Effect of pests and crop diseases


 
 
Concept Explanation
 

Effect of pests and crop diseases

Effect of pests and crop diseases:

1.   Insects cause a great deal of damage to crop plants. Besides destroying crops, they also transmit numerous disease-causing microorganisms. Insect pests attack plants in three ways.

2.   Locusts, dragonflies and grasshoppers cause severe damage to crops and trees by eating their leaves and stems.

3.   Bugs and beetles eat the leaves and tender shoots.

4.   Termites and white ants cause extensive damage to the roots of plants.

 

Sample Questions
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Question : 1

Which of the following are correct :

(a) White ant eat the leaves and tender shoots.

(b) Termites cause extensive damage to the roots of plants.

(c) White ants cause extensive damage to the roots of plants.

Right Option : B
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Explanation
Question : 2

____________________ cause a great deal of damage to crop plants.

Right Option : D
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Explanation
Question : 3

Which of the following are correct :

(a)  Bugs and beetles cause extensive damage to the roots of plants.

(b) Bugs and beetles eat the leaves and tender shoots.

(c) Locusts cause severe damage to crops and trees by eating their leaves and stems.

Right Option : B
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Explanation
 
 
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