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Defoliant used during seed production
EXPLANATION
Field Crop Seed Production
- Defoliation in Seed Production: Chemical defoliation is applied before seed harvest to induce uniform leaf drop, terminate vegetative growth, accelerate pod/boll ripening, and facilitate mechanical harvesting without trash contamination.
- Active Defoliant: Ethephon (2-chloroethylphosphonic acid) releases ethylene gas in plant tissues, triggering rapid senescence and abscission layer formation at petiole bases. (Correct answer: Option 4)
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