Local fruit fly information

Fruit Fly control in Colorado

Learn what to look for around your property, explore your city, and ask about an inspection or a quote.

Fruit Flies in Colorado: what to know

Around Colorado

Conditions vary across the state. Choose your city below, then describe what’s happening around your home or business.

What to note

Where you see fruit flies, how long it has been going on, and anything you’ve already tried are the most useful details to mention.

A useful next step

Ask about an inspection, what treatment would involve, and whether follow-up visits are included. You don’t need to identify the problem yourself before getting in touch.

Local research

Fruit Flies in Colorado: what the public record shows

Before you compare quotes, it helps to know which fruit flies actually live in Colorado, when they are busiest, and what the state figures look like. Everything below links to the agency or university page it came from.

Colorado State University Extension describes small fruit flies (vinegar flies) as 2.0 to 2.5 mm long with bright red eyes

Vinegar fly size and eye color

Size and red eyes separate a true vinegar fly from a fungus gnat or drain fly, and that distinction decides whether to attack fruit, potting soil or a drain.

Colorado State University Extension

CSU Extension reports vinegar fly populations are greatest in late summer and early fall during harvest season

Peak indoor season

Colorado kitchens see the worst pressure when Western Slope fruit and garden produce come indoors in volume from August through October.

Colorado State University Extension

CSU Extension notes vinegar flies breed in overripe fruit and in residues in unwashed beer and beverage containers, and are attracted to open bottles of wine, beer and vinegar; recommended trap baits are cider vinegar, red wine, or mashed banana and beer in a jar fitted with a paper cone

Beverage containers as a breeding source

In a state with a dense brewery and taproom scene, unrinsed recycling and draft lines are a documented source that cleaning the fruit bowl alone will not fix.

Colorado State University Extension

When fruit flies are busiest in Colorado

CSU Extension states indoor vinegar fly populations are greatest in late summer and early fall during harvest season; outdoors, spotted wing drosophila numbers rise rapidly in early July and peak in August and September.

Colorado State University Extension recommends a homemade trap of cider vinegar, red wine, or mashed banana and beer in a jar with a paper cone for indoor vinegar flies, and for spotted wing drosophila advises apple cider vinegar traps placed in shaded canopy and "checked regularly, at least once a week." Fact Sheet 5.596 (Whitney Cranshaw, reviewed August 2025) also carries a table of SWD host plants observed in Colorado, with raspberry, strawberry and blackberry most favored.

For context, nationally

8 to 10 days egg to adult — Life cycle length. University of Maryland Extension
As few as 8 days — Fastest life cycle under optimum conditions. Texas A&M AgriLife Extension

Sources: Colorado State University Extension; University of Maryland Extension; Texas A&M AgriLife Extension. Figures are quoted as the source prints them. How we check our sources

Explore Colorado cities

Arvada

Semi-Arid · suburban setting

Fruit Fly control in Colorado

Fruit Flies in Colorado: what to know

Around Colorado

What to note

A useful next step

Fruit Flies in Colorado: what the public record shows

When fruit flies are busiest in Colorado

For context, nationally

Explore Colorado cities

Arvada

Aurora

Boulder

Broomfield

Castle Rock

Centennial

Colorado Springs

Denver

Fort Collins

Grand Junction

Greeley

Lakewood

Longmont

Loveland

Parker

Pueblo

Thornton

Westminster

Commerce City

Ask about fruit fly control in Colorado