GENERAL CONTROL OF WEEDS

Subject:

Agricultural Science

Class:

SS 2

Term:

THIRD Term / 3RD Term

Week:

Week 2

Topic:

GENERAL CONTROL OF WEEDS

Previous Knowledge: The pupils have previous knowledge of

   COMMON WEEDS FOUND IN FARMS

that was taught in their previous lesson.

Behavioural  Objectives : At the end of the lesson, learners will be able to

• Say the meaning of Weeds
• Mention the effects of weeds on crops and the Economy
• Write out the various types of weeds and their botanical names
• Mention different methods of weed control

Instructional Materials 

• Wall charts
• Online Resource
• Textbooks
• Laptop
• Crop samples
• Pictures that are related to the subject matter
• Flash cards
• www.edudelighttutors.com

Methods of Teaching 

• Role modelling
• Questions and Answers
• Explanation
• Discussion
• Recitation
• Imitation
• Story Telling
• Dramatization

WEEK TWO 

TOPIC: GENERAL CONTROL OF WEEDS

CONTENT

GENERAL CONTROL OF WEEDS

1. Mechanical control: involves the use of machines such as bulldozer, tree puller, plough etc to get rid of unwanted plants.
2. Physical or manual control: This can be done in different ways which includes hand pulling, hoeing, slashing with cutlass etc. 
3. Biological Control: This involves the introduction of some insects and herbivorous animals to farmland to eat up the leaves of the weed and even the entire plant in some cases.
4. Cultural control: This involves the use of farming system to get rid of wed. It can be achieved by practice of crop rotation and the growing of cover crops to suppress the growth of the weeds on the farm. Other types of cultural weed control methods are: flooding, bush burning, mulching
5. Chemical Control: This involves the use of chemical solution called herbicides to control weeds. Some herbicides are selective while some are non-selective or contact herbicide

REASONS WHY WEEDS ARE DIFFICULT TO CONTROL

1. They have vigorous growth, they are aggressive and persistent
2. Weeds have high reproductive capacity
3. Their seeds have long period of viability
4. Weeds have efficient dispersal method
5. They have efficient means of propagation 
6. They have long period of dormancy
7. They produce many seeds
8. They have short life cycle

COMMON WEEDS FOUND ON FARMS

Presentation : 

The topic is presented step by step

Step 1: The class teacher revises the old topic

Step 2: The class teacher introduces the new topic

Step 3: The class teacher allows the pupils to give their own contributions and gives room for pupils” participation

Class Teacher and Pupils Activities. Interaction or Participation 

This involves class teacher and pupils’ interaction, conversation, imitation or modeling through discussion, play method or just by recitation or asking and answering questions that are related to the topic that has just been taught.

EVALUATION 

1. What are weeds?
2. List five beneficial effects of weeds
3. List and explain different weed dispersal method
4. List five weeds and their botanical names
5. a. What are weeds?
6. b. Discuss the methods of weed dispersal
7. List five economic importance of weeds
8. List five common weeds and state their botanical names
9. Discuss the four methods of weed control
10. Give three reasons why weeds are difficult to eradicate

Conclusion : 

The class teacher concludes the lesson by giving the pupils some notes on the topic that has just been taught. He goes round to mark and he does the necessary corrections.