Ring spot disease of geranium
[pathogen] Tobacco ringspot virus (Tobaccoringspotvirus,TomRSV), lethal temperature 58 ℃, geranium ringspot virus (prlargoniumringspotvirus,PRSV), lethal temperature 85 ℃.
[symptoms] the leaves showed chlorotic maculae, ringspots and lines, the plant growth was short, and the flower development was abnormal.
[incidence regularity and epidemic characteristics] selection of cuttings from diseased plants is the main way of virus transmission. Sap and grafting can also transmit poison. TRSV,TOMRSV can also be transmitted by soil nematodes and seeds.
[prevention and control measures] A. The healthy plant was selected as the breeding mother plant. Remove the diseased plant in time and destroy it. b. The operating tools used for pruning should be disinfected to avoid spreading the virus. c. The virus was inactivated or the virus-free strain could be obtained by stem tip tissue culture when the diseased plant was treated at 37 ℃ for 4 weeks.
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Processing of geraniums?
Processing of geraniums: potted geraniums are suitable for display in public places such as halls, dining cars and meeting places to form a warm atmosphere. Decorating the family balcony, windowsill and desk is more effective, blooming throughout the year, showing a scene of prosperity. Planting or decoration in the open field, decorating rock gardens, flower beds or flower paths can also show the beauty of the plant shape and color of geraniums.
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Prevention and treatment of mosaic disease (cmv) of geranium
The symptoms of the leaves are mosaic-like, the leaves are smaller than normal, and show uneven. Some varieties produce chlorotic spots and broken flowers. The pathogen is cucumber mosaic virus (CMV). The route of transmission is transmitted by sap and aphids. Prevention and control methods 1. In the process of management and operation, often use soapy water to wash and disinfect. 2. Timely control of aphids and eradication of surrounding weeds.
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