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PL PATH 519 POST HARVEST DISEASES                                                                                 (2L+1P) III

Objective
To provide knowledge on post harvest diseases, factors governing post harvest problems, stages of diseases development, integrated approach in disease management and quality control

Theory

UNIT I
Concept of post harvest diseases, definitions, importance with reference to environment and health, principles of plant disease management as preharvest and post-harvest, merits and demerits of biological/phytoextracts in controlling post-harvest diseases.

UNIT II
Types of post harvest problems both by biotic and abiotic causes, rhizosphere colonization, competitive, saprophytic ability, antibiosis, induced resistance, microbial associations, concept, operational mechanisms and its relevance in control.

UNIT III
Factors governing post harvest problems both as biotic and abiotic, role of physical environment, agro-ecocystem leading to quiescent infection, operational mechanisms and cultural practices in perpetuation of pathogens, pathogens and antagonist and their relationship, role of biocontrol agents and chemicals in controlling post-harvest diseases, comparative approaches to control of plant pathogens by resident and introduced antagonists. Isolation, characterization and maintenance of pathogens, role of different storage.

UNIT IV
Integrated approach in controlling diseases and improving the shelf life of produce, control of aflatoxigenic and mycotoxigenic fungi, application and monitoring for any health hazard, knowledge of Codex Alimentarious for each product and commodity.

Practicals
Isolation characterization and maintenance of pathogens, role of different storage conditions on disease development, application of antagonists against pathogens in vivo and in vitro conditions. Comparative efficacy of different chemicals, fungicides, phytoextracts and bioagents.

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