bulb fly: meaning, definition, pronunciation and examples

Low (Specialist/Gardening)
UK/ˈbʌlb ˌflaɪ/US/ˈbʌlb ˌflaɪ/

Technical (horticulture, entomology), Informal (among gardeners)

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Quick answer

What does “bulb fly” mean?

A small fly whose larvae feed on and damage bulbs of plants, especially narcissus and related flowers.

Audio

Pronunciation

Definition

Meaning and Definition

A small fly whose larvae feed on and damage bulbs of plants, especially narcissus and related flowers.

Any fly of the genus Merodon or other related genera within the Syrphidae family (hoverflies) whose maggots tunnel into and consume the tissue of plant bulbs, causing rot and plant death. The term is also used more broadly for other flies with similar bulb-feeding habits.

Dialectal Variation

British vs American Usage

Differences

Term is identical and used in both varieties within gardening/entomology circles. American usage might slightly more frequently specify 'narcissus bulb fly'.

Connotations

Purely a pest species; no positive or cultural connotations.

Frequency

Equally low frequency in both regions, confined to specialist contexts.

Grammar

How to Use “bulb fly” in a Sentence

The [plant] has/had a bulb fly infestation.Bulb flies attacked/damaged/destroyed the [bulbs].To treat/prevent/control bulb flies.

Vocabulary

Collocations

strong
narcissus bulb flyinfestation of bulb fliesbulb fly larvaedamage from bulb fliescontrol bulb flies
medium
affected by bulb flysusceptible to bulb flybulb fly maggotsprevent bulb fly
weak
bulb fly problemtiny bulb flybulb fly seasonfind a bulb fly

Examples

Examples of “bulb fly” in a Sentence

verb

British English

  • The daffodils have been bulb-flied.
  • We need to bulb-fly proof this bed.

American English

  • These tulips got bulb-flied last season.
  • The crop was bulb-flied beyond saving.

adverb

British English

  • Not applicable

American English

  • Not applicable

adjective

British English

  • bulb-fly damage
  • a bulb-fly infestation

American English

  • bulb fly larvae
  • bulb fly control methods

Usage

Meaning in Context

Business

Rare, except in horticultural trade discussing pest control products.

Academic

Used in entomology and plant pathology texts and research papers.

Everyday

Used by gardeners and allotment holders when discussing plant problems.

Technical

Precise term in horticultural diagnostics, pest management guides, and agricultural extensions.

Vocabulary

Synonyms of “bulb fly”

Strong

narcissus fly (Merodon equestris)lesser bulb fly (Eumerus spp.)

Neutral

bulb pestbulb maggot fly

Weak

bulb-eating flybulb-infesting fly

Vocabulary

Antonyms of “bulb fly”

bulb protectorpollinatorbeneficial insect

Watch out

Common Mistakes When Using “bulb fly”

  • Confusing it with other bulb pests like eelworms or bulb mites.
  • Using it as a general term for any fly near plants.
  • Misspelling as 'bulbfly' (should be two words or hyphenated: bulb-fly).

FAQ

Frequently Asked Questions

No. They are solely a pest to plants, specifically the bulbs of certain flowers like daffodils and hyacinths.

The adult flies are small, hairy, and resemble small bumblebees or hoverflies. They are often seen buzzing slowly near affected plants in late spring/early summer.

Good garden hygiene, removing affected bulbs promptly, and covering bulb beds with fine insect mesh in late spring to prevent the flies from laying eggs are common preventative measures.

It is most commonly written as two separate words ('bulb fly'), though you may sometimes see it hyphenated ('bulb-fly'), especially when used as a modifier (e.g., bulb-fly infestation).

A small fly whose larvae feed on and damage bulbs of plants, especially narcissus and related flowers.

Bulb fly is usually technical (horticulture, entomology), informal (among gardeners) in register.

Bulb fly: in British English it is pronounced /ˈbʌlb ˌflaɪ/, and in American English it is pronounced /ˈbʌlb ˌflaɪ/. Tap the audio buttons above to hear it.

Phrases

Idioms & Phrases

  • None. Term is purely literal.

Learning

Memory Aids

Mnemonic

Imagine a fly wearing a gardener's hat, crying because it's sad it only eats flower BULBs.

Conceptual Metaphor

PEST AS THIEF/INVADER (The bulb fly steals the health of the plant from within its stored food source).

Practice

Quiz

Fill in the gap
If your daffodils are stunted or fail to emerge, gently dig up a bulb and check for the creamy-white larvae of the .
Multiple Choice

What is the primary concern with a bulb fly?