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Animal and Plant Health Inspection Service
U.S. Department of Agriculture
Symptoms of Ralstonia solanacearum race 3 biovar 2 seen on zonal geraniums, Pelargonium x hortorum, are wilting and yellowing.
Wilting Of Leaves
Early Wilting Symptoms. [Photo Source: Jean L. Williams-Woodward, University of Georgia, Bugwood.org]
More advance wilting and abnormal leaf yellowing symptoms, chlorosis. [Photo Source: The Wisconsin Department of Agriculture, Trade and Consumer Protection]
Group of geraniums showing wilting symptoms [Photo Source: USDA APHIS PPQ, Bugwood.org]
Wilting and mortality of Americana Cherry Rose variety. [Photo Source: USDA APHIS PPQ, Bugwood.org]
Wilting, chlorosis and necrosis due to Ralstonia solanacearum infection of geranium [Photo Source: USDA APHIS PPQ, Bugwood.org]
One plant has been killed by Ralstonia solanacearum and another is showing early wilt symptoms in this 10-inch basket. [Photo Source: USDA APHIS PPQ, Bugwood.org]
These unrooted cuttings show necrosis of the lower leaves and black stem necrosis due to infection by Ralstonia solanacearum. [Photo Source: Margery Daughtrey, Cornell University]
Wilt on zonal geranium due to infection by Ralstonia solanacearum. [Photo Source: Jean L. Williams-Woodward, University of Georgia, Bugwood.org]
A geranium with several leaves showing wilting with associated chlorosis and necrosis due to Ralstonia solanacearum. [Photo Source: Margery Daughtrey, Cornell University, Bugwood.org]
A close up of the chlorosis and necrosis that develop in geranium leaves wilting from Ralstonia solanacearum infection. [Photo Source: Photo Source: Margery Daughtrey, Cornell University, Bugwood.org]
Yellowing of Leaves
Abnormal yellowing symptoms. [Photo Source: The Plant Disease Diagnostics Clinic, University of Wisconsin-Madison/Extension]
Yellowing symptom (chlorosis) of Americana Pink II variety.[Photo Source: USDA APHIS PPQ, Bugwood.org]
Bacterial Blight
The following two images show symptoms of Bacterial Blight caused by Xanthomonas pelargonii on geranium, Pelargonium spp.
Wilting symptoms caused by Bacterial Blight, Xanthomonas pelargonii, are indistinguishable from Ralstonia solanacearum wilting. [Photo Source: Margery Daughtrey, Cornell University]
Bacterial Blight, Xanthomonas pelargonii, also causes characteristic spotting of leaf tissue. [Photo Source: Margery Daughtrey, Cornell University]