A type of resistance in which a series of different cultivars of the same crop are infested with a series of different insect biotype of same species show no differentia intersction, such type of resistance is___________________?
Correct answer: D. Horizontal resistance
- A. Specific resistance
- B. Cross resistance
- C. General resistance
- D. Horizontal resistance
Explanation
Horizontal resistance shows no differential interaction between crop cultivars and insect biotypes, so its effectiveness is relatively broad. Specific resistance, in contrast, depends on particular cultivar and biotype combinations.
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