This review deals with the mechanism of antagonistic action of bacterial and fungal biocontrol agents such as the production of antibiotics, siderophores, enzyme secretion, competition for nutrition, plant growth promotion by rhizosphere microorganism. The utilisation of synthetic pesticides has been the predominant control processor for diseases brought about by phytopathogenic microorganisms. Notwithstanding, their open and improper application in intensive agriculture has realised issues that have prompted ecological contamination, considerable residues in agricultural products and phytopathogen resistance. They are likewise disrupting the quantity of beneficial microorganism which is available in the soil and capable of expanding soil fertility. Along these lines, there is a need to look through the option of synthetic pesticides that are safe, environmental and monetarily feasible to confront this problem. Biocontrol agent’s utilisation is the best alternative method to control the different kinds of diseases, such as nematode infestation, fungal pathogen and bacterial pathogen. Nowadays, biocontrol agents assume a significant role in the field of agriculture. It is a financially savvy, environment-friendly and inhibits the advancement of pathogenic microorganism sustainably. This review emphasises the role of biocontrol agents against different pathogenic microorganisms and their significance potentiality to improve plant growth and enhance defence system of plants.

本文综述了细菌和真菌生物防治剂的拮抗作用机理，例如抗生素的生产，铁载体，酶的分泌，营养的竞争，根际微生物促进植物的生长。合成农药的使用一直是控制植物致病微生物所致疾病的主要控制手段。尽管如此，它们在集约化农业中的开放性和不当应用已经意识到了一些问题，这些问题促使了生态污染，农产品中大量残留物和植物病原体抗性。它们同样破坏了土壤中可用的并能够扩大土壤肥力的有益微生物的数量。根据这些思路，有必要仔细研究安全性高的合成农药的选择，在环境和金钱上都可以解决这个问题。利用生物防治剂是控制线虫侵染，真菌病原体和细菌病原体等各种疾病的最佳替代方法。如今，生物防治剂在农业领域发挥着重要作用。它在经济上是明智的，环境友好的，并且可持续地抑制病原微生物的发展。这篇综述强调了生物防治剂对不同病原微生物的作用及其在改善植物生长和增强植物防御系统方面的重要潜力。真菌病原体和细菌病原体。如今，生物防治剂在农业领域发挥着重要作用。它在经济上是明智的，环境友好的，并且可持续地抑制病原微生物的发展。这篇综述强调了生物防治剂对不同病原微生物的作用及其在改善植物生长和增强植物防御系统方面的重要潜力。真菌病原体和细菌病原体。如今，生物防治剂在农业领域发挥着重要作用。它在经济上是明智的，环境友好的，并且可持续地抑制病原微生物的发展。这篇综述强调了生物防治剂对不同病原微生物的作用及其在改善植物生长和增强植物防御系统方面的重要潜力。