Indications of soilborne inoculum of Phytophthora infestans

被引:74
作者
Andersson, B
Sandström, M
Strömberg, A
机构
[1] Swedish Univ Agr Sci, Dept Appl Plant Protect, S-75007 Uppsala, Sweden
[2] Swedish Univ Agr Sci, Dept Plant Biol, S-75007 Uppsala, Sweden
关键词
potato late blight; mating types; oospores; Solanum tuberosum L;
D O I
10.1007/BF02358962
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
In this paper we present observations made during three years in a potato field in Sweden that indicated the presence of soil borne inoculum of Phytophthora infestans. In 1994, a fungicide trial against late blight was left in the field with various degrees of late blight infection. In 1995, cereals was grown in the field. In 1996, certified potato seed tubers were planted and blight appeared early in the season in a pattern corresponding to the heavily infected areas in 1994. No volunteer potato plants were found in 1995 or 1996. Both mating types A1 and A2 were isolated in 1996 and 1997 and oospores were found in leaves, stems as well as in stolons.
引用
收藏
页码:305 / 310
页数:6
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