The structure of <Emphasis Type="Italic">Phytophthora infestans</Emphasis> populations from organic and conventional crops |
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| Authors: | Eve Runno-Paurson Triinu Remmel Ann Ojarand Alice Aav Marika Mänd |
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| Institution: | 1.Institute of Agricultural and Environmental Sciences,Estonian University of Life Sciences,Tartu,Estonia;2.Department of Zoology, Institute of Ecology and Earth Sciences,University of Tartu,Tartu,Estonia;3.Estonian Research Institute of Agriculture, Department of Plant Biotechnology EVIKA,Harjumaa,Estonia;4.Department of Biochemistry and Plant Protection,J?geva Plant Breeding Institute,J?geva alevik,Estonia |
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| Abstract: | The characteristics of populations of Phytophthora infestans from organic farms, small conventional farms and large conventional farms were determined from isolates collected in northern
Estonia in 2004 and 2005. For the population as a whole 41% were A2; all virulence factors to the 11 R genes from Solanum demissum were found; and more than 70% had high or intermediate resistance to metalaxyl. Isolates from organic farms tended to have
more complex pathotypes than isolates from either large or small conventional farms, but there was a higher proportion of
metalaxyl resistant isolates from large conventional farms than from small conventional farms or from organic farms. |
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