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David Sugar

David Sugar

Professor Emeritus,
Ph.D., 1990, Oregon State University, Corvallis
David.Sugar@oregonstate.edu

 

Office/Lab: Southern Oregon REC
Phone: 541-772-5165

Research Area

Integrated management of post-harvest fruit diseases.

Description of Research

My research emphasizes the development of techniques for integrated management of post-harvest fruit diseases, including cultural, chemical, and biological methods. Management strategies for disease control without the use of fungicides, and integration of disease control with horticultural practices are studied.

Related Links

Southern Oregon Research & Extension Center

Publications

Sugar, D. 2002. Management of postharvest diseases. Chapter 9 in: Knee, M. (ed.). Fruit Quality and its Biological Basis. Sheffield Academic Press, Sheffield, UK.

Henriquez, J.L., D. Sugar, and R.A. Spotts. 2004. Etiology of bull’s eye rot of pear caused by Neofabraea spp. in Oregon, Washington, and California. Plant Disease 88:1134-1138.

Sugar, D., D.C. Elfving, and E.A. Mielke. 2004. Effects of prohexadione-calcium on fruit size and return bloom in pear. HortScience 39:1305-1308.

Sugar, D., and S.R. Basile. 2005. Effects of Flotation Solutions on Sodium o-Phenyl Phenate Injury to Pears and on Incidence of Postharvest Decay. Postharvest Biology and Technology 37:122-128.

Sugar, D., R.J. Hilton, and P.D.VanBuskirk. 2005. Effects of Kaolin Particle Film and Rootstock on Tree Performance and Fruit Quality in 'Doyenne du Comice' Pear. HortScience 40:1726-1728.

Henriquez, J.L., D. Sugar, and R.A. Spotts. 2006. Induction of Cankers on Pear Tree Branches by Neofabraea alba and Neofabraea perennans, and Fungicide Effects on Conidial Production on Cankers. Plant Dis.
90:481-486.

Sugar, D., and S.R. Basile. 2006. Ethylene treatment promotes early ripening capacity in mature 'Comice' pears. HortTechnology 16:89-91.

Henriquez, J.L., D. Sugar, and R.A. Spotts. 2008. Effects of environmental factors and cultural practices on bull's eye rot of pear. Plant Dis. 92:421-424.

Sugar, D., and S.R. Basile. 2008. Color and russet variation among selections of 'Bosc' pear. J. Amer. Pomological Soc. 62:77-81.

Sugar, D., and S.R. Basile. 2008. Timing and sequence of postharvest fungicide and biocontrol agent applications for control of pear decay. Postharvest Biology and Technology 49:107-112.

Henriquez, J.L., D. Sugar, and R.A. Spotts. 2008. Effects of environmental factors and cultural practices on bull’s eye rot of pear. Plant Dis. 92:421-424.

Sugar, D., and S.R. Basile. 2009. Low-temperature induction of ripening capacity in ‘Comice’ and ‘Bosc’ pears as influenced by fruit maturity. Postharvest Biology and Technology 51:278-280.

Spotts, R.A., M. Serdani, K. Wallis, M. Walter, T. Harris-Virgin, K. Spotts, D. Sugar, and C.L. Xiao. 2009. At-harvest risk prediction for gray mold of pear fruit in long-term cold storage. Crop Protection 28:414-420.  

Spotts, R.A., Seifert, K., Wallis, K.M., Sugar, D., Xiao, C.L., Serdani, M., and Henriquez, J.L. 2009. Description of Cryptosporiopsis kienholzii, species profiles of Neofabraea in major pome fruit growing districts in the Pacific Northwest, and sensitivity to fungicides. Mycological Research 113:1301-1311.

Stockwell, V.O., Johnson, K.B., Sugar, D., and Loper, J. 2010. Control of fire blight by Pseudomonas fluorescens A506 and Pantoea vagans C9-1 applied as single strains and mixed inocula. Phytopathology 100:1330-1339.

Stockwell, V.O., Johnson, K.B., Sugar, D., and Loper, J. 2011. Mechanistically compatible mixtures of bacterial antagonists improves biological control of fire blight of pear. Phytopathology 101:113-123.

Sugar, D. and Basile, S.R. 2011. Orchard calcium and fungicide treatments mitigate effects of delayed postharvest fungicide applications for control of postharvest decay of pear fruit. Postharvest Biology and Technology 60:52-56.

Sugar, D. and Einhorn, T.C. 2011. Harvest maturity and conditioning temperature influence induction of ripening capacity in ‘d’Anjou’ pear fruit. Postharvest Biology and Technology 60:121-124.