A type of resistance in which a series of different cultivars of the same crop are infested with a series of different insect biotypes of same species show a differentia interaction is known as_________________?
Correct answer: A. Vertical resistance
- A. Vertical resistance
- B. Horizontal resistance
- C. Specific resistance
- D. Cross resistance
Explanation
A differential reaction between particular cultivars and insect biotypes indicates specific, or vertical, resistance. Its effectiveness changes with the cultivar-biotype combination, unlike broad horizontal resistance.
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