIFICATION BASED ON HABITAT

Answer 19

1. terrestrial
2. aquatic (floating; emerged; submerged)

Question 20

TERRESTRIAL ENVIRONMENT

Answer 20

1. presence of land features
2. well-drained environment
3. ‘upland/dryland’

Question 21

AQUATIC ENVIRONMENT

Answer 21

1. presence of standing water
2. grouped as floating, emerged or submerged

Question 22

FLOATING WEEDS

Answer 22

1. grow on water surface
2. roots not attached to soil bottom
3. readily carried by water currents

Question 23

EMERGED WEEDS

Answer 23

1. stem, leaves and flowers are above the surface
2. roots attached to soil
3. firmly rooted to the ground, but with standing water

Question 24

SUBMERGED WEEDS

Answer 24

1. grow under water
2. floral parts may shoot up

Question 25

OTHER CLASSIFICATIONS OF WEEDS

Answer 25

1. common weeds
2. noxious weeds
3. invasive weeds

Question 26

COMMON WEEDS

Answer 26

1. commonly found in farms
2. readily controlled
3. routine type of weeds

Question 27

NOXIOUS WEEDS

Answer 27

1. ability to persist continuously despite control efforts
2. some form of regulation needs to be instituted

Question 28

INVASIVE WEEDS

Answer 28

1. present potential problems once introduced
2. cause great damage to environment
3. great adaptability
4. potential to replace native vegetation