The short version
Fruit fly control in Spokane, WA means removing the fermenting fruit, juice, or drain film that larvae feed on, then trapping the adults that remain. Washington's huge apple and cherry crops keep soft fruit flowing into Spokane kitchens from early summer through fall, and winter lows near 23F push the problem indoors.
- Spokane pressure starts with cherry season and peaks with apples and grapes in fall.
- Spotted wing drosophila lays eggs in sound fruit; males carry a dark wing spot.
- WSU says vinegar traps are for detection only, not control.
- After hard frost, any fly you see is breeding inside the house.
Spokane homeowners who get flies with every box of fruit, renters whose drain seems to feed them, backyard growers, and restaurant or bar operators.
What to look for
The kitchen fly, Drosophila melanogaster, lays about 500 eggs per female and can cycle from egg to adult in as few as eight days. Spotted wing drosophila is what sets Washington apart. WSU notes it attacks healthy fruit as it ripens on the plant instead of waiting for rot, and its state hosts include cherry, plum, peach, grapes, and cane fruits. Spokane's 84F summer highs speed both species, so a bruised apple on the counter becomes a nursery fast.
- 1A puff of red-eyed flies rising from the cherry bowl or apple box.
- 2Small white larvae in backyard cherries or raspberries that looked fine when picked.
- 3Flies at the disposal or sink overflow before any fruit is out.
- 4Flies landing on a glass of wine or juice.
- 5Flies in a little-used bathroom with no food nearby, pointing to a drain.
Why it’s worth acting soon
- A new generation can emerge every eight to ten days in a warm kitchen.
- Larvae leave the fruit to pupate under appliances, spreading the problem.
- An unmanaged backyard cherry or plum tree keeps spotted wing drosophila cycling until frost.
- Flies at a restaurant bar well invite complaints and inspection findings.
7.54 billion pounds from 171,000 acresWashington apple production, 2025USDA NASS 259,000 tons from 67,000 acresWashington wine and juice grapes, 2025USDA NASS About 1/8 inch, red eyesSpotted wing drosophila adult sizeWSU Hortsense Treatment options and typical costs
Source inspection
Quoted after inspection
A provider follows the flies to the fruit, recycling, drain, or leak feeding them, and separates kitchen flies from spotted wing drosophila.
- Time
- One visit
- Best for
- Flies that outlasted a cleanup
Drain and disposal cleaning
Quoted after inspection
Brushing out the disposal, overflow slot, and slow drains to remove the film larvae develop in.
- Time
- One or more visits
- Best for
- Flies at the sink after fruit is gone
Backyard fruit plan
Quoted after inspection
Timely harvest and daily drop cleanup for cherries, plums, and cane fruit. WSU says any spray belongs in the evening after bees finish.
- Time
- Through the growing season
- Best for
- Homes where a tree feeds the kitchen
Prices are typical published ranges. Ask what’s included before you compare quotes.
Compost caddies need a tight lid and frequent emptying in summer.A Spokane fruit fly calendar built around the harvest.
Once hard frost arrives, whatever still flies in Spokane is breeding indoors. The peak runs from August into October, when Washington's apples and its 259,000-ton grape crush put bins, juice, and pomace everywhere. Plums, peaches, and cane fruit follow. Cherry harvest in June and July is the first pulse, and backyard trees feed the outdoor population. In winter, with lows around 23F, nothing breeds outside, so flies in a Spokane kitchen come from a disposal, a forgotten jug, or a little-used drain.
Where fruit flies breed once the fruit is gone.
Tape clear packing tape over a suspect drain overnight; flies stuck there by morning confirm the source. Finally the yard, which no kitchen cleaning fixes. Then rarely used drains, like a floor drain or utility sink. Juice jugs, wine bottles, and cans each hold a swallow of fermenting sugar. Next, the recycling. Residue under the splash guard stays wet, and the sink overflow slot collects film almost nobody cleans. When clearing the bowl does not end it, check the disposal first.
Flies hovering around a drain often breed in the slime inside it. Tape over it overnight to check.What a first visit should include in a Spokane home.
A plan that consists only of fogging means nobody found the source. With a fruit tree in the yard, the provider should check for sound fruit with larvae inside. Expect a walkthrough of the disposal, overflow slot, fridge drip pan, floor drains, and recycling. Flies in June point to cherries and the yard, flies in October to apples and juice, and flies in February to plumbing. In Spokane the month tells half the story.
Fruit flies vs. drain flies vs. phorid flies in Spokane.
Around Spokane, the fix is different for each, so identify the fly before you clean or treat anything. With 65% humidity and warm 84°F summers, all three breed faster here. Around Spokane, WA, fruit flies (Drosophila) hover over produce and have red eyes; drain flies are fuzzy, moth-like, and breed in the gunk inside drains; phorid flies run across the counter before flying and point to a leak or a sewage break. Around Spokane, telling the three small flies apart is the whole diagnosis, because each breeds somewhere different.
What a Spokane fruit fly job should cost.
Around Spokane, ask whether the inspection is credited toward the treatment and whether the follow-up is included. Around Spokane, in this climate, the cycle runs fast, so a provider will usually schedule a follow-up about one 10-day cycle later to confirm the source is gone. Around Spokane, a one-room kitchen with a single drain or produce source is a small job; a commercial kitchen or a home with multiple suspect drains costs more because the inspection takes longer. Around Spokane, fruit fly control is priced by how much source-hunting it takes, not by how many flies you see.
What affects the price
- Whether a backyard cherry, plum, or berry planting is seeding the problem.
- How many drains and overflows need cleaning.
- Fruit flies versus fuzzy drain flies.
- A leaking trap or dishwasher line that must be repaired first.
- A home kitchen versus a restaurant or tasting room with floor sinks.
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Where do you see the most fruit flies?
When to call for help
Call a pest control company when flies remain ten days after you refrigerated the fruit, rinsed the recycling, and brushed the disposal. In Spokane that usually means a drain or leak is feeding them, or a yard tree keeps sending a new batch to the kitchen window. Bars and restaurants with flies at the well should not wait.
What you can do yourself
DIY stalls when a backyard tree or a hidden drain keeps restocking the kitchen. Treat the catch as a gauge, since WSU calls traps detection tools. Move cherries and apples to the fridge, pour out old juice, rinse bottles, brush the disposal, and set a jar of cider vinegar with a drop of dish soap. You can beat the harvest case yourself.
Fruit Flies in Spokane
Spokane is an urban city of roughly 231,000, founded in 1871 and known for Gonzaga, Riverfront Park, and Hoopfest. It sits at 1,843 feet with 84F summer highs, 23F winter lows, 65 percent humidity, and about 17 inches of rain. Open spills dry quickly here, but heated houses keep drain film alive through winter. Washington's 2025 harvest included 7.54 billion pounds of apples and 259,000 tons of wine and juice grapes by USDA count, and that fruit moves through Spokane kitchens during the August to October peak. The median home value is about $370,000. Around Spokane, the warm summer continental climate means fruit flies activity tends to follow late summer and fall; year-round indoors, so scheduling the visit before the busy stretch usually means a faster response and a cleaner quote. Around Spokane, comparing written quotes side by side is the easiest way to see what is actually included, because the scope, prep steps, and follow-up terms vary a lot between providers.
Local research
Fruit Flies in Spokane, WA: what the public record shows
Before you compare quotes, it helps to know which fruit flies actually live in Washington, when they are busiest around Spokane, and what the state figures look like. Everything below links to the agency or university page it came from.
Spotted wing drosophila identification in Washington
Red eyes and that wing spot are how a Washington homeowner tells a fruit-infesting SWD from the ordinary kitchen vinegar fly.
Hortsense, Washington State UniversityWashington fruits vulnerable to spotted wing drosophila
Nearly every soft fruit grown in the state is a host, which is why outdoor populations are large enough to spill into houses.
Hortsense, Washington State UniversityWashington apple production
The country's largest apple crop means fruit bins, culls and juice residues on a scale no other state matches, and packing houses are a fruit fly source year-round.
USDA National Agricultural Statistics ServiceWhen fruit flies are busiest around Spokane
Pressure builds with cherry harvest in early summer and peaks through the apple and grape harvest in late summer and fall, when crush and packing residues are heaviest.
WSU's Hortsense notes that spotted wing drosophila attacks healthy fruit as it ripens on the plant rather than waiting for it to rot, and that vinegar traps are for detection only. Chemical controls reach adults only and should be applied in the evening after bees have finished working.
Sources: Hortsense, Washington State University; USDA National Agricultural Statistics Service; University of Maryland Extension; Texas A&M AgriLife Extension. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep fruit flies away
- Refrigerate cherries the day they come home.
- Keep juice and cider cold and rinse containers before recycling.
- Pick backyard fruit as it ripens and clear drops daily.
- Brush the disposal splash guard and sink overflow slot weekly in summer and fall.
- Run hot water through rarely used drains.
- Close blinds at dusk so yard flies are not drawn through screens.
A good quote names the fly, the source, and whether follow-ups are included.Did you know?
WSU identifies male spotted wing drosophila by a dark mark close to the tip of each wing.
Washington's 2025 apple crop was valued at $1.885 billion by USDA count.
Maryland Extension says larvae eat for five or six days before moving somewhere drier to pupate.
Questions people ask
Why does Spokane get fruit flies every summer?
Cherry season starts it. USDA counts 261,000 tons of Washington sweet cherries from 40,000 acres, and WSU lists cherry among the fruits spotted wing drosophila attacks. Cherries left on a Spokane counter in 84F weather ferment fast.
What sets spotted wing drosophila apart from a kitchen fruit fly?
Look at the wings. WSU says males carry a dark spot near the wing tip, while ordinary kitchen flies have none. Larvae inside a cherry that looked fine when picked also point to spotted wing drosophila.
Do vinegar traps get rid of fruit flies?
They catch adults but cannot end an infestation, and WSU calls them detection tools. With about 500 eggs per female, no jar keeps up with a live source in a Spokane kitchen.
Do fruit flies die in a Spokane winter?
Outdoors, yes, since lows near 23F end the yard population. Indoors they continue wherever fermenting material remains. A fly in a Spokane kitchen in January means a drain or storage source, not leftover harvest.
Can I spray my cherry tree for fruit flies?
Any spray on a Spokane tree reaches only adults, WSU says, and belongs in the evening once bees have quit for the day. Timely picking, daily drop cleanup, and chilling fruit right away do more good.
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rewrite-v2 Published by Fruit Fly Exterminator · Updated October 11, 2026 · How we write these guides