17 – Employing the right farming strategies

Horses are kept inwards a broad attain of conditions. They mightiness percentage pasture amongst other farm livestock or mightiness live living inwards a unmarried paddock they stimulate got grazed for years.
They mightiness live grazing on their ain or stimulate got a few other equine paddock mates. They mightiness come upwards indoors at night, live stabled throughout the winter, or pass all twelvemonth circular at pasture.
If plenty of province is available, the opportunities for pasture rotation be inwards a way they don’t inwards to a greater extent than intensive operations, such every bit racing stables.
In short, the way inwards which your Equus caballus or horses are kept volition stimulate got a major bearing on your worm administration programme.
If you lot stimulate got exclusively a few horses too plenty grazing for some rotation, it’s probable you lot tin grapple amongst exclusively express purpose of drenches, provided you lot monitor faecal egg counts to ensure the worm burden is inside acceptable limits.
With pasture rotation too dung collection every 2 or 3 days, a Equus caballus possessor could learn downwardly to using chemic drenches 2 or 3 times a year, but egg counts must live undertaken.
More intensively grazed properties volition probable involve to a greater extent than purpose of drenches to function along the worm burden low.
It’s essential to sympathize exactly what you’re trying to attain inwards your worm command programme.
Worm eggs too larvae are non an occasional visitor to your pasture. Influenza A virus subtype H5N1 Equus caballus pasture volition probable stimulate got parasites inwards their diverse stages of evolution waiting to infect a horse, unless the pasture has been close upwards too gratis of horses for years.
In the instance of ascarids, infective larvae tin typically hold upwards inside their protective coating for 2 years and, if conditions are to their liking, upwards to 10 years.
The aim of your administration programme is thus to knock your horse’s worm burden on the caput too and so create everything you lot tin to minimise the charge per unit of measurement of re-infection – that is, the charge per unit of measurement at which it picks upwards infective larvae or eggs from the environment.
The unmarried virtually of import strategy is dung collection. Key parasites all brand their learn out from horses inwards their dung, so yesteryear collecting the manure you lot cut down the worm larvae inwards the pasture waiting to live ingested yesteryear grazing horses.
It has been demonstrated that this strategy lone volition cut down the larvae count inwards pasture yesteryear 80% or more. There is also the added create goodness that horses volition graze to a greater extent than of the paddock, given their preference to swallow grass good away from Equus caballus droppings.
Unfortunately, you lot can’t leave of absence the dung inwards the paddock for also long. Some eggs plough to infective larvae inwards nether a calendar week during warm weather. There is the farther adventure that pelting or horses knocking the dung on the way yesteryear volition help the infective larvae either into the set down or on to nearby grass to re-infect horses.
Dung should live routinely collected every 2 or 3 days and composted. If composting is done properly, the oestrus generated should live plenty to kill eggs too larvae – too furnish you lot amongst a lovely end-product for purpose on your garden.
Dung collection volition non furnish bit results every bit millions of infective larvae or eggs are probable to infest an established Equus caballus pasture. However, through regular dung collection too a regular drenching programme, over a menstruation of months the numbers inwards the pasture volition dwindle too you lot should live able to cut down the frequency of your drenching.
The results of your dung collection should eventually live apparent inwards faecal egg counts, but you lot volition quest to live patient.
The purpose of harrows to intermission upwards the dung too distribute it some the paddock has been discussed earlier, but it’s worth revisiting the pitfalls.

Certainly, if done inwards hot too dry out conditions, a skillful issue are larvae too eggs are probable to die. However, a skillful many to a greater extent than volition hold upwards too nonetheless live able to infect your horses.
Generally, inwards temperate climates, harrowing is unlikely to live effective inwards controlling parasites, too is probable to distribute the infective larvae to all corners of the paddock. This is far from desirable.
Those amongst bigger acreages too other stock stimulate got a powerful advantage.
One of the biggest enemies of parasites is time. Once a parasite reaches an infective phase inwards a paddock, it must too so play a waiting game to notice a novel host inwards the shape of a grazing horse.
While ascarids are able to prevarication inwards hold off for 2 years or more, your major nemesis, the pocket-size strongyle, tin hang on for exclusively a few weeks if conditions are warm too dry.
The benefits of rotating other livestock through pastures is discussed here.
Drenching volition show to a greater extent than effective at certainly times of the year. For example, a drench inwards early on jump is crucial every bit you lot tin bargain amongst pocket-size strongyles that stimulate got wintered over inwards your horse. If you lot tin convey out the adult strongyles too those encysted inwards the intestine wall, you lot volition become a long way towards minimising the issue of eggs beingness dropped on the pasture during the warmer months.
Two agents are effective against the toughest nut – encysted strongyles. They are moxidectin at 0.4 milligrams per kilogram of horse, too the five-day course of teaching of fenbendazole at the charge per unit of measurement of 10 millgrams per kilogram of torso weight each day, although the latter is probable to show effective exclusively if resistance is non present.
A late-summer drench volition knock dorsum the burden picked upwards over summertime too an autumn drench, only on the cusp of winter, should function along levels inside cheque over the wintertime months, over again targeting pocket-size strongyles.
A wise Equus caballus possessor mightiness hold off for a broad spectrum drench for the late-autumn too early-spring drenches containing praziquantel, which volition bargain amongst tapeworms.
The way inwards which tapeworms loose their eggs way you lot may non meet them during an egg count. It is best to assume a Equus caballus is infected too drench accordingly.
The timing of these same 2 drenching cycles volition also show especially effective against bots.
It’s essential to realise that reducing drench purpose must live based non on a whim, but on evidence through faecal eggs counts that your programme is effective.
If paddocks are heavily infested through inadequate administration practices inwards the past, it may convey a pair of years of dung collection too egg-count monitoring before a reduced drenching programme is effective inwards keeping parasites nether command inwards your horses.
Remember, too, that your drenching programme is aimed non exclusively at reducing the burden inwards your horses, but reducing the re-infection charge per unit of measurement every bit much every bit possible. That is why timing is important.
» Next: It doesn’t only stimulate got to live chemic warfare
First published on Horsetalk.co.nz inwards February, 2009
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