Definition

Noun A plant disease affecting alder trees, specifically caused by an infestation of the woolly alder aphid (Prociphilus tessellatus), a type of plant louse. The "blight" refers to the damaging effect on the tree, often characterized by stunted growth, leaf curl, and a sooty mold that grows on the honeydew secreted by the aphids.

Usage

The term is used specifically in botany, forestry, and horticulture to describe this particular aphid-induced condition in alder trees. * The forester identified alder blight as the cause of the stunted growth along the riverbank. * While unsightly, alder blight is rarely fatal to mature alder trees.

Advanced Usage

• The term is a compound noun naming a specific pathological condition. It is typically used in a technical or observational context rather than in common speech.

Variants and Related Words

• Woolly alder aphid: The insect pest that causes alder blight.
• Plant blight: A general term for any widespread disease causing damage and death in plants.
• Infestation: A state of being overrun by pests, which is the direct cause of the blight.

Synonyms

• Aphid infestation (of alders)
• Woolly aphid damage (on alders)

Related Phrases/Idioms

• To be blighted: This verb form can be used to describe the state of the tree.
  • The stand of alders was blighted by the persistent aphids.

Noun

1. a disease of alders caused by the woolly alder aphid (a plant louse)