Uploaded by Tinay Villania

SHSTypesOfWeeds (Demo)

A Detailed Lesson Plan in Agriculture and Fishery Arts
Grade 11
Subject Matter
Types of Weeds
At the end of the class, the students will be able to: a.
Identify the different types of weeds.
b. Appreciate the importance of weeds in relation to crop production and
human life.
c. Present a creative presentation about the different types of weeds.
Discussion and Direct Instruction
Instructional Materials
Weed Sample, Video Clip about weeding, Laptop, Projector and Speaker.
Teacher’s Activity
Student’s Activity
A. Preparatory Activity
Good Morning Class!
Anyone who will lead the prayer?
Okay John you may lead the prayer.
Who is absent today?
I guess you are excited about our
topic for today but before we go on,
let us have a short review first about
what we have tackled yesterday.
Good Morning Sir!
“Let us pray…In the name of the father and
the son and the holy spirit…Amen!
No one is absent sir!
(Student’s trying to recall)
Can anybody give a brief recall of our
lesson yesterday?
(One student raises his hand) We
discussed about crop protection sir.
Very Good! We have discussed about
the crop protection which is the
science and practice of managing
plant diseases, weeds and other
pests that damage agricultural crops
and forestry.
(Students attentively listen.)
B. Lesson Proper
1. Motivation
Okay class I will show you a video
clip and I want you to observe
what the video is all about.
Are you ready?
Okay let’s start.
(Students are excited to watch the video.)
Yes Sir!
So! What is your idea about the
video clip being presented?
Yes, Mr.
(Student raises hand.)
It’s all about weed control sir.
2. Presentation
This morning we will be tackling
about the Types of weeds. Before
we go on, what comes up on
your mind if you heard about the
word weeds?
Yes, Mr.
(Student actively raises their hand.)
It grows anywhere.
Yes, That’s true.
3. Discussion
So, What is weeds?
Yes, that’s correct.
A plant that can be seen everywhere
especially in upland and lowland area.
What else?
Yes it’s true.
Okay class, weeds is a plant that
interfere with human activity, a
plant growing out of place, a
plant growing in an area where it
is not desired, plant that is
useless, unwanted, undesired.
Plants that contain medicinal property.
(Students attentively listen.)
So imagine class, this weeds grow
anywhere. Does the weeds really
important when it comes to crop
Maybe Sir!
In what particular way?
No idea Sir!
Okay let’s find out!
When we talk about importance
of weeds, it comes up with two
effects: the Harmful effect of
weeds and Some beneficial
effects of weeds.
(Students attentively listen.)
So what are those harmful effects
of weeds?
(Student raises their hand.)
Yes, Miss.
Okay that’s correct.
Act as a competition for space and nutrients
that crops need to grow.
What else? I would like to hear
from others.
Yes, Mister.
(Other student raise their hand.)
They act as alternate hosts for pests and
Absolutely you got the point.
Anyway, here is the list of the
harmful effects of weeds: They
reduce the quantity and quality,
They serve as alternate hosts for
other pests/increased costs for
insect and disease control, They
increase the costs of production,
They clog waterways and
irrigation canals, Thy
exude/release chemicals that are
harmful to other plants, They
reduce the value of the land.
(Students listen carefully.)
(Students listen Carefully.)
So those are the harmful effects
of weeds.
Let’s move on to beneficial
effects of weeds.
(Students attentively listen.)
What are those beneficial effects?
Yes, Miss.
Yes! That’s right.
(Student raises their hand.)
Alternative source of food, sir!
What else?
Yes, Mister.
(Other student raises their hand.)
Yes it’s true.
It can be use as alternative medicine.
As what you’ve mention earlier
class, here’s the list of some
beneficial effects of weeds: They
reduce soil erosion in hilly areas,
Some can be sources of food for
man and animals, They prevent
leaching of nutrients and return
them into the soil, They could be
sources of germplasms for crop
improvement, Some can be
sources of bio pesticides, They
can be important source of useful
What are those weeds that
contain medicinal property?
(Student listen carefully.)
(Student raises their hand.)
Can you give me some example of
this weeds?
Yes, Miss.
Tawa-tawa , Sir!
And last but not the list, They
provide habitat for insect
(Students attentively listen.)
So! Those are the importance of
weeds in relation to crop
production and human life.
And what do you called about the
removal of this unwanted plants
from an area?
(Student raises their hand.)
Yes, Mister.
Weeding, Sir!
Yes, that’s correct.
Weeding is an important control
method practiced in many crops.
The removal of weeds is useful
because these unwanted plants
compete with the crops for
space, water and nutrients.
(Student listen carefully.)
And the most important thing is
we also need to familiarize and
identify thoseweeds.
Why we need to identify those
(Student raises their hand.)
Yes, Miss.
We need to identify those weeds because it
will give some possible effect especially in
crop production.
Okay! Give me some example of
Carabao Grass, Sir!
What else?
Yes, Mister.
Based on gross morphology,
there are three types of weeds.
What are they?
(Other student raises their hand.)
Cogon, Sir
Any idea?
No Idea sir.
This types of weeds are the
grasses, sedges and broadleaves.
Okay, let’s start with the Grasses.
Grasses is a member of family
gramineae, stem which are
rounded have distinct nodes and
internodes, leaves (composed of
the leaf blade) arise alternately in
two rows from the nodes, thin
and narrow and have a parallel
venation, roots are fibrous,
example are Rottboellia
cochinchinensis (Itchgrass),
Imperata cylindrica (Cogon grass),
Eleusine indica (Indian goose
grass) , Echinochloe crusgalli
(Barnyard grass).
(Students attentively listen.)
What else?
(Student raises their hand.)
Yes, Miss.
Bermuda, sir!
You’re right! So, those are the
example of weeds. Next is the
Sedges is a member of family
Cyperaceae; closely resembles
grasses; stems are thin and
angular/triangular; leaves are in
thin narrow and have parallel
venation, with leaf sheaths that
are fused to form a tube around
the stem; roots are fibrous;
perennial sedges have
underground tubers e.g. Cyperus
rotundus (Purple nutsedge);
examples are Cyperus iria (Rice
Flatsedge), Cyperus kyllingia ,
Fimbristylis littoralis ( Lesser
fimbristylis), Scirpus maritimus
(Saltmarsh bulrush), etc.
(Students listen carefully.)
What else? Can you give some
examples on sedges?
Yes, Miss.
Okay let’s move on with the last
one which is the broadleaves.
Broadleaves is a plants not
belonging to neither grasses not
sedges; leaves are fully expanded
and broad; some are monocots
but mostly are dicots and have
netted leaf veins; examples are
Ageratum conyzoides (Billy Goat
(Student raises their hand.)
weed) , Monochoria vaginalis
(Pickerel weed), Ipomoea aquatic
(Students attentively listen.)
(Swamp morning-glory), Ipomoea
triloba (Three-lobe morning glory),
What else? Give me some
example of broadleaves.
Yes, Miss.
(Student raises their hand.)
Kanding-kanding, sir!
Those are the types of weeds that
we need to familiarize and
In your own idea, why we need to
familiarize those weeds?
Yes, Mister.
(Student raises their hand.)
It is important to learn the weeds because it
plays vital role in crop production and to
human life as well.
Yes, exactly!
4. Generalization
We are almost done with the
lesson for today, but before
proceeding to our next activity let
us wrap up first what you have
Knowing all the types of weeds
and its importance, how
significant do you think is the
weeds in crop production and in
human life?
(Student raises their hand.)
Yes, Miss.
Despite the negative impacts of weeds,
some plants usually thought of as weeds
may actually provide some benefits such as
soil stabilization, habitat and feed for
wildlife, human consumption and provide
employment opportunities.
You nailed it to the point. What
else? Can I hear from the others?
(Other student raises their hand.)
Yes, Mister.
Weeds have certain effects in agriculture,
which are mostly in the form of different
harmful results but somehow there are also
some beneficial effects.
Absolutely! In addition to that,
weeds have a controversial
nature. But to the agriculturist,
they are plants that need to be
controlled, in an economical and
practical way, in order to produce
food, feed and fiber for humans
and animals. In this context, the
negative impacts of weeds
indirectly affect all living beings.
5. Application
The class will be divided into 4
groups. Each group will Create a
compilation of the different types
of weeds. Give at least five sample
of weeds in each type and indicate
its common name. Be creative
because you will present the
output to other group.
Direction: Identify/Enumerate the following statements being given. Write your
answers in a ¼ sheet of paper.
What do you called about a plant that is unwanted?
Give at least three harmful effects of weeds.
Give at least three beneficial effects of weeds.
What are the three types of weeds?
Make a Research about all the Methods of Weed Control and Write it on a one
whole sheet of paper.