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Journal of the American Pomological Society

American Pomological Society

Volume 52 Number 3 Article 26
Year 1998 Month 7
Title: ´Chester Thornless` Blackberry
Authors: G.J. Galletta, A.D. Draper, J.L. Maas, R.M. Skirvin, A.G. Otterbacher, H.J. Swartz and C.K. Chandler
Abstract:
'Chester Thornless' is a very vigorous, productive, large fruited, late maturing, moderately winterhardy thornless blackberry cultivar [Rubus sp., subgenus Rubus (Eubatus)] released jointly by the Agricultural Research Service, USDA, the Illinois Agricultural Experiment Station, the Ohio Agricultural Research and Development Center, and the Maryland Agricultural Experiment Station in 1985. It is well adapted south of a line extending from western Maryland, through central Ohio, to Kansas City, Missouri in the eastern United States and to portions of the West Coast of the United States. * Chester Thornless' is usually more productive than 'Hull Thornless' and, while it is similar in fruit size, color, firmness, quality, and seed size, 'Hull Thornless' is considered to have better flavor. Its fruit does not soften or lose color on hot, sunny and humid days as readily as fruit of other thornless semi-erect cultivars. 'Chester Thornless' has proven to be valuable to pick-your-own and back-yard growers, as well as to wholesale marketers. 'Chester Thornless' was named in recognition of the contributions of Dr. Chester Zych, former fruit researcher at the University of Illinois, who early recognized the merits of this blackberry and encouraged its advance testing and release. The outstanding characteristics of 'Chester Thornless' are plant hardiness and disease resistance, and high yields of large fruit of good quality. It is recommended as a replacement for 'Thornfree' in USDA hardiness zones 5-7 and possibly in zones 8 and 9.

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