THE COMBINATION OF CYLINDROCARPON-LUCIDUM AND PYTHIUM-IRREGULARE AS A POSSIBLE CAUSE OF APPLE REPLANT DISEASE IN NOVA-SCOTIA

被引：40

作者：

BRAUN, PG

机构：

[1] Research Station Agriculture Canada, Kentville, NS

来源：

CANADIAN JOURNAL OF PLANT PATHOLOGY-REVUE CANADIENNE DE PHYTOPATHOLOGIE | 1991年 / 13卷 / 04期

关键词：

D O I：

10.1080/07060669109500914

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Possible causes of apple replant disease in Nova Scotia were investigated. Apple plants grown in containers of nonfumigated soils from five Nova Scotia apple orchards appeared healthy but were significantly shorter and lighter and had fewer and smaller leaves than plants grown in fumigated orchard soils. Root systems growing in nonfumigated orchard soils had lower volumes and weights than those in fumigated soils and showed symptoms of disease, such as discolouration, numerous black lesions, and extensive cortical decay. Roots produced in fumigated soil had no visible symptoms of disease. Pythium irregulare, Cylindrocarpon lucidum, and C. heteronema were isolated frequently from diseased roots growing in nonfumigated soil but were not obtained from roots growing in fumigated soil. Both P. irregulare and C. lucidum caused some root discolouration and reduced the growth of apple seedlings when added singly to potting medium, but when added together they caused significant root destruction and the plants developed symptoms that resembled those of apple replant disease.

引用

页码：291 / 297

页数：7

共 31 条

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