Dear Prof Barbara,

Thank you for these explanations. It means when planting something we have to know reactions of all vegetables.

But what about using medicinal plants extracts to test their effects on vegetables??

Here is a link to a journal exclusively devoted to allelopathy. The website also provides links to books on allelopathy.

Allelopathic effects can be observed within and between plant species. I am attaching my publication on wheat.

http://www.allelopathyjournal.org/

Many thanks for your helpful informations Prof Barbara and Prof Rajeswara.