Allelopathic activity of Cyanobacteria has attracted the attention of researchers. A deep understanding of allelopathy can answer the successions of cyanobacteria in natural habitat.There is a global concern regarding increased harmful algal blooms and allelopathy can be a possible factor in the dominance of toxin-production by cyanobacteria. Cyanobacteria are producers of diverse range of allelochemicals. The active compounds are seen as environment-friendly herbicides or biocontrol agents that might have a potential commercial significance. Allelopathy is an unique adaptation to...