ASSESSMENT OF WEIGHT LOSS OF ONION IN STORAGE DUE TO FUNGI

M Ahsanuzzaman, M M Sarker, R Hasan, A Muqit and M A U Doullah
Journal of the Sylhet Agricultural University, Volume 4, Issue 1, 2017, Pages 95-100

Abstract:

The experiment was conducted to assess weight loss of onion bulbs in storage due to fungi in the laboratory of the Department of Plant Pathology and Seed Science, Sylhet Agricultural University, Sylhet. A total of six onion entries where four Indian viz., Accession 1, Accession 2, Accession 3 and Pusa red, and two deshi viz. Faridpuri and Zitka were tested. The experiment was arranged in a Randomized Complete Block Design (RCBD) with three replications. Fungal disease development on stored onion bulbs was observed at 45 days of storage (DOS). Three important storage fungi namely Aspergillus niger, Penicillium spp. and Fusarium oxysporum were found to be predominant that caused black mould, blue mould and Fusarium bulb rot disease, respectively. All entries were found to be susceptible to the storage fungi. The lowest disease incidence was found in Zitka variety (10.34%) whereas the highest was in Pusa red (26.57%) variety. Black mould disease showed the highest disease incidence among the three diseases. Percent weight loss was recorded three times with 15 days interval of DOS. Weight losses of all entries were significantly different at 15 days of interval in storage condition. Pusa red variety showed the highest (35.7%) weight loss at 45 days of storage where the lowest (8.7%) was recorded in Zitka. All Indian entries showed higher weight loss compared to deshi entries. Significant and positive correlation was found (r = 0.885*) between disease incidence and weight loss.

Keywords:

Allium cepa, storage fungi, disease incidence, weight loss, onion.


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M Ahsanuzzaman, M M Sarker, R Hasan, A Muqit and M A U Doullah. 2017. ASSESSMENT OF WEIGHT LOSS OF ONION IN STORAGE DUE TO FUNGI, Journal of the Sylhet Agricultural University 4(1): 95-100.