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Ergot of rye is caused by a species of:

1. (a) Uncinula
2. (b) Ustilago
3. (c) Claviceps
4. (d) Phytophthora

Correct answer: (c) Claviceps

Solution

Ergot of rye is produced by Claviceps species, especially Claviceps purpurea. This fungus infects cereal flowers and replaces grains with dark, hardened sclerotia called ergot bodies.

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