Effect of Natural Infection with Onion Yellow Dwarf Virus （OYDV） on Yield of Onion and Garlic Crops in Egypt
Effect of Natural Infection with Onion Yellow Dwarf Virus （OYDV） on Yield of Onion and Garlic Crops in Egypt作者机构：Department of Economic Entomology and Pesticides Faculty of Agriculture Cairo University Cairo 12613 Egypt
出 版 物：《Journal of Life Sciences》 (生命科学（英文版）)
年 卷 期：2011年第5卷第8期
页 面：634-638页
学科分类：090603[农学-临床兽医学] 09[农学] 0906[农学-兽医学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
主 题：Onion yellow dwarf virus (OYDV) yield reduction onion garlic.
摘 要：Present work highlights, first time in Egypt, the impact of OYDV infection on crops production. Plants grown in the field were individually labelled as either apparently healthy or diseased and were marked for harvesting. The percentage of yield loss due to viral infection was determined, on the basis of the average yield parameters of the healthy plant. The natural infection with OYDV in onion and garlic fields resulted in a substantial reduction in pseudo-stem length, number of leaves, plant weight and weight of bulb as well as number and weight of cloves. Results clearly indicate the impact of natural infection with OYDV on the crop yield of infected onion and garlic plants in comparison with the virus-free （uninfected） ones. The largest reduction in the yield of infected plants occurred in Chinese garlic （Seds40） followed by （Baladi） garlic and onion Giza 20. This information suggests that measures have to be taken to prevent natural infection with OYDV into and within onion and garlic fields in order to avoid yield loss.
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