Start a new thread

1 to 20 of 24 replies

Loggerd on to find about carrot fly. Found organic and crop rotation. What about prevention and cure?
As regards to crop rotation some people seem to grow some crops on same plot year after year, how do they manage this? I would be very interested to hear comments. Many thanks
The best solution to prevent carrot fly, which i have found is by putting wind breakers (what you use for camping or the beach ) round your carrot plot , but make sure you hammer the poles right down so not to allow any gap between earth and breaker try this it's the best solution ever.. ( second hand or old wind breakers are perfect.) Make sure there is no gap between joining poles when putting wind breakers together..
Peat B
I found that growing the purple variety of carrot seems resistant to carrot fly. I grew three patches of carrot this past year, and the ordinary common orange carrot was touched by the fly, but the purple type was virtually unscathed.
All this stuff about growing garlic or onions close by has not proved successful here in Northumberland. The best method is, for me, to lay fleece over the seeds and this is the necessary barrier to prevent the fly invading.



I grow all my carrots in willow planters which are a height of about 18 inches.  I have never had trouble with carrot fly as I think they fly lower to the ground than this.   

I was told by a market gardener that carrot fly cant fly more than a foot or so high,is this right! any way i have made a plastic fence and put around my carrots, I,ll just have to wait and see.Lu.

It's true - carrot fly cannot reach above about 18 ins but most important, when thinning or picking carrots try not to disturb the foliage too much and NEVER leave a bit of leaf laying on the ground.  Pick up every scrap and take it far away from the remaining carrots.  The broken foliage gives off a heavy scent which the fly picks up on. 

I put my carrots between tall growing veg like sprouts and haricot vert and take a softly, softly approach to thinning, harvesting and weeding around them.  I also grow a row of marigolds alongside.  So far this seems to work for me.

Simply grow under fleece. The total answer with no negatives
muddy mare

This year i planted a row of tagetes then a row of chives either side my carrot plot and so far .....touch wood no fly looks pretty tooo

Hi,,is there anything that can be used against CLUBROOT,,my books are all really old and the remedies that are in them are all defunct now,,,
Oakley Witch
Hi Simmo45, I dont think there is. I had it at the farm and they said the only way to get rid was to remove all the infected soil and replace it. It can last upto 20 years in the soil. I did however see a wee bit on a programme (cant remember where it was) but the guy said he added loads of fresh compost with a mix of lime and sand. He didnt have a problem where as the rest of the allotment had infected soil.
Oakley Witch
Oh, sorry. I grow my carrots in pots/tubs. Always had a great harvest and no worms
Lime was the traditional natural deterrent to club root....Ive never suffered club root but my veg patch is neutral to alkaline. Have you tested your soil Simmo45?

Hi,thnx for all tips and info,,just getting things ready for new season ,,patch for brassicas all limed and root crop area dug over wth added sand for carrots,,spuds given lots manure,,this place be like a jungle ,,haha,,,yeah ok,,,


Hi Simmo  have you tried putting a piece of rhubarb under your brassica plants,  about two inches long,pointing up.  this method was given to me by my father.   i have had agreat deal of sucess, but it does not work on all soils.   best of luck  Wuz  

I read about planting carrots between rows of onion and garlic and it worked - no carrot fly - where as the allotments around me suffered

I have also been told that you can hoe carrots up but not tried this

I was told by a very respected gardener to water drills for carrots with a solution of 1 gallon of water and 1 capful of household liquid bleach .Soak the drill then sow seed. It does help reduce any "fly" lurking in the soil.
I also cover crop with enviromesh.
I have a bad infestation of carrot fly larvae in my garden, how can I treat the soil to get rid of them, so that I can grow veg next season. I realise it is a good idea to avoid the carrot family next season.

Morning Amateur  veg grower.

as soon as germinating takes place and whilst plants are small water with nematodes.  Then cover with fleece.  The former controls carrot fly larvae.  The latter prevents the adult flies from laying their eggs.  This breaks the cycle.  

Not sure about bleach Phillip