Wave of the Future: Espalier for Harvest and Pest Management Master Gardener Conference October 9, 2014 Chuck Ingels Farm & Horticulture Advisor UCCE Capitol Corridor MCP, Sacramento County http://cesacramento.ucanr.edu
Topics to be Covered Espalier intro & basics Trellis location and installation Espalier patterns and examples
Topics to be Covered Espalier intro & basics Why Wave of the Future? Intro Light Interception Trellis location and installation Espalier patterns and examples
Why the Wave of the Future? Management of New and Existing Pests Brown marmorated stink bug Other true bugs Asian citrus psyllid/hlb Spotted wing drosophila Codling moth Peach leaf curl
Excluding Pests Easier with Espalier Fair Oaks Horticulture Center
Excluding Pests Easier with Espalier Wind Damage 2012 2014
2012 Peach Leaf Curl Trial Individual Branches Treated Sprayed branches Agribon on branch Untreated Lime sulfur/ Microcop
2012 Peach Leaf Curl Trial Lime sulfur (late fall) and Microcop (late winter) very effective Agribon + Liquicop at equally effective Agribon alone, copper soap, and Liquicop were somewhat less effective, but still provided 60-80% control compared to untreated branches
Espalier French term; from Italian spalliera (something to rest the shoulder [spalla] against) Pronounced es-pal-yer or es-pal-yay Technique of growing trees into a two dimensional flat plane by training and pruning Began with Romans; refined in 1500s in Europe
Advantages of Espalier Training Narrow canopy; greater sunlight penetration Efficient crop production Ability to increase the growth of a branch by training it vertically, and later decrease growth and increase fruiting by training it horizontally Heat capture from walls in winter Good use of narrow spaces
Disadvantages Increased management & cost Can be challenging Fruiting branches/shoots less compatible Peach (1-yr. branches), fig/persimmon (current shoot) Sunburn & borers Some species overly vigorous
Tree Shape Determines Light Interception 1 X Sunlight > ~ 1.5 X Sunlight Shade Shade Sunlight Sunlight Shade
Improving Light Management Sunlight Sunlight > 2 X Sunlight Sunlight More fruit color Strong buds Strong flowers Shade Shade Larger fruit
Improving Light Management Sunlight Sunlight Sunlight > 2.5 X Sunlight Sunlight Sunlight Stronger buds Stronger flowers Larger fruit Sunburn?
Topics to be Covered Espalier intro & basics Trellis location and installation Location Trellis Construction Espalier patterns and examples
Locating the Trellis Avoid north-facing wall South-facing wall may increase heat in winter for citrus Can be grown on or near wall Keep 6-10 in. from wood walls Allowing 2-3 ft. facilitates tree and wall maintenance Avoid chain-link fencing Photo: KVDP
Locating the Trellis Photo: Pam Geisel
Ensure Adequate Sunlight
Trellis Construction Tips For wooden trellises & posts, use rot-resistant wood (cypress, cedar, redwood, pressure-treated) or metal end posts Sink posts in concrete that extends above ground Use heavy gauge wire (12 or 14 gauge) Support end posts to prevent wire sag
Screw eye Turnbuckle One Trellis Method Chain link top rail for support Crossarm for drip lines Post in concrete
Supporting the Trellis Ends Wire Vineyard trellis end post Helical anchor (earth anchor)
Topics to be Covered Espalier intro & basics Trellis location and installation Espalier patterns and examples Horizontal T (apple) Fan & 2-scafold fan (cherry, peach) Palmette verrier (Asian pear) Informal (citrus)
Typical Espalier Patterns Source: EspalierServices.com
Typical Espalier Patterns Source: EspalierServices.com
Espalier /Horizontal T Consider: Angle Shoots Upward Initially
Espalier /Horizontal T Promote Spurs
Espalier Pruning Growing Season Source: Pruning and Training (Amer. Hort. Soc.)
Dormant Pruning Young Espalier Before After
Vigorous Apple Horizontal T No Summer Pruning Shoots 6+ ft. long Fruiting wood shaded Looking up
Vigorous shoots Almost no spurs Vigorous Apple No Summer Pruning
Vigorous shoots removed Spurs, short shoots left Vigorous Apple Summer Pruning Aug.
Vigor management Provide space! Old Winkler Vine UC Davis
Pluot Espalier Year 1 Not enough space!
Palmette Verrier (Candelabra) Source: pepinieresdenghien.be Source: lesbeauxjardins.com
Palmette Verrier (Candelabra) Source: pepinieresdenghien.be Source: lesbeauxjardins.com
Palmette Verrier (Menorah) Asian Pear: Planted Jan. 2001 Late April, 2002 Late May, 2002
Palmette Verrier (Menorah) 2004
Palmette Verrier (Menorah) 2014
Palmette Verrier (Menorah) 2014 Before summer pruning After summer pruning
Cherry Fan Fair Oaks Hort. Center April 2013 July 2013
Cherry Fan Sept. 2014 Fan: No heading cuts yet Flower buds formed
Cherry Training Trial Upright Fruiting Offshoot (UFO) 2010 2012 2012
2-Scaffold Fan Peach Fair Oaks Hort. Center Peach Cherry
Espalier Peach/Nectarine Pruning and Training (AHS)
Spring Pruning of Mature Peach Tree Prune to 1 bud all but 2 new shoots per branch After harvest cut branch back to lower shoot
Spring Pruning of Mature Peach Tree Prune to 1 bud all but 2 new shoots per branch After harvest cut branch back to lower shoot
Flower buds Peach Fruiting Branches Veg. bud
Cherry, Peach Espalier Fair Oaks Horticulture Center Planted Feb. 2013 February April
Peach Espalier 2013 April June July
Peach Espalier July 2013
Peach Espalier 2013 Nov. July
Peach Espalier Feb./March 2014 Row cover (Agribon)
Peach Espalier (1) April 2, 2014 1 2 3
Peach Espalier (2) April 21, 2014
Peach Espalier April 21, 2014
Peach Espalier (3) May 17, 2014
Peach Espalier May 17, 2014 After pruning Shoots tied at angle
Peach Espalier Which cuts are OK?
Peach Espalier Dealing with Side Shoots
Peach Espalier (4) June 5, 2014
Flower buds forming (late July) Peach Espalier (5) July 12, 2014
Peach Espalier July 12, 2014 Year 2: 20 fruits Before After
Peach Espalier Sept. 14, 2014
Hi Density Orchards The wave of the future
Tatura Trellis
Citrus Espalier (Mandarin) July 2012 Aug. 2012 Aug. 2013
Citrus Espalier (Mandarin) Oct. 2014
Citrus Frost Protection Large Trees Difficult to Cover
Citrus Frost Protection Espalier Trees Easy to Cover
Thank You! The Wave of the Future
Questions? http://cesacramento.ucanr.edu