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On 30 Jan 2005 20:19:24 GMT, (Nick Maclaren) wrote:
~In article , ~jane wrote: ~ ~This is actually rather more worrying. If the central composting plant ~cannot get to high temperatures, how on earth are they going to ~prevent the resulting compost spreading somebody's dumped Japanese ~Knotweed or horsetail all over Wales??? ~ ~Urk. South Welsh gardeners may be wise to avoid buying the resulting ~compost! ~ ~Well, they may be, but not for that reason. Such roots don't last ~long even in a 'cold' composting process, because they have to either ~grow or die - and there isn't enough light (and often not enough air) ~to grow. Also, when they do sprout, the new growth is very susceptible ~to attack by bacteria and fungi. er, I think it *can* survive http://www.compost.me.uk/html/japanese_knotweed.html "The results of the study suggest that for regeneration to be prevented a temperature greater than 55oC needs to be maintained in the compost, for at least one week." So I guess the question is how hot does it actually get? ~The danger comes from bacteria, fungi etc. with resistant spores, such ~as tetanus or anthrax (neither currently a major problem in the UK), ~and possibly things like white rot of alliums. I don't know which ~plant pathogens have resistant spores, but it is fewer than most people ~think. mmm I'd hate to acquire white rot or anything else for that matter via poorly made compost. I could do right now with about a ton of topsoil for my new lottie raised beds but not till I find a reputable supplier for that and the organic matter it will no doubt need mixing with. Ah, the joys of organic veggie gardening! -- jane Don't part with your illusions. When they are gone, you may still exist but you have ceased to live. Mark Twain Please remove onmaps from replies, thanks! |
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