Half a century of potato cyst nematode (Globodera spp ... - Izbis

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Pathotypes occuring in Norway Ro1 Ro2 G. rostochiensis Ro3 Pa1 G. pallida Pa2 Pa3 G. rostochiensis is present and widespread in southern part of the country. Surveys 1956-1978 indicated that Ro1 is present in almost 98 % of the PCNpopulations , G. pallida, first recorded in 1974; is present with limited distribution in agricultural land, but with major distribution on home gardens.
Resistance-breaking pathotypes • The selection for resistance-breaking pathotypes has been demonstrated in a long-term field trial. • The continuous cropping of Ro1 resistant potato cultivars for 10 years resulted in Ro3 overcoming Ro1. • Complementary laboratory studies indicated that continuous growing of H 1 resistant cv. Saturna in soil with Ro1/Ro3 mixtures, showed that an initial Ro3 frequency as low as 0.1% in 5 years time resulted in high populations of Ro3.
Page 1 and 2: Half a century of potato cyst nemat
Page 3 and 4: Potato cultivation in Norway • Fa
Page 5 and 6: Background of potato cyst nematode
Page 7 and 8: Sampling to estimate PCN occurrence
Page 9 and 10: Analysed samples in 2010 County Tot
Page 11 and 12: PCN Management • The management o
Page 13 and 14: Statutory regulations from 1990-201
Page 15 and 16: The potato cultivation standard •
Page 17 and 18: French fries Early Potato varieties
Page 19 and 20: PCN and certified seed potato • O
Page 21 and 22: . Globodera spp. in Found in Norway
Page 23 and 24: G. achillae A-E G. artemisiae B-F G
Page 25 and 26: G. pallida G. rostochiensis
Page 27: Identification of pathotypes • St
Page 31 and 32: Occurrence and pathogenicity of mic
Page 33 and 34: Conclusions • The occurrence of a

Half a century of potato cyst nematode (Globodera spp ... - Izbis

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