Useful tool for preventing blow-fly strike and ticks
We use this when the weather warms up in spring. As it lasts up to 8 weeks, we apply early May and it will last till we shear early July, then we use Clik to see us through the rest of the risk season. While Crovect only protects against fly strike where it touches the fleece, we find a good spray around the tails and one down the back seems to protect them till shearing time and it also clears up the spring flush of ticks. If a sheep does get struck and you catch it early enough, the crovect also kills the maggots. This product is definitely part of our armoury against fly strike.
Dosage and administration
Crovect is administered by means of a Youngs Pour-on gun as follows:
5 ml per 20 kg bodyweight, up to a maximum of 20 ml.
Using the straight nozzle on the applicator gun, apply as a pin stream from the shoulders to the rump along the middle of the backline.
Sheep may be treated off-shears or anytime during the year.
Adult sheep and lambs over 10 kg – 10 ml per 20 kg bodyweight, up to a maximum of 40 ml.
Lambs under 10 kg – 5 ml followed 3 weeks later by a 10 ml application.
Using the straight nozzle on the applicator gun, apply as a pin stream from the crown of the head to the top of the rump.
5 ml per animal irrespective of size.
Apply to the top of the head between the ears, using the T-bar nozzle.
Take care not to apply the product in the sheep's eyes.
One application of Crovect before the start of the headfly season will give up to 4 weeks protection.
Re-treat as required.
Prevention of blowfly strike:
Apply as a fan-spray to the surface of the fleece on the back and hindquarters of the sheep using the applicator gun fitted with a fan spray nozzle. Half the dose should be applied on the shoulders, back and flanks and half to the rump. The distance between the nozzle and the fleece should be approximately 20 cm. Each dose will require 2 or 3 sweeps to apply. The product will prevent blowfly strike only on areas covered by spray. One application will give 6–8 weeks protection. Re-treat as required.
Treatment of Blowfly Strike
Apply directly all to the affected parts at the rate of 2.5 ml per 100–150 cm2 (roughly the size of a hand). The T-bar nozzle should be used. Most strikes will require 5–10 ml. Ensure that all affected parts are treated. A single application is sufficient to ensure that larvae are expelled and killed within a few hours.
This product contains a blue dye to aid in the identification of treated animals. The colour is temporary and will fade from the fleece within 48 hours of application.
Contra-indications, warnings, etc
Not to be used in lambs less than 1 week old.
Avoid treating very young lambs if the weather is unseasonably hot.
For the prevention of blowfly strike; do not adminsiter to animals of less than 12.5kg bodyweight.
Take care not to apply in the sheep's eyes. This precaution should be observed particularly when treating breeds with little wool on their heads. Crovect minimises mothering-up problems after treatment. However, care must be taken not to apply the product right to the lamb's tail as a ewe recognises a young lamb by the smell of the tail area.
WEAR PROTECTIVE CLOTHING, RUBBER GLOVES AND BOOTS when applying the product.
WEAR A DUST MASK when applying as a fan-spray for the prevention of blowfly strike.
WASH SPLASHES from skin and eyes immediately.
DO NOT EAT, DRINK OR SMOKE when using the product.
WASH HANDS AND EXPOSED SKIN before eating, drinking or smoking and after work.
USE IN A WELL-VENTILATED AREA.
Meat - Animals must not be slaughtered for human consumption during treatment. Sheep may be slaughtered for human consumption only after 8 days from the last treatment.
Milk - Not to be administered to animals producing milk for human consumption.
HARMFUL TO FISH. Do not contaminate ponds, waterways and ditches with the product or the used container. Dispose of unused product and containers in accordance with guidance from your local waste regulatory authority e.g. The local regional office of the Environment Agency or SEPA
For external use only.
For animal treatment only.
Store in tightly closed original container, in a safe place. Do not store above 25°C. Do not store container in direct sunlight.
Store away from food, drink and animal feedstuffs.
POM-VPS (previously PML).
0.8, 2.2 or 5 litre backpacks.
Crovect must be applied only with the recommended applicator gun as the product may have a detrimental effect on certain components of conventional dosing guns. Full operating and maintenance instructions, including details on the use of nozzles, are supplied with each applicator gun. Maintain applicator gun carefully to ensure accurate dosage.
Blowflies are attracted by dirty, damp wool or open wounds. The most common site for flystrike is the rump, due to soiling caused by diarrhoea and urine staining. The efficacy of Crovect is reduced in the presence of soiled and dirty wool. Therefore sheep must be crutched (dagged) regularly and appropriate worm control measures employed.
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