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Glite Dictionary
🤕 A red skin mark 🍇 A grapevine disease
red blotch

red blotch

7.7
A disease of grape plants that makes red patches on leaves or fruit
  • noun
  • Specialized
translation icon : mancha roja
  • Leaf samples showed a distinctive red blotch pattern that reduced photosynthesis in affected vines.

Examples

  • After diagnosis, growers removed the infected plant to slow the spread of the red blotch virus.

  • Scientists traced the cause of the sudden red blotch outbreaks to a newly identified grapevine virus.

  • The grapevines showed a distinct red blotch on their leaves.

  • Farmers are worried about the red blotch disease affecting their crops.

  • Farmers are worried about the red blotch disease affecting their grapevines.

  • The grapevines showed a distinct red blotch on their leaves, indicating disease.

  • Leaf samples showed a distinctive red blotch pattern, signaling infection from the grapevine virus.

How Extensive

widespread
256 3.6
red blotch
  • Specialized
7.7
patch
153 2.7
spot
297 1.0
to fleck
10 6.0

Surface Forms

red blotch singular
red blotches plural

Morphology

red + blotch

The noun phrase is directly compositional: 'red' (a color) + 'blotch' (an unevenly colored spot) yields the literal meaning of a red patch. Even though it appears in a technical viticulture context, the sense remains literal and predictable, so a B1 learner who knows the constituents will understand it.

Etymology

Red blotch in grape growing comes from the sight of bright red patches on leaves or fruit: growers saw irregular blotches and used the name red blotch for the problem. Because these spots showed a plant disease, the term now means 'a red patch on grape leaves or fruit caused by a disease'.