Testing of seed-borne fungi of Panax notoginseng seed
Panax notoginseng, cultivated in Yunnan, China, is an important medicinal herb. Contaminated seeds are the primary mean of disease dissemination. This study aimed to detect the pathogens on seeds of P. notoginseng collected from Wenshan production regions. Petri-dish testing was made of seed-borne fungi in the P. notoginseng seed samples collected from P. notoginseng-producing bases in Yunnan. The pathogens were isolated, cultured, purified, and identified by its morphological features and ITS sequences. The results showed that Fusarium spp. is the main pathogen on the surface of P. notoginseng seeds including F. oxysporum, F. graminearum, F. equiseti and F. proliferatum; Plectosphaerella cucumerina represented main pathogens inside, other pathogens including Botrytis cinerea, F. equiseti, F. proliferatum, F. lateritium and Botryosphaeria dothidea. The seed-borne rate of fungi from P. notoginseng is about 73.75%. Moreover, the disinfection effects of two fungicides and three fumigants were investigated. The inhibiting effect of fumigants on seed-borne pathogens is much better than that of fungicides.
Liu, Xiaoman and Cao, Aocheng (2020). Testing of seed-borne fungi of Panax notoginseng seed. Acta Hortic. 1270, 315-320
Panax notoginseng, seed pathogens, seed-borne fungi