CHANGES IN THE DISTRIBUTION OF PHENYLAMIDE-RESISTANT STRAINS OF PHYTOPHTHORA-INFESTANS (MONT) DEBARY IN IRELAND 1985-89

被引：2

作者：

DOWLEY, LJ ^{[1
]}

OSULLIVAN, E ^{[1
]}

机构：

[1] PLANT PATHOL & ENTOMOL DEPT,OAK PK RES CTR,CARLOW,IRELAND

来源：

POTATO RESEARCH | 1991年 / 34卷 / 01期

关键词：

METALAXYL; FLOATING DISK; SOLANUM-TUBEROSUM L;

D O I：

10.1007/BF02358096

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Phenylamide-based fungicides were reintroduced to the Irish market in 1985. Mixtures of phenylamides and mancozeb were recommended for no more than 3 sprays in potato late blight control programmes with the last systemic spray to be applied not later than 31 July. Samples of potato foliage infected with P infestans were collected from the main potato growing areas in Ireland over a five-year period starting in 1985. Using the floating disc method, 11 % of the crops sampled in 1985 were found to have phenylamide-resistant strains of P infestans present. The number of crops with resistant strains increased rapidly up to 1988 when 83 % of the crops sampled had resistance. Factors affecting the distribution of resistance and the efficacy of a phenylamide-based spray programme are discussed.

引用

页码：67 / 69

页数：3