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Symptoms and Control Methods of Geranium Ringspot Disease

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[Pathogen]Tobacco ringspot virus (Tobaccoringspotvirus, TomRSV), thermal inactivation point 58°C; Pelargonium ringspot virus (prlargoniumringspotvirus, PRSV), thermal inactivation point 85°C. [Symptoms]Chlorotic yellow spots, ringspots and line patterns appear on leaves, plants grow stunted, and flowers develop abnormally. [Disease pattern and epidemic characteristics]Propagating from cuttings taken from diseased plants is the main route of virus transmission. Sap

[Pathogen]Tobacco ringspot virus (Tobaccoringspotvirus, TomRSV), thermal inactivation point 58°C; Pelargonium ringspot virus (prlargoniumringspotvirus, PRSV), thermal inactivation point 85°C.

[Symptoms]Chlorotic yellow spots, ringspots and line patterns appear on leaves, plants grow stunted, and flowers develop abnormally.

[Disease pattern and epidemic characteristics]Propagating from cuttings taken from diseased plants is the main route of virus transmission. Sap and grafting can also transmit the virus. TRSV and TOMRSV can also be transmitted through soil nematodes and seeds.

[Control measures]A. Select healthy plants as propagation mother plants. Promptly pull out and destroy diseased plants. B. Pay attention to disinfecting pruning tools to avoid spreading the virus. C. Treating diseased plants at a constant 37°C for 4 weeks can inactivate the virus, or virus-free plants can be obtained through shoot-tip tissue culture.

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