Guard Against Bot-Fly Damage

Take action to remove any remaining eggs from your horse’s haircoat to guard against bot-fly damage.

The bot fly, which lays its eggs on your horse’s legs and sides, can seriously compromise his health.
Shelley Paulson

Bot-fly larvae can wreak havoc in your horse’s stomach lining, causing significant swelling and ulceration. Large infestations can even lead to colic. The larvae originate as sticky little yellow eggs deposited on your horse’s legs and sides by the female bot fly (which resembles a bumblebee in action). The first hard frost of the season will kill off the flies, making it a great time to administer a dewormer effective against bot larvae (left). If you then take action to remove any remaining eggs from your horse’s haircoat (below), you’ll complete your protection plan.

[READ: 5 Cheap & Easy Ways to Improve Horse Health]

Remove Those Eggs

“Scrape off with a knife” photo courtesy of SmartPak; “Rub off with a block” photo by Jennifer Paulson

Scrape off with a knife

A bot-egg knife removes the nits before they can be inadvertently ingested by your horse.

Rub off with a block

A grooming stone will remove bot-fly eggs and can also be used to loosen shedding hair.

Check Dewormer Labels 

Zimecterin dewormers contain ivermectin, a broad-spectrum ingredient effective against bot-fly larvae as well a wide variety of other parasites. The Gold formulation also includes praziquantel, which additionally controls tapeworms (zimecterin.com).

Not all dewormers are effective against bots, so read product labels carefully. Avermectins (ivermectin and moxidectin) are the only approved over-the-counter dewormers for control of bot-fly larvae.

Ivermectin has a broad spectrum of activity against intestinal and insect parasites, including bots; it also kills migrating larvae.

Moxidectin, introduced as an equine dewormer in the U.S. in 1997, is effective against encysted small strongyles as well as bot-fly larvae.

Share
Related Articles
HR_24BON_Health_Electrolyte-Supplementation_01
Electrolyte Supplementation
Thoroughbred yearlings in pasture at sunset
Green Grass Galore
Tip of the Week: How To Transition Your Horse to Green Grass
Horse with colic lie down and sleep outside
Quick Tips for colic Prevention
Colic Prevention Tips
Insektenplage. Schönes Pferd frei zwischen gelben Blumen auf einer Wiese wird von Insekten attackiert
Spray Smart
Savvy Spraying: Select the Right Fly Spray for the Task at Hand
Newsletter
Receive news and promotions for Horse & Rider and other Equine Network offers.

"*" indicates required fields

Name*
Country*

Additional Offers

Additional Offers
This field is for validation purposes and should be left unchanged.