Smallholders Insurance from Greenlands

Author Topic: Does crovect work in the rain? Or will it just wash off?  (Read 14379 times)

FiB

  • Joined Sep 2011
  • Bala, North Wales
    • Facebook
Does crovect work in the rain? Or will it just wash off?
« on: September 16, 2012, 03:13:21 pm »
GOt a sheep that I suspect has flystrike - first attempt at gathering her in to inspect and treat failed this morning.... have now borrowed some hurdles for 2nd attempt - but its peeing down.  Only noticed bare patch (base of back, clean area) this morning and I do look every day, so it may not be flystrike (but I know if it is time is of the essence).  She is extremely sprightly and grazing normaly, not seen her biting or scratching the area...  Anyway, main question is does it need to be dry for crovect to be effective?  Will have to make some sort of temporary field shelter and lure her in if so.  If not will get on with application asap.

jaykay

  • Joined Aug 2012
  • Cumbria/N Yorks border
Re: Does crovect work in the rain? Or will it just wash off?
« Reply #1 on: September 16, 2012, 03:42:38 pm »
It's quite oily stuff. Takes a couple of washes sometimes to get it out of trousers i've spilled it on. So I don't think rain would get rid of it too easily.

FiB

  • Joined Sep 2011
  • Bala, North Wales
    • Facebook
Re: Does crovect work in the rain? Or will it just wash off?
« Reply #2 on: September 16, 2012, 03:51:58 pm »
Thanks JK, I'll go and do now then.  :raining:   Cheers, F xx

JFDI

  • Joined Aug 2012
  • Hertfordshire
Re: Does crovect work in the rain? Or will it just wash off?
« Reply #3 on: September 16, 2012, 04:02:13 pm »
Crovect is an insecticide and will kill the maggots as you watch.  That's what I keep it for, mostly.  For treating a strike it provides instant revenge, but it is a short term treatment anyway and will wash out in these conditions.

Clik is a long-term prevention treatment that works differently.  But it binds into the fleece and will be effective on a damp sheep.  I imagine Clikzin does the same.

Clikzin has only a 7 day meat withhold so is a far better prevention at this time of the year.  The active ingredient is the same in both and is quite nasty.

jaykay

  • Joined Aug 2012
  • Cumbria/N Yorks border
Re: Does crovect work in the rain? Or will it just wash off?
« Reply #4 on: September 16, 2012, 04:11:04 pm »
Crovect has to be repeated in four weeks, but hopefully the fly season will be over by then?

shep53

  • Joined Jan 2011
  • Dumfries & Galloway
Re: Does crovect work in the rain? Or will it just wash off?
« Reply #5 on: September 16, 2012, 06:34:40 pm »
Crovect will kill maggots in the wet but will not persist .  NOVARTIS say  for blowfly protection apply to dry or damp not wet wool and it needs 4 hours to settle and dry, or it will wash out and/ or weaken in strength .  6_8 weeks is the repeat time for blowfly protection  , 4 weeks for headfly :raining:

Bramblecot

  • Joined Jul 2008
Re: Does crovect work in the rain? Or will it just wash off?
« Reply #6 on: September 16, 2012, 07:48:56 pm »
It is great for killing the little horrors but I don't think it will last if you put it on in the rain :raining: . We had a small amount of strike which caught us out in October last year.

JUNIOR MEMBER pufflepets

  • Joined Aug 2012
Re: Does crovect work in the rain? Or will it just wash off?
« Reply #7 on: September 16, 2012, 10:18:43 pm »
Personally,  I would pour on Battles maggot oil as that is certainly not rain-washable, the maggots hate it (they literally rolled off my sheep when I used it before) , it prevents further fly attacks and helps sooth the struck skin area whilst you have rain and if you have sun tomorrow (or at least dry weather) whack the Crovect on!

SteveHants

  • Joined Aug 2011
Re: Does crovect work in the rain? Or will it just wash off?
« Reply #8 on: September 16, 2012, 11:35:11 pm »
I've heard farmers saying that crovect (or dysect, they are similar/the same) lasted far better in the summer monsoon than Clik did. Could be because its oily.

SallyintNorth

  • Joined Feb 2011
  • Cornwall
  • Rarely short of an opinion but I mean well
    • Trelay Cohousing Community
Re: Does crovect work in the rain? Or will it just wash off?
« Reply #9 on: September 17, 2012, 12:57:36 am »
When using Crovect as a preventative measure, I've always been advised to apply Crovect to dry sheep and to keep them dry for at least an hour or two afterwards.

It'll kill maggots in any conditions, so far as I have seen.
Don't listen to the money men - they know the price of everything and the value of nothing

Live in a cohousing community with small farm for our own use.  Dairy cows (rearing their own calves for beef), pigs, sheep for meat and fleece, ducks and hens for eggs, veg and fruit growing

JFDI

  • Joined Aug 2012
  • Hertfordshire
Re: Does crovect work in the rain? Or will it just wash off?
« Reply #10 on: September 17, 2012, 03:19:01 am »
I've heard farmers saying that crovect (or dysect, they are similar/the same) lasted far better in the summer monsoon than Clik did. Could be because its oily.
We've had the worst conditions for greenbottles I've ever seen and we've had lots of partial strikes where eggs have been laid and hatched but then killed by the Clik leaving a hole in the fleece but no skin damage.  My money is still on Clik for protection

 

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