This site also contains allelopathic links. This site is posted by D.J. McPherson of the University of Florida. Allelopathy in citrus weed management is a topic here. The site is searchable and provides a wealth of information. This institute is based in the Philippines.
Site contains information on allelopathic effects that rice on aquatic weeds.
Abstracts of the reaseach being done around the world can be seen here. This page gives detail of the allelopathic potential of leaf decomposition. The seasonal allelopathic effects of leaf extracts on wheat germination and coleoptile length also discussed. The Dept. of Plant Sciences here conducted a study to establish the occurrence of allelopathic effects amoung submerged and floating hydrophytes. The study determines the intensity of allelopathy Allelochemicals as Substitutes Plants produce chemicals that directly or indirectly influence the environment.