Abstract
In Africa, yield loss and low income to farmers is exacerbated by pests and notorious weeds manifested in different cropping systems. The fact that crop species may be allelopathic to common weeds, pathogens and insect pests has attracted considerable attention as an alternative strategy for weed and pest management in small-scale and low-input mixed culture systems. The use of crop plants with greater allelochemical production could limit the need for agrochemicals and conventional herbicides for plant protection and defence. As a result, plant growth and grain yield will be increased, leading to greater profit margins for farmers. This review discusses the possible role(s) of allelopathy as a key player in protection, defence and growth stimulants in legume cereal intercropping systems.
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