Updated: July 6, 2025

Blow flies, often recognized by their metallic blue, green, or black bodies, are a common nuisance in both residential and commercial environments. These flies are more than just an annoyance; they can pose serious health risks due to their association with decaying organic matter. If you’re dealing with a blow fly infestation, you might wonder whether professional exterminators handle these pests. The short answer is yes—professional exterminators do deal with blow fly issues, and their expertise is often essential for effective and safe removal.

In this comprehensive article, we will explore who blow flies are, why they are problematic, how professionals handle infestations, and why DIY methods may fall short.

What Are Blow Flies?

Blow flies belong to the family Calliphoridae and are typically among the first insects to arrive at decomposing animal carcasses or organic waste. Their role in nature is important—they help break down dead matter through their larvae (maggots). However, when blow flies invade homes or businesses, their presence is unwelcome.

Identification

Blow flies are medium to large-sized flies characterized by:

  • Metallic hues: Often shiny blue, green, or black bodies.
  • Size: Usually 6 to 14 mm long.
  • Distinctive wing venation and bristle patterns (used primarily by entomologists).

They are most active during warmer months but can be present year-round in warmer climates or heated environments like homes and food facilities.

Why Are Blow Flies a Problem?

Blow flies signal the presence of decomposing organic matter nearby, which could mean a dead animal, spoiled food, or other sanitation issues. Their ability to transmit bacteria makes them a public health concern.

Health Risks

Blow flies can carry pathogens such as:

  • Salmonella
  • E. coli
  • Shigella
  • Other bacteria responsible for foodborne illnesses

Because they frequent unsanitary environments before landing on human food or surfaces, they act as mechanical vectors for diseases.

Property Damage

While blow flies themselves don’t cause structural damage like termites or carpenter ants, their maggots feed on organic material and can cause unpleasant odors and hygiene problems. Additionally, an unchecked infestation can lead to secondary pest problems.

Impact on Businesses

For businesses involved in food preparation and handling—restaurants, grocery stores, food processing plants—blow fly infestations can lead to regulatory violations, fines, damaged reputation, and even closure.

Can You Handle Blow Fly Problems Yourself?

Many homeowners attempt to tackle blow fly infestations using over-the-counter insecticides or home remedies. While these methods might provide temporary relief, they rarely address the root cause of the problem.

Challenges of DIY Approaches

  • Identifying Breeding Sites: Blow flies lay eggs on decomposing organic matter. Without locating and removing this source (often hidden), any treatment will be ineffective.
  • Limited Reach: Store-bought sprays may kill adult flies but do not affect eggs or larvae.
  • Health Risks: Improper chemical use can harm humans, pets, and beneficial insects.
  • Reinfestation: Without proper sanitation and exclusion methods, blow flies will return quickly.

Given these challenges, professional intervention is often the best solution.

How Do Professional Exterminators Deal With Blow Fly Issues?

Professional pest control companies have the knowledge, tools, and experience to manage blow fly infestations effectively while minimizing risks.

Step 1: Inspection and Identification

Exterminators begin with a thorough inspection of the property to:

  • Identify the species of fly (to confirm it is a blow fly).
  • Locate breeding sites such as dead animals in walls or attics, garbage buildup, spoiled food storage areas.
  • Assess the extent of the infestation.

This step is crucial because treating symptoms without addressing the source leads to failure.

Step 2: Source Removal

Once the breeding site is located:

  • Professionals safely remove decomposing organic material.
  • In cases where an animal has died inside walls or inaccessible spaces, specialized techniques may be needed to remove it.
  • Sanitation efforts follow source removal to discourage further infestation.

Step 3: Targeted Treatment

After source removal:

  • Targeted insecticide treatments are applied to affected areas.
  • Treatments may include residual sprays that kill adult flies on contact and continue working for weeks.
  • Larvicides may be used in certain situations to kill maggots.
  • Professionals also apply fly baits or traps strategically if needed.

Step 4: Exclusion Measures

To prevent future problems:

  • Exterminators inspect entry points such as windows, doors, vents, screens.
  • They recommend sealing cracks and gaps where flies enter.
  • Installing or repairing screens on windows and doors helps keep adult blow flies out of indoor spaces.

Step 5: Follow-Up Monitoring

Effective pest control often requires several visits:

  • Professionals monitor treated areas for recurring activity.
  • They adjust treatments as necessary based on conditions.
  • Education about proper sanitation practices is provided to clients.

Benefits of Hiring Professional Exterminators for Blow Fly Control

When facing a blow fly problem, engaging professionals comes with multiple advantages:

Expertise in Pest Biology and Behavior

Understanding blow fly life cycles enables precise targeting of vulnerable stages—eggs, larvae, pupae, adults—to break the infestation effectively.

Comprehensive Approach

Professionals don’t just kill visible flies—they find and eliminate breeding sites and implement exclusion measures to stop reinfestation.

Safe Use of Chemicals

Exterminators use EPA-approved products applied according to safety guidelines to protect occupants while achieving pest control goals.

Time and Cost Efficiency

Attempting DIY fixes repeatedly wastes time and money with limited results. Professional services offer faster resolution that ultimately saves money by preventing recurring issues.

Guaranteed Results

Many pest control companies offer service guarantees or follow-up visits at no extra cost if problems persist after treatment.

Preventing Blow Fly Infestations After Treatment

Post-treatment prevention is key for long-term success:

  • Keep garbage bins tightly sealed; dispose of waste regularly.
  • Store food properly; clean up spills promptly.
  • Regularly inspect your property for signs of dead animals or other organic debris.
  • Maintain cleanliness in kitchens and waste areas.
  • Repair window screens and seal cracks promptly.

Conclusion

Blow fly infestations are more than just a nuisance—they pose health risks that require prompt attention. While DIY treatments might seem appealing initially, they often fail to resolve underlying causes fully. Professional exterminators specialize in identifying source problems like hidden carcasses or decaying matter that sustain infestations. Through inspection, safe removal of breeding sites, targeted insecticide application, exclusion measures, and follow-up monitoring, pest control experts provide comprehensive solutions that restore comfort and safety to your home or business.

If you suspect a blow fly issue in your property—don’t wait until it worsens. Contact a licensed professional exterminator who can efficiently address your problem with expert care. Their knowledge and tools ensure both immediate relief from annoying pests and long-term prevention against future invasions.

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