Effect of some agricultural and storage practices on garlic bulbs rot diseases [electronic resource].

Includes references.

Black, green and basal rot diseases were the most dominant diseases on garlic bulb during storage. These diseases caused by Aspergillus niger, A. jlavus, Penicillium spp. and Fusarium oxysporum that proved to be the most frequent fungi. These fungi were found to be responsible for causing deleterious influence on the stored garlic bulbs either on Balady or Chinese cultivars. Harvesting garlic bulbs after 190 days from planting resulted in a great reduction in bulb rot incidence than that harvested after 150 days. Storing at temperature ranging between 20 - 30°C resulted in the highest values of infection. Percentage of infection and bulbs rot increased with increasing storage period. Also, the deleterious effect of rot disease increased as number of irrigation of the crop was increased. Increasing level of nitrogen fertilizer increased the garlic bulb rot disease incidence. However, the disease decreased with the raise of potassium and phosphorus rates in the tested growing seasons (1999/ 2000 and 2000/2001). Vitavax-Thiram was the most effective fungicide against infection during storage when applied in the field. Drying storage bulbs without neck topping for two weeks was more beneficial in reducing infection. Packing garlic bulbs before storing in perforated paper bag andl or carton boxes resulted in the least bulb damage in comparison with the other packing materials

Summary in Arabic.

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