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Animal and Plant Health Inspection Service
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Wild Solanaceous Hosts

Symptoms of Ralstonia Solanacearum on Wild Solanaceous Hosts


A common weed in many parts of the US is climbing nightshade, Solanum dulcamara. It is a symptomless host of  Ralstonia solanacearum that typically grows along water courses. [Photo Source: Leslie J. Mehrhoff, University of Connecticut, Bugwood.org]
Closeup of Solanum dulcamara's curved purple flowers with bright yellow stemens. On rare occasions, the flowers are white. [Photo Source: David Cappaert, Bugwood.org ]
In Europe, Solanum dulcamara is known as bittersweet, and is the main pathway for Ralstonia solanacearum race 3 biovar 2 infection from contaminated water courses into potato fields. [Photo Source: Leslie J. Mehrhoff, University of Connecticut, Bugwood.org]
Close up of a Solanum dulcamara stem with fruit. [Photo Source: Steve Dewey, Utah State University, Bugwood.org]
Solanum dulcamara grows in a wide range of habitats, from woodland to scrubland, hedges and wetlands, and is often found in close proximity to agricultural land.  [Photo Source: Ministry of Agricuilture and Rural Affairs, Bugwood.org]
The smaller leaves are oval shaped with a pointed tip and the larger leaves tend to have three lobes. [Photo Source: Steve Dewey, Utah State University, Bugwood.org]
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