Leaving struck sheep in the mob attracts more blowflies.One of the dicyclanil or cyromazine preventatives may also be applied if longer ongoing protection is required. There is a high level of resistance to the organophosphate, diazinon, which may reduce its effectiveness in killing larger larvae. Where maggots may remain, a dressing that rapidly kills maggots should be applied these contain either ivermectin, spinosyn or organosphosphates. Vetrazin), when applied alone, are not suitable on welfare grounds, as maggots will take up to 4 days to die. Where maggots remain, the two common flystrike preventatives, dicyclanil (e.g. A dressing has two purposes: to kill remaining maggots and to prevent re-strike as the affected area is drying and healing. Note: A product registered as a flystrike “dressing” is different to a preventative.Ensure a product with a suitable withholding period is chosen. If necessary, these treated sheep may be jetted or backlined along with other susceptible sheep to provide long-term flystrike protection.
Apply a registered flystrike dressing to the shorn area to prevent re-strike. Unless maggot infested wool is collected and bagged, most maggots will survive and pupate and come back as adult flies.ģ. Don’t rely on registered flystrike dressings to kill maggots-some are incapable of killing large maggots and many maggots escape treatment by dropping from the sheep and burrowing into the soil before the insecticide can be applied.This breaks the life cycle, which is especially important if the maggots have survived on sheep that have had a preventative product applied previously and these maggots are resistant to the product.Collect the maggot-infested wool into a maggot-proof (plastic) bag and leave the bag in the sun for a couple of days to kill all maggots. Machine-shearing (including cordless electric shears) is generally better than hand-shearing.Ģ.Unless wool is shorn off it is likely that maggot trails will be missed and sheep will remain struck.
Fly strike skin#
Shear struck wool and a 5 cm barrier of clean wool around the strike close to the skin to remove maggots. The recommended way to treat flystruck sheep: 1.
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