Tagetes and garlic are two crops that act as antagonists to…

✅Explanation:
Tagetes (marigolds) and garlic are known for their nematicidal properties, particularly against root-knot nematodes

• Mechanism of Action:
Tagetes: Marigolds release alpha-terthienyl, a phototoxic compound that damages nematodes upon exposure to sunlight. Additionally, marigolds produce other compounds that interfere with nematode hatching and development.
Garlic: Garlic releases allicin, a sulfur-containing compound with strong nematicidal activity. Allicin disrupts various cellular processes in nematodes, leading to their death.