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Whitetop or Cardaria (Lepidium) draba!
On 02/07/2012 18:14, Spider wrote:
On 02/07/2012 17:58, Sacha wrote: On 2012-07-02 17:49:46 +0100, Stewart Robert Hinsley said: In message , Jake writes On Mon, 02 Jul 2012 14:39:27 +0100, Spider wrote: This is, I believe, the identity of the weed which perniciously invades part of my garden. http://en.wikipedia.org/wiki/Whitetop http://www.unce.unr.edu/programs/sites/tallwhitetop/ http://jennwarren.hubpages.com/hub/C...oxious-Weeds-I n-Your-Lawn-and-Garden Sorry for all the links, but this weed has been the bane of my life for 30 years. I *may* be just starting to see its grip loosening. I've even risked planting that part of my garden again (except for one corner). Previously, I've never dared move a wanted plant from that area of the garden to another for fear of spreading it. I dream of the day I never see another leafy spring rosette. Pedipalps crossed. Oh dear. TBH, I've never heard of this weed being found in the UK before. I must lead a very sheltered life. There's a largish colony by a canal bank a couple of miles away from me, but it's scarce of much of the country. It tends to be southeastern and coastal. Cheers, Jake ======================================= Urgling from the East End of Swansea Bay. We don't yet have a "dah dah dah dah dee dee deeee" theme tune but we're working on it. There are a couple of recorded sites at the east end of Swansea Bay, but there could be less than 50 sites in the whole of Wales. It would appear that Spider has a rarity and should now go into high reverse with eradicating it!! I've never seen it before and thought it looked quite attractive... You wouldn't think that if you'd lived with it for 30 years! It is only pretty when in flower, and that is when it is most dangerous. Although most of those links suggest hoeing is *eventually* effective, I haven't dared take a hoe to it for fear of chopping up the root and spreading it. We also had Japanese Knotweed when we moved in. I managed to eradicate that (although I note it's approaching again from a rear 'garden'), but Whitetop is horrendous. Don't wish for it. There are plenty of other white flowers .. Ground Elder, for instance ;~)). Herbicide Rate Timing Comments 2,4-D LV ester or amine 2-3 lb ae/A Early bud Noncrop treatment 1 lb ae/A Apply in wheat prior to boot stage Avoid drift to sensitive crops MCPA 1-2 lb ae/A Early bud Range and pasture broadleaf weed treatment Dicamba + 2,4-D 0.5 lb ae/A + 1.36 lb ae/A Bolting to early bud stage Range and pasture; do not apply when grasses are in the boot stage Chlorsulfuron 0.37-0.75 oz ai/A Prebloom or to fall rosettes Nonselective treatment Always use a surfactant Sulfometuron 0.14-0.23 lb ai/A Prebloom or to fall rosettes Noncrop, roadside treatment Glyphosate 3 lb ae/A Early bud Nonselective treatment Glyphosate 2% v/v Early bud Nonselective spot treatment |