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A biological phenomenon in him which one organism produces secondary metabolites that have either beneficial (positive) allelopathy or detrimental (negative) allelopathy on target organisms.

Examples of organisms displaying allelopathy
Plants, algae, bacteria, coral and fungi. These interactions influence species distribution and abundance within plant communities and ecosystems.

allelopathy (l·lēˑ·l·pa·thē),

n the system of natural defenses that protects one plant species from others around it.
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References in periodicals archive ?
In a majority of cases, allelopathy refers to the negative and/or harmful effects on isolated species, populations or even surrounding communities.
Waller GR Introduction- reality and future of Allelopathy.
2000), temporal phenomena (Leach and Givnish, 1999), decreased levels of surface light, changes in soil moisture, deeper litter, allelopathy, or a combination of these factors (Bates et al.
The allelopathy of the weeds is one of the most studied aspects in the last 30 years, mainly due to the losses in productivity that these plants may cause to crops.
Allelopathy is a promising field of study that deals with natural reactions between plants to aid in weed control.
Sudex cover crops can kill and stunt subsequent tomato, lettuce and broccoli transplants through allelopathy.
Ailanthus altissima, Allelopathy, and Nitrogen Fixation in Legumes: How One Invasive Species is Potentially Securing Its Success.
The study is believed to be the first to report the effects of UV-B radiation on plant allelopathy, the production of toxins by a plant to ward off encroachment by neighboring plants.
Proc 1st Nat Symp Allelopathy in agroecosystems (agriculture and forestry).
They introduce a dozen chapters by international scientists reviewing principles and findings on the latest preventive and treatment strategies including cultural practices such as crop rotation, and allelopathy (the use of cover crops that suppress weeds); other biological controls; non-living mulches; mechanical control; thermal control; and soil solarization.
Evidence for allelopathy by tree-of-heaven (Ailanthus altissima).