INSIGHT UPSC QUIZ

Science & Technology General Science
Q.

 Which among the following method(s) is/are used by pests to attack crops sown in the field?

1. They attack the root of the plant.

2. They bore into stem and fruits of the plant. 

3. They suck water from various parts of the plant.

Select the correct answer using the code given below:

Explanation:

ANSWER: (B) 

  • Both statement 1 and 2 are correct.
  • Generally, insect pests attack the plants in three ways: 
  • They thus affect the health of the crop and reduce yields. 
  • Diseases in plants are caused by pathogens such as bacteria, fungi and viruses. These pathogens can be present in and transmitted through the soil, water and air. 
  • Weeds, insects and diseases can be controlled by various methods. One of the most commonly used methods is the use of pesticides, which include herbicides, insecticides and fungicides. 
  • These chemicals are sprayed on crop plants or used for treating seeds and soil. 
  • However, excessive use of these chemicals creates problems, since they can be poisonous to many plant and animal species and cause environmental pollution. 
  • they cut the root, stem and leaf, 
  • they suck the cell sap from various parts of the plant, and 
  • they bore into stem and fruits. 

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