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प्रश्न
How the resistance in crops can be developed?
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उत्तर
- Development of morphological characters like hairy leaves in cotton and wheat develop vector resistance from jassids and cereal leaf beetle, respectively.
- Solid stem in wheat leads to resistance to stem borers.
- Biochemical characters provide resistance to insects and pests. For example, the high aspartic acid, and low nitrogen and sugar content in maize, lead to resistance against stem borers.
- The nectar-less cotton having smooth leaves develop resistance against bollworms.
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