Rootstocks Mazzard, Mahaleb –seedling, full-size trees –intolerant of heavy, wet soils –Mazzard best for sweets –5 to10 years to bear fruit Gisela 5, 6 (7, 12) –40 to 70% –need staking –precocious –intensive management
Gisela Rootstocks Bear in 3rd leaf (20 lbs), full crop by 5th Spreading & fruit heavily Winter hardy and wet soil tolerant Suited to high density and can be covered for protection from birds, rain, frost
Gisela ® Rootstocks Gisela ® 5 Dwarf, 45% of Mazzard Precocious Needs support Runting and small fruit size? Gisela ® 6 Semi-dwarf, 75% of Mazzard Precocious and heavy bearing Need support Open, spreading and stocky Too large for P-Y-O? Gisela ® 12 ???
Bacterial canker Pseudomonas syringae Symptoms wilting/dying leaves ‘dead bud’ limb cankers Disease cycle over-winter on tree spread during spring Cultivar susceptibility Copper and resistant cvs. are your best friends
Web sites for more info Northwest Michigan Horticultural Research Station– Reports & Articles –http://www.maes.msu.edu/nwmihort/newsltr.htmhttp://www.maes.msu.edu/nwmihort/newsltr.htm New York Fruit Quarterly –http://www.nysaes.cornell.edu/hort/fq/http://www.nysaes.cornell.edu/hort/fq/ Fresh Market Sweet Cherry Varieties for Eastern North America (Summer 2003) Improving Sweet Cherry Branching (Spring 2001) Managing the Gisela Cherry Rootstocks (Winter 1999- 2000) Suggested training strategies for dwarf sweet cherry –http://www.hrt.msu.edu/department/Perry/Cherry_Articles/C herrytrng.htmhttp://www.hrt.msu.edu/department/Perry/Cherry_Articles/C herrytrng.htm