**4. Conclusions**

Allelopathy is an important mechanism of plant interference mediated by the additional phytotoxins to the environment; chemicals with allelopathic potential are present in virtually all plants as in most tissues. Under appropriate conditions, these chemicals may be released into the environment, in sufficient quantities to affect neighboring plants allelopathy can affect many aspects of plant ecology, including growth, plant succession, the structure of plant communities, dominance, diversity, and plant productivity.
