Question

Discuss the various methods which are used to control plant diseases.

Answer

Methods to control plant diseases:

  1. Seed treatment with Thiram 2.5g/ kg to prevent blast of rice.
  2. Spraying Bavistin at 10 days interval to prevent wheat rust.
  3. Spraying Dithane M45 at 2g/ l water at 10 days interval to prevent wheat rust.
  4. Avoid water logging for fungus diseases.
  5. Growing sorghum and pigeon pea mixed cropping to avoid stem rot.
  6. Spraying the crop with 0.2% Ziram and Maneb.

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Double Matching:

Match the columns I, II and III.

 
Column I
 
Column II
 
Column III
1.
Oil seeds
a.
Red Sindhi
i.
Sahiwal
2.
Intercropping
b.
Mustard
ii.
Sunflower
3.
Local breeds
c.
Vitamin A
iii.
Maize
4.
Poultry feed
d.
Soybean
iv.
Vitamin K
If the back of your hand is moistened with alcohol, you will find that it rapidly becomes dry. Why is it that while it is drying, your hand feels cool?
Study the speed-time graph of a car given alongside and answer the following questions:

  1. What type of motion is represented by OA?
  2. What type of motion is represented by AB?
  3. What type of motion is represented by BC?
  4. What is the acceleration of car from O to A?
  5. What is the acceleration of car from A to B?
  6. What is the retardation of car from B to C?
Define connective tissue. Write down functions of connective tissue.