Preliminary Study on the Symptom Types of Panax notoginseng Virus Disease and Their Distribution

In order to study Panax notoginseng virus disease symptom type and their damage degree, we made an investigation in 11 townships (towns) of Wenshan, Yanshan, Qiubei and Maguan Counties by parallel sampling survey method and weighted average method. The results showed that the P. notoginseng virus disease symptoms could be divided into seven types including shrinking, chlorosis, mosaic, pitting leaf spot, the donkey ears, bushy top and complex. The type of shrinking widely distributed in P. notoginseng production areas of Wenshan. The average incidences of shrinking disease were 6.56% in 2011, 2.21% in 2012 and 14.21% in 2013. The types of chlorosis and mosaic were seldom observed in P. notoginseng planting garden and their average incidences were below 3% and 1%, respectively. Pitting leaf spot commonly occurred in most planting garden and the incidence reached 11.42% in some gardens. Donkey ears type occasionally happened, but caused heavy damage in the garden with high light transmittance. Bushy top was only observed in some gardens and its average incidence was under 0.5% during the three survey years. Comprehensive symptoms appeared in the biennial and the third-year P. notoginseng planting garden, and happened seriously in some gardens. Therefore, though the symptoms of P. notoginseng virus disease are various, the shrinking type is dominant among the virus diseases; we should pay attention to it in the production areas.