Gitaitis R, MacDonald G, Torrance R, Hartley R, Sumner D R, Gay J D, Johnson W C
Department of Plant Pathology, University of Georgia, Tifton 31793.
Cooperative Extension Service, Rural Development Center, Tifton, GA 31794.
Plant Dis. 1998 Aug;82(8):935-938. doi: 10.1094/PDIS.1998.82.8.935.
A semiselective agar medium (T-5) was used to sample environment and plant material as a habitat for Pseudomonas viridiflava. Soil, irrigation water, soybean foliage, and foliage from various weeds in an onion-growing area were assayed over a 5-year period. P. viridiflava was recovered only as an epiphytic resident from weed species that included cutleaf evening primrose, dandelion, common fumitory, purple cudweed, spiny sowthistle, Virginia pepperweed, and wild radish. The bacterium apparently overseasons in association with these weeds, because its presence was detected prior to, as well as during, the onion-growing season. Preliminary tests indicated that weed control may suppress bacterial streak and bulb rot levels.
使用一种半选择性琼脂培养基（T-5）对环境和植物材料进行采样，以作为绿黄假单胞菌的栖息地。在5年的时间里，对洋葱种植区的土壤、灌溉水、大豆叶片以及各种杂草的叶片进行了检测。仅从包括剪叶月见草、蒲公英、普通烟堇、紫花鼠麴草、刺儿菜、北美独行菜和野萝卜等杂草物种中作为附生菌分离到了绿黄假单胞菌。该细菌显然与这些杂草一起越冬，因为在洋葱生长季节之前和期间都检测到了它的存在。初步试验表明，杂草控制可能会抑制细菌性条斑病和鳞茎腐烂的发生水平。
