Pathogeny Molecular Diagnosis and Outbreak Factor Analysis of Tomato Yellow Leaf Curl Disease in Zhangzhou, Fujian Province
ZHENG Yu1, DING Xue-Lin1, YAO Feng-Luan1,2, LU Xue-Song1, HE Yu-Xian1,2*, WENG Qi-Yong1,2
1 Fuzhou Scientific Observing and Experimental Station of Crop Pests of Ministry of Agriculture, Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China; 2 State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Abstract ： In September of 2017, a serious virus disease of tomato (Solanum lycopersicum) broke out in Dongyuan town, Zhangzhou city, Fujian province, which caused severe yield loss and accompanied with the occurrence of a large number of whiteflies (Bemisia tabaci). In order to identify what type of the pathogenic virus, molecular diagnosis of the virus strain isolates was done in this research, and then, the biotype and the virus carrying rate of B. tabaci were surveyed. At the same time, the acquisition, transmission and retention of gemini viruses by B. tabaci were studied in laboratory. The results revealed that the virus sample was Tomato yellow leaf curl virus (TYLCV), the B. tabaci was B-biotype and had a very strong ability to acquire and transmit the TYLCV. The virus-carrying rate could reach up to 100%. All this indicated that whitefly-transmitted gemini viruses (WTG) was a main reason to cause the outbreak of TYLCV disease on tomato in Zhangzhou city. This will provide the basis and help for the prevention and control of TYLCV in the future.
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