Sporulation on infected tissues, and prence of airborne Verticillium albo‐atrum in alfalfa fields in
New York
苹果定位
期刊名称： Plant Pathology
不苟言笑的意思作者： R. M. JIMéNEZ DíAZ,R. L. MILLAR归脾丸的作用>人际关系自我评价
作者机构： Department of Plant Pathology, Cornell University, Ithaca, NY 14853, USA花木兰是什么朝代
年份： 2010年春季菜
期号： 第1期
关键词： epidemiology, pathogenicity, ed-borne fungi, wilts, Verticillium,高一上册数学
Medicago sativa, airborne infection, sporulation
摘要：The phenology of Verticillium albo-atrum ( Vaa) sporulation on infected tissues and the prence
of Vaa in the air were investigated in alfalfa fields affected by verticillium wilt (VW) during the 1983/84 growing ason. Few and scattered Verticillium conidiophores developed on stubble by the end of May, but abundant Verticillium sporulation was found on necrotic leaflets and petioles by the beginning of June at the first appearance of symptoms. Abundant conidiophores developed also on necrotic stems and leaf tissues sampled later. Sporulation was never found on entirely green stems. Concentration of airborne colony-forming units (cfu) of Vaa ranged from 0.0 to 15.3 cfu/m 3 above fields with a VW incidence
苏联时期
of 2.2-33.0% in June and August, and from 5.9-25.9 cfu/m 3 during mowing of the crop in August. The ratio of Vaa to
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