Shoo fly: Now’s the time to suppose fly management – Farm and Dairy


horse fly

“Shoo fly!” is a what many grazing livestock, particularly beef cattle are doubtless pondering throughout the summer time months. 

As we take into consideration choices for fly management on pasture, we have now a number of choices and combos to select from. 

We will decrease the influence of flies on the herd by managing the fly inhabitants in spring and early summer time. So as to take action, timeliness is essential to having season-long success. 

Fly impacts

Blood loss, irritation, annoyance, insect switch of illness are direct losses brought on by flies. Amongst many different bovine ailments, flies are in a position to switch pathogens that trigger mastitis, pinkeye and anaplasmosis. 

Oblique losses resulting from heavy fly strain embrace decreased weight acquire and misplaced efficiency. It’s estimated that insect strain on beef cattle causes a number of billion {dollars} in losses yearly. 

Forms of flies

On pasture the 2 species of fly which might be of biggest concern are the horn fly and the face fly, whereas the home fly is probably the most ample pest in confinement livestock operations.

Whereas all flies are pests and a nuisance to livestock there are a number of variations between the 2 predominant pasture fly species. 

  Horn fly: The horn fly is an aggressive fly that can take 20-30 piercing blood meals a day from the host animal. Ninety-five p.c of horn flies shall be on the host animal at a given time and require recent manure to pupate and grow to be adults. Horn lies may be present in moderately massive numbers on the backs and facet of the livestock. The financial threshold and an appropriate aim is to have lower than 100 horn flies per facet per head of cattle. 

  Face fly: Face flies are usually much less aggressive than horn flies and are sometimes discovered close to the face of the animal. At any given time, solely 5% of a fly inhabitants could also be energetic in an animal making an attempt to get a blood meal. Typically the grownup face fly will take shelter in a barn or different shelter close to the livestock. A administration aim is to have lower than 10 face flies per head. 

Strategies for management

For the 2 predominant pasture flies, recent manure piles are key to copy and creating the subsequent era. One purpose to consider fly management in March/April is that we will doubtlessly cut back the reproductive success of the sooner generations of flies. 

This may be finished by feeding mineral components that move via the cattle and regulate insect development inside the manure piles. 

For these insect development regulator merchandise to be efficient they have to be fed 30 days previous to and 30 days after fly season, therefore why we’re discussing flies in late March. 

These merchandise, whereas efficient at managing fly populations do have some pitfalls. For max efficacy, required consumption of the IGR product have to be met by every animal within the herd. Some conflicting analysis reveals that feed-through insect development regulators could or could not harm dung beetles. 

Additionally, grownup horn or face flies aren’t affected by feeding IGR merchandise to livestock, solely larvae in recent manure. 

Fly season is true across the nook, use beforehand talked about thresholds for fly administration and management them when mandatory. Oilers, mud luggage, rubbers and insecticide ear tags will also be utilized in a fly administration program. Focus on management choices along with your veterinarian or native OSU extension educator.


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