LESSON PLAN

1. TEACHING MANUAL
NAME OF THE TEACHER: ANJANA VIDYADHARAN STANDARD:VIII
NAME OF THE SCHOOL : STRENGTH:
SUBJECT: BIOLOGY DURATION:45 MINUTE
UNIT: AGRICULTURE:A WAY OF LIFE
LESSON:DISEASES THAT REDUCE THE YIELD IN AGRICULTURE
CLASS ROOM INTERACTION PROCEDURE
STUDENTS
EXPECTED OR
ACTUAL
RESPONSE
INTRODUCTION
Teacher make rapport with the students by asking questions
related to contextual situation.
Do you know why we use hybrid varieties in agricultur?
Are you interested in agriculture?Did you ever observe
plants in your localty?
Did you notice any infected plants among them.How could
Pupil interacts
with the teacher.
For better yield
Yes

2. you identify the infected one from the normal plants?
Can anyone tell what is the reason for infection.
So, today we are going to discuss various diseases and their
symptoms and how it results agriculture uneconomical.
PRESENTATION
ACTIVITY I
Teacher shows some newspaper collage and ask the students
tolist down various diseases that cause agriculture
unprofitable.
Diseases , Bacteria ,fungus , C.B
Virus…
Teacher ask one of the student to present their notes in the
classroom
DISCUSSION POINTS/CONSOLIDATION
 Cattle-Foot and Mouth Diseases
-Anthrax
 Pepper-Quilt Wilt
 Arecanut-Mahali
 Coconut-Coconut Mite
 Rubber –Pink Disease
 Poultry-Avian Flu
Yes,infected one
are defected in
shape,colour etc
Pupil will not
able to explain
it.
Pupil interacts
with the teacher
and discuss the
points .
Pupil present
their notes

3. ACTIVITY II
Teacher ask questions to the general class and ask the
students to find out the answers through group discussion.
1.Name the microorganisms that cause diseases?
2.Which are the diseases likely to be spread from domestic
animals to man?
Bacteria , fungus…. C.B
Avian flu, Swine flu…
DISCUSSION POINTS/CONSOLIDATION
 Bacteria , virus ,fungus etc are the disease causing
microorganism.
 Anthrax ,Avian Flu, Swine Flu etc are the disease likely
to be spread from domestic animals to man.
ACTIVITY III
Teacher displays some original materials and slides of
infected plants like plantain, arecanut, paddy, pepper,
sugarcane….and ask the students to identify the symptoms
through group discussion.
Plantain –Bunchy Top Disease
Arecanut-Mahali Yellowing…. C.B
Pupil interacts
with the teacher
and in groups
and record the
answers in
science diary.
Pupil observe
the materials
and find out the
symptoms.

4. DISCUSSION POINTS/CONSOLIDATION
CROPS
SYMPTOMS
DISEASES
PLANTAIN
Leaves become shortened,
appear crowded on the
top, growth reduced.
Bunchy Top
Disease
ARECANUT
Leaves become yellowish
and gradually dry up
.Fruits shrive and fall off
,the apex of stem weakens
Mahali
Yellowing
PADDY
Spot appear, leaves dry tip
towards base, brown spot
on leaves ,paddy shrinken .
Blight Disease
Spot Disease
SUGARCANE
Stem gets shrunk and
splits.From the split region
a reddish fluid flows,
leaves wilt.
Red Stripe
Disease
REVIEW
1 .Which are the diseases spread from animals to man?
2 .What are the major groups of microorganism?
3.What is meant by pathogenic bacteria?
Pupil answers

5. CHALKBOARD SUMMARY
BIOLOGY Std:
Str:
Diseases ---makes agriculture uneconomical
Microorganism ---Bacteria,Fungi,Virus….
Pepper----Quick Wilt
Arecanut---Mahali
Rubber----Pink Disease….
FOLLOW UP ACTIVITY
Through interact with the farmers in your locality and from
other resources collect more diseases that affect the yield in
agriculture.