Apple Research Supported. Growers University of Guelph, Simcoe & Vineland Campuses.

Transcription

1 Apple Research Supported by the Ontario Apple Growers Jo ohn Cline, Associate Professor University of Guelph, Simcoe & Vineland Campuses Te el: Ext 331 Jcline@uoguelph.ca 1

2 Research and Technical Support Debbie Norton, Techniciann Research Station Support Staff Graduate Students - Ali Tah heri, two positions available 2

3 2007 Experiments ( Proposed in April 2007) Establish a super spindle research orchard of Honeycrisp/M.26, Aurora Golden Gala/M.26, Ambrosia/M.9, and Royal Gala/M.9 Continue Maxcel (6-BA) thinnini ng research, primarily il for registration purposes Investigate the influence of thin nning on mummy fruit formation in Gala and Honeycrisp (Gardner, Celetti) Investigate the horticultural benefits of Surround on Gala. Continue 1999 and 2002 rootstock experiments 3

4 Economics of Thinning Approximately $ 500/acre (based on $10/hr) Labour intensive practices will be more difficult in the future Harvest efficiency is directly related to the amount of thinning i $12.50 $10.00 $7.50 $5.00 $2.50 $0.00 Ontario Minimum Wage

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7 6-BA Apple Thinn ing on Gala (2007) Table 3. Effect of Maxcel and Carbaryl on yield, fruit number and fruit size on 10-yr-old 'Royal Gala'/Bud.9 apple trees. University of Guelph, Simcoe, Ontario, TCSA Mean Total fall Yield fruit Crop number 2007 Yield efficiency weight density Rate fruit per Treatment (mg/l) (c cm 2 ) (kg.tree -1 ) (kg.cm 2 ) tree (g) (#.cm -2 ) Untreated Control Hand thinned control (every other spur) Maxcel Maxcel Maxcel + Carbaryl 75, Maxcel + Carbaryl 100, Exilis Exilis Exilis + Carbaryl 75, Exilis + Carbaryl 100, significance z ns ** * *** *** ** LSD (P=0.05) P value <

8 Effective thinning i with Ma axcel alone or with Carbaryl 8

9 6-BA Apple Thinnin g Ambrosia (2007) able 7A. Effect of Maxcel and Carbaryl on yield, fruit number and fruit size on 5-yr-old Ambrosia apple trees. Commercial Orchard, Simcoe, Ontario TCSA fall 2006 Yield Yield efficiency Total number Mean fruit weight Crop density reatment Rate (mg/l) (cm 2 ) (kg.tree -1 ) % of control (kg.cm 2 ) fruit per tree (g) % of control (#.cm -2 ) % of control and thinned control axcell axcel axcel + Carbaryl 75, axcel + Carbaryl 100, axcel + Carbaryl (at 10-12mm) followed 75, y 750 mg/l Carbaryl 7 days after first pray ignificance z ns *** *** *** ns *** SD (P=0.05) value < < < < ns, ***, **, *, indicates non significance and statistical significance at P=0.001, P=0.01, and P=0.05, respectively 9

10 Determining the Response of Gala and Ambrosia to Benefits Particle Film 10

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14 Particle film Royal Gala (2007) Table 3. Effect of particle film on tree growth, yield, number of fruit per tree, fruit size and crop density 'Gala' apple trees. University of Guelph, Simcoe, Ontario, Interval TCSA fall 2006 Yield Treatment (days) (cm 2 ) (kg.tree -1 ) Unsprayed Control sprays full rate ( 2.5 % w/v) sprays full rate ( 2.5 % w/v) sprays full rate ( 2.5 % w/v) sprays full rate ( 5.0 % w/v) sprays full rate ( 5.0 % w/v) sprays full rate ( 5.0 % w/v) Yield efficiency significance z ns * * * ns ns ns ns LSD (P=0.05) P value z ns, ***, **, *, indicates non significance and statistical significance at P=0.001, P=0.01, and P=0.05, Total number fruit per tree Mean fruit weight Crop density Mean leaf area Mean leaf dry weight (kg.cm 2 ) (g) (#.cm -2 ) (g) (g)

15 Rootstock Research 15

16 Rootstock t differences can be subtle but significant ifi Precocity, productivity, size control, disease resistance, cold hardiness, replant tolerance 16

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19 Research Challe enges and Future Since tree fruit crops are perennial, and by nature require long-term investment and support Long-term suppo ort today = 3 years (this is the time it takes to reach fruiting in a new orchard) 19

20 Apogee multi-year and carry-over effects, carry-over effects. Reduction in fruit size Irrigation new technology to conserve water and assist with scheduling Thinning non chemical approaches Nutrition cultivar specific prob blems such as low Ca in Honeycrisp Rootstocks development of V.5 and V.6 Other PGRs Abscisic acid being commercialized Horticultural methods to reduce labour costs Future Research 20

21 rcent of tot tal area Pe Ontario Apple Acreage by Cultivar and Age (Source: Ontario Apple Growers, 2007) Ontario Apple Production (2007) 1-5 yrs 6-10 yrs yrs yrs yrs 31+ years Plantings 1-5 Years, % by Cultivars Gala (21%), Ambrosia (15%), Honeycrisp (13%), McIntosh (13%), N. Spy (6%), Crispin (4%), Empire (4%), Aurora Golden Gala (2%) 0 McIntosh Red Delicious Empire Nor rthern Spy Idared Gala Golden Delicious Cris spin/mutsu Other Cortland Spartan H oneycrisp Ambrosia Paulared Jonagold Fuji Gi inger Gold J erseymac Golden Russet Jonamac Earligold Aurora 16, 35, 19% of trees are > 31, 21, 16 years old respectively 30% of trees are less than 16 years old 21

22 Orchard Profitability Cultivar, training system, rootstockss are most critical (fixed at planting) 22

23 Crimson Cri sp (Coop 39) The tree is moderately vigorous, grows upright and has good precocity. It blooms mid to late season. The strengths of Crimson Crisp are its immunity to scab and resistant to leaf rust Weaknesses include susceptibility to mildew and fi ire blight 23

24 Crimson Cri sp (Coop 39) Glossy rosy red, close to 100% fruit surface colour, yellow ground colour The fruit is quite large:64 76 mm (2½ -3 ) Flavour: sweet, moderately acid and spicy Fruit are not prone to russet. Flesh: cream in colour, has an extremely crisp texture Matures early October in Simcoe 24

25 oguelph.ca/treefruit