The viral disease can be controlled by_________________?
Correct answer: C. Growing resistant varieties
- A. Organo-chlorine pesticides
- B. Pyrethroids
- C. Growing resistant varieties
- D. None of the above
Explanation
Viruses cannot usually be killed inside an infected plant with insecticides, so management relies on resistant varieties, healthy planting material and control of vectors. Organo-chlorines and pyrethroids may control insect vectors but do not directly cure viral disease.
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