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WAEC Agricultural Science 2018 Question 29

Question 29

Crop Diseases

An effective method of preventing viral diseases in crops is by

  1. A.treating the seeds with fungicides.
  2. B.practising crop rotation.
  3. C.regular spraying of crops.
  4. D.planting resistant varieties.
Show the answer and explanation

Answer: D (planting resistant varieties.)

Explanation

Viruses can't be killed with chemicals; resistant varieties prevent the disease.