Allelopathy for sustainable weed management

Allelopathy is biochemical interaction among plants, stimulatory as well as inhibitory. Allelochemicals released by crop plants are the subset of secondary metabolites not required for metabolism (growth and development) of the allelopathic organism. These enter the environment from plants in a number of ways, such as plant degradation, volatilization, leaching from plant leaves, and from root exudation. Allelopathy in the crop lands bears a great significance. The allelopathic effects of the crops can be summarized as follows: (a) It affects the growth, productivity and yield of other crops, (b) It may affect the same crop growing in monocultures or grown in succession, (c) Crop allelopathy can be exploited selectively to suppress the weeds through various manipulations.

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