Post a reply

Image
Feb 17, 2014 3:26 PM CST
Thread OP
Name: Charlie Treher

I have an excess of "tree of heaven" on my property. It took possession before I knew what it was. I understand it has very strong allelopathic effect. My question to you is have you ever used any strong allelopathic wood or plants in your hugelkultur beds and if so, did they cause a problem. I'm not sure once cut and dried for a year or so that the chemical effect would still cause a problem. If not, I would have plenty to start many hugelkultur beds.

Thank you.
Image
Feb 17, 2014 4:32 PM CST
Garden.org Admin
Name: Dave Whitinger
Southlake, Texas (Zone 8a)
Region: Texas Seed Starter Vegetable Grower Tomato Heads Vermiculture Garden Research Contributor
Million Pollinator Garden Challenge Charter ATP Member I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level Region: Ukraine Garden Sages
I've never used allelopathic woods in my hugelkultur beds and I would have serious reservations about doing so, even if the wood was very old. Considering how long of a timeframe one is looking at in a hugelkultur bed, it just doesn't seem worth the risk to me.
Avatar for Coppice
Feb 20, 2014 9:59 AM CST
Name: Tom Cagle
SE-OH (Zone 6a)
Old, fat, and gardening in OH
The wood isn't going anywhere, nor are you. Create a test bed with alopathic wood and test fire it for a couple years.
Image
Feb 20, 2014 6:06 PM CST
Thread OP
Name: Charlie Treher

Thanks for your suggestions. Yes, perhaps I will do a test bed and put some native wild flowers in the bed.
Avatar for anazoh
Dec 7, 2015 10:16 PM CST

Hello, i really need some help here, i want to ask question regarding allelopathy, so i've done experiment on Chromolaena odorata leaves extract, and i've tested it on the the germination of Amaranthus tricolor seeds. However, problem is my result shows that, 10.0% concentration of leaves extract application shows better result in seed germination compared to 7.5% extract of leaves. can someone explain this to me please, i'm really desperate to know.
Image
Dec 7, 2015 10:48 PM CST
Name: greene
Savannah, GA (Sunset 28) (Zone 8b)
I have no use for internet bullies!
Avid Green Pages Reviewer Keeper of Poultry Vegetable Grower Rabbit Keeper Frugal Gardener Garden Ideas: Master Level
Plant Identifier Region: Georgia Native Plants and Wildflowers Composter Garden Sages Bookworm
@anazoh, Welcome! Welcome to ATP.

Whew, that's a complicated question. Blinking
I did a quick Google search and found several articles like this one which may help to explain:
http://www.idosi.org/ajps/5(4)...

Here is another one:
http://www.regional.org.au/au/...
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"
Image
Dec 10, 2015 10:42 AM CST
Name: woofie
NE WA (Zone 5a)
Charter ATP Member Garden Procrastinator Greenhouse Dragonflies Plays in the sandbox I was one of the first 300 contributors to the plant database!
The WITWIT Badge I helped plan and beta test the plant database. Dog Lover Enjoys or suffers cold winters Container Gardener Seed Starter
@greene @anazoh That first link doesn't work if you just click on it. But it does work if you copy and paste it. (For some reason, the whole address isn't highlighted as a link.)
Confidence is that feeling you have right before you do something really stupid.
Image
Dec 11, 2015 5:47 AM CST
Name: Sue
Ontario, Canada (Zone 4b)
Annuals Native Plants and Wildflowers Keeps Horses Dog Lover Daylilies Region: Canadian
Butterflies Birds Enjoys or suffers cold winters Garden Sages Plant Identifier
anazoh said:Hello, i really need some help here, i want to ask question regarding allelopathy, so i've done experiment on Chromolaena odorata leaves extract, and i've tested it on the the germination of Amaranthus tricolor seeds. However, problem is my result shows that, 10.0% concentration of leaves extract application shows better result in seed germination compared to 7.5% extract of leaves. can someone explain this to me please, i'm really desperate to know.


Do you know for sure that Amaranthus is supposed to be susceptible to its allelopathic effects? If not then my first thought would be that it is not, same as not all plants are susceptible to the juglone from black walnut for example. In that case the explanation may be that there's something in it that stimulated the germination or it is coincidence. How many seeds were in the test batches? Did you have an untreated contol?

Edited to add - by coincidence I mean that the 10% versus 7.5% difference may be coincidence but that somewhat depends on how many germinated and how many seeds were started.

BTW I had trouble finding this question again, I think it was a separate thread originally unless I'm dreaming. When I came back to answer I finally found it tagged on to this thread. @anazoh welcome to ATP and I hope you find your way here.
Last edited by sooby Dec 11, 2015 7:20 AM Icon for preview
Avatar for anazoh
Jan 9, 2016 7:30 AM CST

Hey, thanks for the answer btw, yeah, i've only have time replaying to this post now, i'm sorry. I think it's supposed to be susceptible as the 7.5% leaves extract of Chromolaena, do have very significant effects on the germination success of the seeds, where many are seems to not germinating. i do have control ( using distilled water). and i've tested 30 seeds in each treatment, with 3 replicates. Thanks for the warm welcome Smiling
Last edited by anazoh Jan 9, 2016 7:55 AM Icon for preview
Image
Jan 9, 2016 7:46 AM CST
Name: Sue
Ontario, Canada (Zone 4b)
Annuals Native Plants and Wildflowers Keeps Horses Dog Lover Daylilies Region: Canadian
Butterflies Birds Enjoys or suffers cold winters Garden Sages Plant Identifier
I found the same Australian link for research on the allelopathic effects of Chromolaena that Greene gave earlier in the thread, which says:

"Weed seed germination was inhibited by siam weed extract more than crop seed germination. Maize seed germination was not hindered by siam weed extract while on cowpea and soybean, 14 and 8 percent reduction in seed germination, respectively was recorded when compared with the untreated control. Percent reduction in germination in siam weed treated with the extract was 87 %, when compared with the untreated control . Siam weed extract had some inhibitory effect on soybean growth at the later stage of crop growth, while the growth of maize, cowpea, tridax and siam weed itself was stimulated by siam weed extract."

Allelopathic Effect of Siam Weed (Chromolaena odorata) on Seed Germination and Seedling Performance of Selected Crop and Weed Species

This confirms that not all seeds are affected by it, since corn (maize) was not.
Only the members of the Members group may reply to this thread.
  • Started by: pappyt
  • Replies: 9, views: 2,030
Member Login:

( No account? Join now! )

Today's site banner is by Zoia and is called "Purple Wedding"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.