PATHOGENICITY OF PYTHIUM SPECIES, CYLINDROCARPON-DESTRUCTANS, AND RHIZOCTONIA-SOLANI TO GINSENG SEEDLINGS IN ONTARIO

被引：56

作者：

REELEDER, RD

BRAMMALL, RA

机构：

[1] Agriculture and Agri-Food Canada, Pest Management Research Centre, Delhi, ON

[2] Horticultural Research Institute of Ontario, Simcoe, ON

来源：

CANADIAN JOURNAL OF PLANT PATHOLOGY-REVUE CANADIENNE DE PHYTOPATHOLOGIE | 1994年 / 16卷 / 04期

关键词：

D O I：

10.1080/07060669409500736

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Root rot and damping-off diseases are major problems in establishment of ginseng gardens, however, little is known with respect to the identity of seedling root pathogens. Pathogenicity trials of fungi (isolates of Pythium spp., Cylindrocarpon destructans, and Rhizoctonia solani) obtained from diseased seedling roots were conducted to determine their ability to reproduce symptoms observed in the field. Inoculation of seedlings with Pythium isolates resulted in rapid maceration of roots or damping-off. Cylindrocarpon destructans produced an orange-brown rot of seedling roots. Inoculation with R. solani resulted in rapid invasion of stem tissue followed by collapse of the plant. A survey of isolates of R. solani recovered from diseased seedlings indicated that most belonged to anastomosis group 2-1. However, members of AG 1-1C and AG 3 obtained from damped-off tobacco seedlings were able to cause damping-off of ginseng, and AG 2-1 isolates recovered from ginseng caused damping-off of tobacco seedlings.

引用

页码：311 / 316

页数：6

共 25 条

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