Definition

Noun: 1. A plant disease: A specific fungal disease affecting cereal crops, primarily wheat and barley, characterized by the complete replacement of the grain head with a mass of dark, powdery spores. 2. The causal fungus: Refers to the smut fungus itself, typically Ustilago nuda or Ustilago tritici, which causes this disease.

Usage Examples

• Noun (Disease):
  • The farmer's wheat field was devastated by an outbreak of loose smut.
  • Loose smut can cause significant yield loss in barley crops.
• Noun (Fungus):
  • The spores of loose smut are easily dispersed by the wind.
  • Seed treatment is used to control the loose smut pathogen.

Advanced Usage

• "to be infected with loose smut": Describes a plant or crop that has contracted the disease.
  • The entire plot was infected with loose smut, leaving no harvestable grain.
• In agricultural science, the term is used precisely to distinguish this disease from other smuts like "covered smut" or "bunt."

Variants and Related Words

• Smut (n): The general category of plant diseases caused by fungi of the order Ustilaginales, which produce sooty spores.
• Covered smut (n): A related disease where the spores are contained within a membrane before release, unlike the exposed spores of loose smut.
• Bunt (n): Another type of smut disease affecting wheat, also known as stinking smut.

Synonyms

• Ustilago nuda (n): The scientific name for the fungus causing loose smut in barley.
• Ustilago tritici (n): The scientific name for the fungus causing loose smut in wheat.

Related Phrases

• Loose smut of barley/wheat: A more specific phrase naming the host crop.
  • The research focused on managing loose smut of barley in organic systems.

Noun

1. a smut fungus of the genus Ustilago causing a smut disease of grains in which the entire head is transformed into a dusty mass of spores
2. disease of grains; the entire head is a dusty mass of spores