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

Derived forms: alder blights

Type of: blight

• headlight
• headlike
• headline
• headliner
• headlinese
• headlock
• headlong
• headman
• headmaster
• headmastership
• headmistress
• headmistressship
• headmost
• headnote
• headphone
• headpiece
• headpin
• headquarter
• headquarters
• headquarters staff
• headrace
• headrest
• headroom
• heads-up
• heads-up display