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Subject: Seed Science and Technology × End date: 2018 × Start date: 2018 × Type: Thesis ×
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    ThesisItemOpen Access
    EFFECT OF DIFFERENT STORAGE STRUCTURES ON SEED BORNE DISEASES OF MAIZE
    (AAU, Jorhat, 2018) Terangpi, Hunmili; Borah, P K
    Maize cultivation in the world is limited by diseases which cause grain loss of about 11% of the total production. Fungi are among the principal causes of deterioration and loss of maize grain. Fungi could cause damage to farmers maize during the storage if conditions are favourable for their development. A systematic study on effects of different storage structures on seed borne diseases of maize during storage with special reference to Assam, (Karbi Anglong) was conducted, because of the prevailing climatic conditions has been identified to cause a problem in storage of maize. Maize seeds of different varieties (white, yellow and red colour maize) locally cultivated were collected from different farmers of Karbi Anglong district and brought to the NSP (Crops) laboratory for further study. The seeds were stored in four different storage structures viz., metallic bin, gunny bag, HDPE bag and without storage structures as cobs with husk, cobs without husk and as seeds. Ten treatments comprising 4 storage structures replicated thrice and laid out in Completely Randomized Design (CRD). Data on germination, root and shoot length, colony count (Percent frequency) were collected at 3 months interval up to 270 days. It was observed that the percent frequency of pathogens were found to increase with increase in storage period. Five number of fungal pathogens were isolated and identified such as Aspergillus flavus, Aspergillus niger, Fusariumsp, Curvulariasp, Colletotrichum sp before storage and during storage. The pathogenicity test conducted revealed that the highest rotting of seeds was showed by Aspergillus flavus. The study also revealed that germination percentage and seedling vigour was maximum in seeds stored in metallic bins as compared to other storage structures. The present study therefore recommends that to store seeds in healthy state and to prolong the enhanced seed viability, seeds be stored in metallic bins.