Kulkarni, SrikantKota, Venkata Ramesh2019-08-162019-08-162003No. of references144http://krishikosh.egranth.ac.in/handle/1/5810121907Investigations were carried out oie poarvest diseases of mango, citrus, banana, grapes and pomegraitalTrfor developing biological control methods of managing them. In mango, anthracnose, stem end rot, Aspergillus rot and Rhizopus rot were observed. Anthracnose, crown rot, finger rot, black tip disease were commonly observed in banana. Postharvest diseases observed in citrus are anthracnose, black core rot, stem end rot, Fusarium rot, Aspergillus rot and sour rot. Major postharvest diseases of pomegranate observed were Aspergillus rot, Penicillium rot and Colletotrichum rot. In grapes, Aspergillus rot and Rhizopus rot were frequently observed. [in vitro evaluation of plant extracts against postharvest pathogens revealed that 10% chromolaena leaf extract and garlic bulb extract were effective in inhibiting the mycelial growth and spore germination of Altemaria a/temata. Garlic bulb extract at 10% was most effective in inhibiting the mycelial growth and spore germination of Aspergillus niger. Mycelial growth and spore germination of Botryodiploidia theobromae was inhibited maximum by 10% garlic bulb extract and neem leaf extract. Mycelial growth and spore germination of Colletolrichum gloeosporioides was most inhibited by 10% garlic bulb extract. Neem leaf extract and garlic bulb extracts were also effective in inhibiting the mycelial growth and spore germination of Colletotrichum musae. Tulsi leaf extract and neem leaf extract were effective against Fusarium moniliforme. Among the different biocontrol agents tested in vitro, Trichoderma harzianum was most effective against A. altemata. Bacillus subtilis and T. harzianum were effective against A. niger. Against C. gloeosporioides, B. subtilis and Pseudomonas fluorescens were found to be effective. C. musae was inhibited to maximum extent by B. subtilis, P. fluorescens and T. viride. T. viride and T. virens (isolate 2) were effective against B. theobromae. F. moniliforme was most inhibited by B. subtilis and T. harzianum. In vivo evaluation of biocontrol agents and plant extracts against posthai'vest diseases of mango revealed that T. viride spore suspension and garlic bulb extract were effective in reducing the per cent disease index. Neem leaf extract and T. viride spore suspension were effective in reducing the Aspergillus rot of pomegranate. Botryodiplodia rot of citrus was effectively reduced by B. subtilis and garlic bulb extract. Garlic bulb extract and neem leaf extract were most effective in restricting the spread of crown rot of banana.ennullThesis