‘Sunrise’ is an early-maturing pear cultivar that combines excellent appearance and fruit quality and good storage potential for an early-maturing pear with resistance to fire blight caused by the bacterium Erwinia amylovora (Burr.) Winsl. et al. (van der Zwet and Beer, 1999). All major cultivars of commercial importance as well as many of those grown by home orchardists are susceptible to this devastating disease, which is endemic to most pear production areas of the northern hemisphere. ‘Sunrise’ was released by the U.S. Department of Agriculture in 2006.
Elkins, R.B., Turner, J., Seavert, C.F., Castagnoli, S., Mitcham, E.J., Biassi, S.V., Colonna, A. & Bell, R.L. 2008 Evaluation of potential alternative European pear cultivars for U.S. west coast growers Acta Hort. 800 483 490
Norelli, J.L., Aldwinckle, H.S. & Beer, S.V. 1988 Virulence of Erwinia amylovora strains to Malus sp. Novole plants grown in vitro and in the greenhouse Phytopathology 78 1292 1297
Royal Horticultural Enterprises Limited 2001 Royal Horticultural Society colour chart Royal Horticultural Enterprises Limited Woking, Surrey, UK
van der Zwet, T. & Beer, S.V. 1999 Fire blight—Its nature, prevention, and control: A practical guide to integrated disease management U.S. Dept. Agr., Agr. Inform. Bul. No. 631
van der Zwet, T., Oitto, W.A. & Brooks, H.J. 1970 Scoring system for rating the severity of fire blight in pear Plant Dis. Rptr. 54 835 839