NCERT Book Class 7 EVS Knowing some plant diseases

1. Knowing some plant diseases 

Background

Flowers in the garden, crops in the field, vegetables in kitchen garden, fruits on the trees, etc., are damaged by disease causing organisms. This in many cases leads to loss in production which makes the lives of millions of families in our country miserable. It is thus important to know the organisms that cause the diseases and learn about its control measures.

Methodology

1. Visit a nearby crop field or an orchard or even a garden in the neighbourhood or look at potted plants in your house.

2. Observe the plants which are damaged due to disease. The damage may be the whole or part of a leaf, stem, flower or fruit of a plant. Examine each part of the plant carefully, particularly the leaves, especially their under surface.

3. Try to find out the name of the disease and the organism causing the disease. Take the help of your elders, farmers or caretaker depending upon the place of your visit. In many cases they may not be able to identify the name of the disease and the disease causing organism. You may then consult an agriculturist/horticulturist for reliable identification.

4. Prepare a table as shown below and write the information that you have collected

Conclusion 

Write a paragraph about disease causing organisms in plants that you have studied and present it in your class. Describe the diseased or damaged part of the plant. Draw/sketch or illustrate using appropriate means.

Follow-up

Find out the methods by which the diseases in plants can be controlled.

Please refer to attached file for NCERT Class 7 EVS Knowing some plant diseases