Irrigation Water as a Source of Inoculum of Soft Rot Erwinias for Aerial Stem Rot of Potatoes

Abstract

Seed pieces from a single seed lot of potato cultivar Russet Burbank were diffusion. In Oregon, seven different serogroups were detected in irrigation planted at two production areas in Oregon and Colorado in 1985 and 1986. water first during the season, then on leaflets, and later in diseased stems. In Plots were established in fields irrigated from either surfaceor well-water Colorado, five different serogroups were detected in irrigation water before sources. Seed tubers, field soil, irrigation water, symptomless leaflets, and or at the same time they were detected on potato leaflets. However, only stems with aerial stem rot symptoms were assayed for the presence of soft one plant developed aerial stem rot symptoms. In Oregon, 39% of the rot erwinias. More than 95 and 90% of all strains recovered from Oregon serogroups identified were common to irrigation water, leaflets, and and Colorado sources, respectively, were Erwinia carotovora subsp. diseased stems, whereas in Colorado 50% of the serogroups identified were carotovora. A total of 3,556 strains of E. carotovora were tested common to irrigation water and leaflets. Contaminated water sources are a serologically against 21 different antisera by Ouchterlony agar double potential source of inoculum for aerial stem rot in Oregon.

Biochemical and genetical analysis reveal a new clade of biovar 3 Dickeya spp. strains isolated from potato in Europe

“…Surface water contaminated with Dickeya and Pectobacterium has been frequently found (Pérombelon andHyman 1987, Cappaert et al 1988;Persson 1991;Cother et al 1992;Norman et al 2003). It has been speculated that contaminated surface water can be a primary source of infection for clean potato stocks (Cappaert et al 1988;Laurila et al 2008).…”

Colonization Patterns of an mCherry-Tagged Pectobacterium carotovorum subsp. brasiliense Strain in Potato Plants

“…For example, aerial infection of potato plants via small airor waterborne (i.e., wind damage and irrigation water, respectively) SRE inoculum can also result in blackleg or aerial stem rots under wet conditions (5,25,35). Alternatively, aerial infections can occur as a result of animal and human activities or the use of mechanically contaminated machinery.…”

Characterization of Dickeya strains isolated from potato and river water samples in Finland

“…Dickeya strains have been isolated repeatedly from potatoes during recent decades and the disease has rapidly spread in western Europe during recent years (Hélias et al unpublished;Dupuis et al unpublished;Palacio-Bielsa et al 2006 and references therein). Dickeya strains have been isolated from river water in southern Sweden (Persson 1991) and also in many other countries Dickeya strains are common in rivers (Cappaert et al 1988;Cother et al 1992;Norman et al 2003).…”