Abstract
Examination of clubroot in cruciferous vegetables in Finland in 1974—1978 revealed the disease in 81 % of the 101 communes inspected. The disease was most common in southern and central Finland, but was also discovered in the northern parts of the region in which cruciferous crops were cultivated (66 —67° N. lat.). Clubroot was found in 65 % of the 375 plant samples collected. It occurred in 68 % of the samples of the most commonly cultivated vegetable, cabbage (56 % of the material), in 63 °Jo of the cauliflower samples (22 % of the material), in 56 % of the samples of other cole species (13 % of the material) and in 64 % of the samples of cruciferous root crops (10 % of the material). P. brassicae race determinations were performed on 90 samples. The classification system of Williams (1966) was applied. The races that were isolated were 1,2, 3,4, 6 and 7. Race 2 was by far the most common, being found in 32 communes; races 3,4, 6 and 7 were each found in 9—12 communes; race 1 only in one commune. No clear differences in the occurrence of the races in the various parts of the country could be observed. A comparison is made between Williams’ and the ECD (Buczacki et al. 1975) classification systems. In addition, the pathotypes in clubroot material from Norway and Iceland were determined.
Highlights
The records on the occurrence of clubroot disease in Finland date back to the 1860 (Jamalainen 1936)
According to the information collected by the Department of Plant Pathology, Agricultural Research Centre, clubroot had spread all over the country, including the western regions, by the 1930
The disease was more severe in eastern Finland than in western Finland. This was possibly partly caused by cultivation techniques, mainly by the fewer opportunities for crop rotation on the farms in eastern Finland. In these areas many farmers had to give up the production of cruciferous vegetables altogether because of clubroot disease in the s and ’7os
Summary
The records on the occurrence of clubroot disease in Finland date back to the 1860 (Jamalainen 1936). It is assumed that the disease came to Finland from the east, from Russia (Rainio 1930). In his studies on the cause of crucifer hernia, Woronin (1878) mentions that cabbage plant materials used by him came s s from the regions of St. Petersburg (Leningrad) and Wiborg 1 in Finland. According to the information collected by the Department of Plant Pathology, Agricultural Research Centre, clubroot had spread all over the country, including the western regions, by the 1930. The efficiency of new pesticides was studied in 1944—1977 (Linnasalmi 1948, 1952, 1959; Linnasalmi and Tiittanen 1960; Murtomaa and Uoti 1972; annual reports of the Department of Plant Pathology of the Agricultural Research Centre 1960—1977, mimeographs)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
