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Discussion on the nature and biological activities of both biotic and abiotic bioagents is presented with large number of illustrations only in this book, providing a significant benefit and opportunity to the audience to have complete information from a single source
Various mechanisms of biological activities of biotic and abiotic biocontrol agents are critically discussed highlighting the similarities in their mechanisms and indicating the possibilities of selecting the compatible ones to enhance the effectiveness of biological control against the targeted microbial pathogen(s) causing different diseases
Presentation of several protocols for carrying out various experiments and the list of general and specific media for isolation of biotic biocontrol agents is yet another attempt to make the book to be more useful to the readers who cannot find this aspect in any other book
With growing concern for environmental pollution and presence of chemical residues in grains, vegetables, fruits and other food materials, biological disease management tactics have emerged as potential alternative to chemical application for containing crop diseases. Biological control agents (BCAs) – biotic and abiotic agents – have been demonstrated to be effective against diseases caused by microbial plant pathogens. Biological management of diseases of crops involves utilization of biotic and abiotic agents that act through one or more mechanisms to reduce the potential of the pathogen directly or indirectly by activating the host defense systems to reduce the disease incidence and/or intensity. Biotic biological control agents include living oomycetes, fungi, bacteria and viruses that have inhibitory effects on the microbial pathogens through various mechanisms of action such as antagonism, competition for nutrients and niches, prevention of colonization of host tissues by the pathogen and induction resistance in plants against the diseases. It is essential to assay the biocontrol potential of all species/isolates of fungal, bacterial and viral BCAs in in vitro, greenhouse, and under field and storage conditions, in addition to their precise identification by biological, immunological and nucleic acid-based assays. Abiotic biological control agents include solarization, physical and chemical agents and those derived from diverse organic and inorganic sources. Organic amendments such as composts, green manures, vegetable wastes, plant extracts and secondary metabolites like essential oils have been shown to have high level of disease-suppressive activity. Chitosan derived from the crab shell, synthetic organic compounds such as SA, ASM, BTH and BABA have been used for treating seeds and plants. Combination of biotic and abiotic agents leads to synergism and consequent improvement in the effectiveness of disease control. Some of the biotic abiotic agents have provided effective disease suppression, when tested under in vitro and field and storage conditions. Protocols for isolation, identification and assessing the biocontrol activities of biotic and abiotic biocontrol agents provided in relevant chapters will be useful for researchers and teachers.
Content Level »Research
Keywords »Biological disease suppression - Characteristics of biological control agents - Compatibility of biocontrol agents - Detection of biotic biological control agents - Mechanisms of biological control activities
1. Introduction 1.1 Concepts and aims of biological management of crop diseases 1.2 Landmarks in the development of biological disease management systems 1.3 Nature and characteristics of biological control agents
2. Detection and identification of fungal biological control agents 2.1Methods of detection and identification 2.2 Assessment of biocontrol potential of fungi 2.3 Identification and differentiation of mycorrhizal biological control agents
3. Mechanisms of action of fungal biological control agents 3.1 Types of antagonism
4. Detection and identification of bacterial biological control agents 4.1 Methods of detection and identification 4.2 Assessment of biocontrol potential of bacteria
5. Mechanisms of action of bacterial biological control agents 5.1 Types of antagonism
6. Detection and identification of viral biological control agents 6.1 Viruses pathogenic to fungal plant pathogens 6.2 Viruses pathogenic to bacterial plant pathogens 6.3 Mild strains of plant viruses as biocontrol agents 6.4 Subviral agents as biological disease management
7. Genetic engineering for improving the performance of biotic biological control agents 7.1 Fungal biocontrol agents 7.2 Bacterial biological control agents 7.3 Genetically modified strains of plant viruses 7.4 Protection by antibody expression
8. Abiotic biological control agents for crop disease management 8.1 Natural products of plant and animal origin 8.2 Synthetic organic compounds as biological control agents 8.3 Inorganic compounds as biological control agents
Distribution rights for India: Researchco Book Centre, New Delhi, India