Summary
To find a fast and reliable test to assess resistance to Nectria galligena in apple, different methods of inoculation were compared using macroconidia of N. galligena and one-year-old cut shoots from mature trees of Cox's Orange Pippin, IVT 69078-19, James Grieve and Jonathan.
With the best inoculation method 11 genotypes were screened for resistance. Elstar, Golden Delicious, Jonathan and Lombart's Calville were highly resistant and the level of resistance of Ingrid marie, Gloster, Melrose, IVT 69078-19, Cox's Orange Pippin, James Grieve and Idared decreased in this order.
The best inoculation method proved to be simple, giving results within four to nine weeks after inoculation.
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van de Weg, W.E. Screening for resistance to Nectria galligena Bres. in cut shoots of apple. Euphytica 42, 233–240 (1989). https://doi.org/10.1007/BF00034459
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DOI: https://doi.org/10.1007/BF00034459