Laboratory No. 7
Laboratory No. 7
Laboratory No. 7
WEED CLASSIFICATIONS
Laboratory Activity No. 7
I. Introduction:
1. You are to collect twenty specimen of weeds for study. Number your
specimen.
2. Observe carefully the weeds.
3. Group together the weeds that have the same classification.
4. With the use of pamphlets or books of weeds, name the weeds that belong
to every classification. You can picture your classifications of weeds and submit on
line a week after.
5. Prove that your classification is correct by illustrating the different weed
morphology in the space provided for. Label the parts.
Fig. 1 Typical Grass Morphology
6. Now, use the sequence of numbering of your specimen. Again, with the
use of references, try to give the common names and scientific name of the weeds
under study. Be sure to write the scientific name correctly. Do this in tabular form.
2.
4.
5.
6.
7.
8.
10.
11.
12.
13.
14.
16.
17.
18.
19.
20.
Doveweed
Murdannia nudiflora
7. With the same weed specimen, classify the weeds based on the given criteria in
the next page. Use any resources that will lead you to the correct classifications.
Sp. Morphology Life Cycle Habitat Origin Cotyledon Mode of Growth
No. Reproduction Habit
1. Grass Perennial Upland/ Exotic/ Monocot Sexual/Asexual Creeping
Terrestrial Imported Reproduction
2. Grass Annual Upland/ Exotic/ Monocot Sexual/Asexual Tillering or
Terrestrial Imported Reproduction Branching
habit
3. Herb Annual Terrestrial Exotic Dicot Sexual Spreading
Reproduction
4. Grass Annual Terrestrial Exotic/ Mococot Sexual/Asexual Spreading
Imported Reproduction
5. Herb Annual Terrestrial Exotic/ Dicot Sexual Spreading
Imported Reproduction
6. Grass Annual Terrestrial Exotic Monocot Sexual/Asexual Bunch
Reproduction Type
7. Herb Annual Terrestrial Exotic Dicot Sexual/Asexual Erect or
Reproduction Spreading
8. Grass Short- Terrestrial Exotic/ Dicot Sexual/Asexual Erect or
lived Import Reproduction Spreading
perennial ed
or annual
9. Fern Perennial Terrestrial Exotic/ neither Sexual/Asexual Spreading
Imported monocots Reproduction
nor dicots
10. Herb Annual Terrestrial Exotic Dicot Sexual/Asexual Erect/
Reproduction Spreading
11. Grass Perennial Terrestrial Exotic/ Monocot Sexual/Asexual Rhizomatous
Imported Reproduction
12. Flower Annual/ Terrestrial Exotic/ Dicot Sexual/Asexual Creeping
Perennial Imported Reproduction
13. Grass Annual/ Terrestrial Exotic/ Dicot Sexual/Asexual Creeping
Perennial Imported Reproduction
14. Fern Perennial Terrestrial Exotic/ neither Sexual/Asexual Erect/
Imported monocots Reproduction Spreading
nor dicots
15. Herb low- Terrestrial Exotic/ Dicot Sexual/Asexual Spreading
growing Imported Reproduction and can
perennial even be
grown in
water
16. Grass short lived Terrestrial Exotic/ Dicot Sexual/Asexual Creeping
perennial Imported Reproduction
17. Flower Perennia/ Terrestrial Exotic Dicot Sexual/Asexual Spreading
Annual Reproduction
18. Grass Tropical Terrestrial Exotic/ Dicot Sexual/Asexual Erect/
Perennial Imported Reproduction Spreading
19. Herb Annual Terrestrial Exotic/ Dicot Sexual/Asexual Erect/
Imported Reproduction Spreading
20. Grass Annual Terrestrial Exotic/ Monocot Sexual/Asexual Erect/
Imported Reproduction Spreading
V. Questions:
2. Does the morphology or life cycle of the weed interfere with weed
management?
- Yes. They interfere because we need to know the weed's life cycle in
order to learn how to identify and understand weeds through controlling and
managing them. Furthermore, by determining their life cycle, we can
learn about their environmental influence, particularly in relation to
agricultural practices.