Ex Experi riences W s With G GEM EM Va Variety Ma Mana nagem - - PowerPoint PPT Presentation

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Ex Experi riences W s With G GEM EM Va Variety Ma Mana nagem ement ent (a (and nd New Ro Rootstocks). Co Consuelo Fe Fernndez No Nogue uera Br Brok okaw Nursery LLC Outlin ine History and origin of the cultivar

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Ex Experi riences W s With G GEM EM Va Variety Ma Mana nagem ement ent (a

(and nd New Ro Rootstocks).

Co Consuelo Fe Fernández No Nogue uera Br Brok

  • kaw Nursery LLC
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SLIDE 2

Outlin ine

  • History and origin of the cultivar
  • Experience at Brokaw Ranches
  • What have we learned

through our experience

  • Development in other countries
  • Challenges and uncertainties
  • A look into the future
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SLIDE 3

His istory

  • In 1986 roughly 10,000 seedlings were planted at Bob

Lamb’ s Camarillo grove by Dr Bob Bergh.

  • Lamb-Hass, GEM and other selections originated from

this Bob Lamb plot.

  • In 1992 3-29-5 (GEM) was selected and topworked at UC

South Coast Research and Extension Center.

  • In 1994 some material of the new selection was

distributed for testing by growers. Hank Brokaw topworked 4 trees for observation.

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SLIDE 4

Br Brok

  • kaw

aw Ran anches Experie ience

  • 4 trees topworked in 1994 at Cheravo Ranch in Santa Paula for observation and

evaluation.

  • An additional 50 trees were topworked in 1999.

Observations:

  • Upright, compact growth habit.
  • Excellent fruit quality.
  • Superior peeling characteristics.
  • Larger fruit sizes when compared to Hass.
  • Tendency to set fruit in clusters that hang under the tree’

s canopy.

  • Low alternation.
  • Matures slightly later than Hass.
  • It hangs well on the tree.
  • High yields.
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SLIDE 5

Br Brok

  • kaw

aw Ran anches Experie ience

  • In 2002 a US Plant Patent application for 3-29-5 (GEM) was

filed.

  • Brokaw Nursery was licensed to propagate GEM trees in

February 2004.

  • Initial sales volumes were very low.
  • In 2006 the GEM was included in a high density trial block

established by Brokaw Nursery at the Faught Ranch in Santa Paula.

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Fa Faught Ra Ranch High Density T rial

  • Planting Date: August 2006.
  • Planting Distance: 10’ x 12’.
  • Berms.
  • Drip Irrigation(2 lines, 18” between emitters y

0.5 galons/hr).

  • Girdling (Hass only).
  • Stakes.
  • Rootstock Scion combinations:

Hass/ Toro Canyon Hass/ Dusa Carmen/Dusa Carmen /Toro Canyon Leavens Hass/ Toro Canyon Leavens Hass/Dusa GEM/ Toro Canyon Lamb Hass/Dusa

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SLIDE 7
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SLIDE 8

Fa Faught Ra Ranch High Density T rial

  • Planting Date: August 2006
  • Planting Distance: 10’ x 12’
  • Berms
  • Drip Irrigation (2 lines, 18” between emitters y 0.5 galons/hr).
  • Girdling (Hass only)
  • Steaks
  • Prunning
  • Rootstock Scion combinations:

Hass/ Toro Canyon Hass/ Dusa Carmen/Dusa Carmen /Toro Canyon Leavens Hass/ Toro Canyon Leavens Hass/Dusa GEM/ Toro Canyon Lamb Hass/Dusa

  • GEM was well suited to high density
  • This experience with GEM at higher densities increased our enthusiasm for the cv.
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Fa Faught Ra Ranc nch Young ng Block

  • Bigger commitment to high densities.
  • Mainly Hass.
  • Planting Date: July 2009.
  • Planting distance: 6’ x 14.5’
  • Berms.
  • Drip Irrigation.
  • Girdling (Hass only).
  • Stakes.
  • In 2011 4 rows topworked to GEM.
  • In 2015 we initiated a progressive

conversion of 6 rows/year to GEM.

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SLIDE 10

Mu Mupu pu an and Ch Cheravo Ra Ranc nches

  • Based on these experiences, Brokaw Ranch

Company affirmed a commitment to the GEM variety.

  • 2013 – 2017: 21 Acres planted with GEM

(13,000 trees).

Planting Distances: 5’ x 14.5’ (600 trees/A). Berms. Drip Irrigation (2 lines, 18” between emitters y 0.5 galons/hr). Stake (2’’ diameter and 6’ tall). Irrigation and fertilization for GEM is 20% more than Hass. Pruning to control height and for rejuvenation?

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SLIDE 11

6 month old GEM trees at Cheravo Ranch

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2 year old GEM trees at Mupu Ranch

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Four year old GEM trees at Mupu Ranch.

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3077 12308 11111 13333 9426 4688 13846 12500 7692 7407 13725 13934 18750 10630 8333 5422 17000 14000 13000 15000 10000 12500 10000 13000 12000 10000

Q04 H01 H02 T01 T02 T03 T04 W01 W02 W03 2013 2014 2015 Lbs/A

GEM Avocado - Mupu Ranch Average Yield per Acre (Lbs./A)

#/Acre 14 #/Acre 15 #/Acre 16 #/Acre 17 Projected #/Acre 18

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SLIDE 15

9 793 178 299 121 152 410 787 798 3,267 7,912 16,051 17,877 37,959 46,000 5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 45,000 50,000 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018

Number of trees sold

Number of GEM (3-29-5) trees sold per year at BNLLC

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SLIDE 16

GE GEM: : wo world-wi wide development

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Challenges and uncertainties

Cultural

  • Rootstock effect.
  • Excessive bloom in young trees can cause leaf drop

(inherited from Gwen).

  • Cracking of fruit when hanging too late?
  • We don’

t yet have much experience in how it will respond to pruning.

  • Growers must take measures to supply the highest quality

possible. Marketing

  • Not Hass!!
  • Inexperience on a commercial scale. First larger

commercial blocks were planted in 2013.

  • Promotional effort needed to ensure success in the

marketplace.

  • Packers must take measures to supply the highest quality

possible.

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SLIDE 18

A A look into nto th the fu futu ture…

  • Rapid increase in new acreage in the near

term.

  • New GEM blocks going into production à

more fruit entering the market.

  • From a grower point of view a lot of potential

in Gem developmentà Higher efficiencies

  • To what extent might GEM displace Hass?
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GEM R Rootstock T T ria ial

Gem/R0.09 Gem/R0.13 Gem/R106 Gem/R.05 Gem/R0.13 Gem/R0.17 Gem/R0.09 Gem/R.05 Gem/R106 Gem/R0.47 Gem/R0.09 Gem/R0.13 Gem/R106 Gem/R.05 Gem/R0.13 Gem/R0.17 Gem/R0.09 Gem/R.05 Gem/R106 Gem/R0.47 Gem/R0.09 Gem/R0.13 Gem/R106 Gem/R.05 Gem/R0.13 Gem/R0.17 Gem/R0.09 Gem/R.05 Gem/R106 Gem/R0.47 Gem/R0.47 Gem/R106 Gem/R.03 Gem/R0.13 Gem/R.05 Gem/R0.30 Gem/R0.17 Gem/R0.47 Gem/R0.18 Gem/R0.13 Gem/R0.47 Gem/R106 Gem/R.03 Gem/R0.13 Gem/R.05 Gem/R0.30 Gem/R0.17 Gem/R0.47 Gem/R0.18 Gem/R0.13 Gem/R0.47 Gem/R106 Gem/R.03 Gem/R0.13 Gem/R.05 Gem/R0.30 Gem/R0.17 Gem/R0.47 Gem/R0.18 Gem/R0.13 Gem/R0.30 Gem/R.05 Gem/R0.06 Gem/R0.15 Gem/R0.18 Gem/R106 Gem/R0.18 Gem/R0.30 Gem/R0.54 Gem/R0.17 Gem/R0.30 Gem/R.05 Gem/R0.06 Gem/R0.15 Gem/R0.18 Gem/R106 Gem/R0.18 Gem/R0.30 Gem/R0.54 Gem/R0.17 Gem/R0.30 Gem/R.05 Gem/R0.06 Gem/R0.15 Gem/R0.18 Gem/R106 Gem/R0.18 Gem/R0.30 Gem/R0.54 Gem/R0.17 Gem/R0.06 Gem/R0.18 Gem/R0.54 Gem/R0.30 Gem/R0.47 Gem/R.03 Gem/R0.13 Gem/R0.54 Gem/R0.09 Gem/R0.30 Gem/R0.06 Gem/R0.18 Gem/R0.54 Gem/R0.30 Gem/R0.47 Gem/R.03 Gem/R0.13 Gem/R0.54 Gem/R0.09 Gem/R0.30 Gem/R0.06 Gem/R0.18 Gem/R0.54 Gem/R0.30 Gem/R0.47 Gem/R.03 Gem/R0.13 Gem/R0.54 Gem/R0.09 Gem/R0.30 Gem/R0.15 Gem/R0.54 Gem/R0.17 Gem/R0.18 Gem/R0.09 Gem/R0.06 Gem/R0.15 Gem/R.03 Gem/R.05 Gem/R0.06 Gem/R0.15 Gem/R0.54 Gem/R0.17 Gem/R0.18 Gem/R0.09 Gem/R0.06 Gem/R0.15 Gem/R.03 Gem/R.05 Gem/R0.06 Gem/R0.15 Gem/R0.54 Gem/R0.17 Gem/R0.18 Gem/R0.09 Gem/R0.06 Gem/R0.15 Gem/R.03 Gem/R.05 Gem/R0.06 Gem/R0.17 Gem/R0.03 Gem/R0.47 Gem/R0.09 Gem/R0.13 Gem/R0.54 Gem/R0.06 Gem/R106 Gem/R.03 Gem/R0.15 Gem/R0.17 Gem/R0.03 Gem/R0.47 Gem/R0.09 Gem/R0.13 Gem/R0.54 Gem/R0.06 Gem/R106 Gem/R.03 Gem/R0.15 Gem/R0.17 Gem/R0.03 Gem/R0.47 Gem/R0.09 Gem/R0.13 Gem/R0.54 Gem/R0.06 Gem/R106 Gem/R.03 Gem/R0.15

Location: Faught Ranch Planting Date: June 2017

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Th Thank you…