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pre-emergent for weeds
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Posted by weeddummie ACT (My Page) on Mon, Sep 5, 05 at 2:53
| Dear garden webbers,
I did a search to find no topic on this yet...or did I miss it?
Anyway, in the other gardenweb forums I learnt about something called Preen (brand name) preemergent chemicals for preventing weeds from sprouting. I have not seen this before, and was wondering there're people using it here? What other brands are there? What kind of ingredients are they?...anything organic that will do the trick? I realised that roundup is only effective once the weeds have grown. This concept of preemergents is interesting if it really works.
I have a dirt/gravel path in my frontyard where the car parks. It's growing with weeds of all sorts, whereas dirt road areas in public parts/kerbs seem to stay clean like magic. What kind of chemicals/action does the public parks staff use, I wonder...?
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Follow-Up Postings:
RE: pre-emergent for weeds
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I don't think it is available here. Preen is a carbamate herbicide I believe. This group of chemicals inhibit cell division hence its use as a pre-emergent herbicide. Chloro IPC is another carbamate which is available here (in big packs) to onion growers. It is also sold as 'Stop Sprout' which is used to stop the sprouting of potatoes.
You need a residual chemical for your path - may be called 'Path Weeder' or the like. It may contain amitrole or simazine or DPA (di chloro propionic acid) But remember that this product type will kill everything and keep on doing so for a long time and may transport through the soil profile to desirable plants which it will kill. |
RE: pre-emergent for weeds
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| It's common in the US? The whole idea of it does my head in but that's just my opinion. The western side of my yard between house and fence has this gravelly surface and it's a total pain but regular weeding keeps it clear. |
RE: pre-emergent for weeds
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- Posted by Liatris FraserCoast,Qld (My Page) on
Mon, Sep 5, 05 at 16:07
| Once you have it weed-free, it's not really a huge task to keep it that way, unless you have a really long driveway. If you want to go the lazy way, once-a-year path weeder will do the job for you. >anything organic that will do the trick? Boiling water poured onto the weeds will kill them. Once you have your gravel driveway weedfree, any weeds that pop their heads up can simply be smothered with a bit more gravel, and will eventually give up. |
RE: pre-emergent for weeds
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| I don't really like the idea of putting long term chemicals in the soil anyway - so I need to re-strategise. I do use boiling water (But I have a small 1L kettle:) - how else do others do this?). I actually also have moss (or this dark green specks appearing around that I think are moss) in the area, and wasn't sure how to tackle them. Another site mentioned something about using corn gluten meal(are there other names for it in australia?) as a preemergent - not entirely sure though. Has anyone used this before? I have a medium sized driveway - for two cars say. Weeds are appearing mostly on the sides right now. If I go about pouring boiling water on a small area at a time...will it work? I should have prevented them when they were small the first place :( At least I don't have knotweed here as I've removed most of them before. It's the greener leafy bits flourishing there right now. |
RE: pre-emergent for weeds
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Corn gluten spray is supposed to act as a pre-emergent though I've never tried it. You could do a Google search to find out more about it.
Just out of interest, toxicity studies on one type of pre-emergent, sulfentrazone, has shown foetal toxicity (birth abnormalities) even though the dose was not toxic to the mother. |
RE: pre-emergent for weeds
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| I did a quick search to find only research related material (people's thesis say) on organic preemergents in australia. And, the such products are currently only available in the US. Interesting though! I'll go start the kettle boiling now... :) |
RE: pre-emergent for weeds
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| I saw an ad in a gardening magazine a while ago about a blowtorch-type weeder. If I remember right, it was a tube with a small gas? bottle at the top and you light the other end like a blow torch and you just walk around and burn the weeds. Maybe someone else has seen or tried these? |
RE: pre-emergent for weeds
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| Try Sierraron by Scotts,its a commercial product but your local produce supplier should be able to get it for you.It is extremely effective as a path weeder. |
RE: pre-emergent for weeds
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| Regarding Sierraron, the AI is dichlobenil which is also marketed as Casoran G. Unfortunately it is registered for commercial use only and not domestic and is very expensive so legally and costwise this may not be an option. |
RE: pre-emergent for weeds
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- Posted by Liatris FraserCoast,Qld (My Page) on
Tue, Sep 6, 05 at 15:49
| The moss is an indication that the drainage is not good in the area, though if it's a driveway and doesn't form puddles, this is not likely to be a huge problem, though if the surrounding area is the same it might need to be addressed. I always just made the assumption that corn gluten meal was simply corn flour, though I may be wrong. |
RE: pre-emergent for weeds
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| does roundup or boiling water kill moss? I'm not 100% sure if it's moss, or what kind of moss it really is though. I guess prevention is better, if I can get the numbers down then it's easy to destroy the few before they spread. Haven't seen blow torch weeders so far, but it might be easier than spraying roundup manually til my hands hurt :) Corn meal is different from corn flour, but as for corn gluten meal...I'm not sure either. It's doesn't sound like we can just pour the flour on the driveway though...the products around are utilising one of the byproducts of corn gluten meal...I suppose it's further processed or something. |
RE: pre-emergent for weeds
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- Posted by pos02 NSW Aust (My Page) on
Tue, Sep 6, 05 at 22:06
| It probably comes down to how thick the road base is. I would say that public car parks which use gravel have quite a thick layer of road base beneath the gravel. You may have to look into this if it is going to be a major problem. |
RE: pre-emergent for weeds
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| Iron sulfate from a watering can will kill moss effectively. |
RE: pre-emergent for weeds
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| We use corn gluten meal from the Gardens Alive company on our lawn, and it seems to do a good job of organic pre-emergent weed control. They sell it under the name "WOW" (WithOut Weeds or something like that). |
RE: pre-emergent for weeds
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| g'day weddummie, i find the best pre-emergant is mulch, and it control moisture loss keeps the soil insulated cool when i should warm when it should and if you use green mulches you provide nutrients as well, too easy hey? len |
Here is a link that might be useful: lens garden page
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