technological know-how is largely a descriptive and experimental machine. It observes nature, constructs hypotheses, plans experiments and proposes theories. the speculation isn't reflected because the 'final truth', yet is still ever topic to differences, alterations and rejections. The technological know-how of allelopathy similarly has emerged, and exists on the same footing; our endeavour may be to maintain it clean and leading edge with addition of more recent in­ formation and ideas with the rejection of older rules and antiquated strategies. in past times few a long time encouraging effects were received in numerous elements of allelopathic researches. even if, as well as carrying on with efforts in these kinds of instructions, consistent makes an attempt are to be made to explain the mechanics of allelopathic job in molecular phrases and to find methods and potential to take advantage of it for the welfare of mankind. We suppose that multidisciplinary efforts are the single device to accomplish this target. it's the desire of the editors that this publication will function a record which identifies an built-in procedure, in which study either to appreciate and take advantage of allelopathy will be performed. the current quantity arose out of an try and assemble eminent scientists in allelopathy to explain their paintings, of a hugely various nature, lower than one title.