Horn Flies

Pest Description

• Dark gray
• Two dark stripes on thorax with diffuse marks
• Extended piercing proboscis
• 4 to 5 mm long

Life Cycle

• Complete life cycle takes 10 to 21 days
• Adults spend their entire lives on cattle
• Female lays up to 500 small, reddish brown eggs on fresh manure
• Eggs hatch into maggots and mature to pupa

Food Source

• Feed on the blood of cattle; live on or around the shoulders and backs of cattle, moving to the belly on hot days or in rain storms

Threat

• Can result in production losses caused by anemia, reduced weight gain, and a general weakening of the animals

Control Method

• CyLence^® Pour-On Insecticide
• Co-Ral^® Fly and Tick Spray
• Co-Ral^® Emulsifiable Livestock Insecticide
• Corathon^™
• CyGuard^™

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