Allelopathy and list of compounds

I just did a search of this site and found 0 results for allelopathic and allelopathy. I am grievously disappointed in all of you for not ever mentioning these words. I know I have mentioned it before but I must have miss spelled it. I'm sure that I've heard other people talking about allelopathic compounds on here. I think Paul Wheaton referred to the compound/s in Knapp weed as plant guck.

Anyway I invite all of you to compile two lists of plants and preferably specific names of allelopathic compounds found in them. I will now start 2 new topics called

Positive allelopathy & Negative allelopathy

Please do your research and make a contribution to the lists.

P.S. If your doing polyculture and you don't know about allelopathy than you are really acting blindly and alot of your planning may be in vain.

I am very interested in this subject as well and look forward to other peoples' responses. Here are some plant databases that may prove helpful in this regard:

http://www.ibiblio.org/pfaf/D_search.html

http://www.ars-grin.gov/duke/plants.html

http://www.hort.purdue.edu/newcrop/default.html

Hope these help. Thanks for starting this thread.

So much true!

Many here, and elsewhere, are actually doing polycultures in a blind way, myself included.

I do not know anything about allelopathy from my own experience.

I sometimes see roots of different species growing together: that seems a good sign if upper growth is increased. But if a plant is stunted in presence of another, then we might have negative allelopathy. It has a lot to do with the soil, soil microorganisms and soil chemistry, both nutrients and chemicals released by the roots.

I always grow vegetables next to fennel, without trouble. But sometimes I see stunted plants elsewhere and I do not know why. Some species should be causing negative allelopathy.

One species I know that creates negative allelopathy by my own experience is eucalyptus globulus. Little seems to grow underneath and if you try to plant most species, then will by unhappy. This is not a claim, it is my own empirical observation. And it is these observations that are true knowledge, not just the many claims of companion planting foudn on the internet.

It seems easier to see allelopathy when plants are grown together in containers.
In my own experience, tomatoes and tiger nuts for example seem to create negative allelopathy in other growing plants. However this is a suspicion I have (therefore it is a claim), because I have not grown enough of the same combination to be fully confident to state that those species are indeed allelopathic.

Jeffrey Hodgins wrote:I just did a search of this site and found 0 results for allelopathic and allelopathy. I am grievously disappointed in all of you for not ever mentioning these words. I know I have mentioned it before but I must have miss spelled it. I'm sure that I've heard other people talking about allelopathic compounds on here. I think Paul Wheaton referred to the compound/s in Knapp weed as plant guck.

Anyway I invite all of you to compile two lists of plants and preferably specific names of allelopathic compounds found in them. I will now start 2 new topics called

Positive allelopathy & Negative allelopathy

Please do your research and make a contribution to the lists.

P.S. If your doing polyculture and you don't know about allelopathy than you are really acting blindly and alot of your planning may be in vain.

Here not so in depth page about allelopathy.
http://books.google.ca/books?id=ah1KVBTAFmIC&pg=PA52&lpg=PA52&dq=lavender+allelopathy&source=bl&ots=k8tuSCx4Ch&sig=c6TLA3QaDQFNySxVdmT5fTHv7qY&hl=en&sa=X&ei=Dd-WUdPFF8HB4AO1toGgBQ&sqi=2&ved=0CDEQ6AEwAg#v=onepage&q=lavender%20allelopathy&f=false

Ecological Effects of Allelopathy

http://www2.dmu.dk/1_Viden/2_Publikationer/3_Fagrapporter/rapporter/fr315.pdf

From the Australian Society of Agronomy

http://www.regional.org.au/au/asa/1998/6/314an.htm

And a rather thick one...

http://books.google.com/books?hl=en&lr=&id=5-3AEm2erJIC&oi=fnd&pg=PR11&dq=list+of+allelopathic+plants&ots=mMueZD3n7W&sig=Bs9XWVcWPEEdpuk2HQLXK3xS-xY#v=onepage&q=list%20of%20allelopathic%20plants&f=false

Hope these help.