Factors Affecting the 2014 Pecan Crop Lenny Wells UGA - - PowerPoint PPT Presentation

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Factors Affecting the 2014 Pecan Crop Lenny Wells UGA - - PowerPoint PPT Presentation

Dec 01, 2022 315 likes •466 views

Factors Affecting the 2014 Pecan Crop Lenny Wells UGA Horticulture How Will 2013 Affect 2014? 2003 Pecan Crop: 75 million 2004 Pecan Crop: 45 million 2013 Pecan Crop: 55 million or less 89 million Trees attempted a good crop

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Factors Affecting the 2014 Pecan Crop

Lenny Wells UGA Horticulture

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SLIDE 2

How Will 2013 Affect 2014?

  • 2003 Pecan Crop:

75 million

  • 2004 Pecan Crop:

45 million

  • 2013 Pecan Crop:

55 million or less

Trees attempted a good crop Heavy Disease/Insect Pressure Cloudy Conditions If Yields fair to good with good quality or Trees never set crop If Crop lost after August or Poor Quality=Stressed Trees

Chance for good return crop Poor return crop potential

89 million

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2014 Georgia Pecan Crop

  • Carry-over of scab

inoculum

  • Cool, wet spring
  • Late budbreak
  • Heavy scab pressure prior

to June

  • Heavy pressure from

mites/black aphids

  • Dry nut sizing period
  • Short crop
  • Small nut size/High %

pops/reduced weight

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Nut Size Determined By:

Soil moisture during sizing Crop Load Temperature Sunlight

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April-September 2014 Rainfall Tifton, GA

1 2 3 4 5 6 7 8 9 1-Apr-14 8-Apr-14 15-Apr-14 22-Apr-14 29-Apr-14 6-May-14 13-May-14 20-May-14 27-May-14 3-Jun-14 10-Jun-14 17-Jun-14 24-Jun-14 1-Jul-14 8-Jul-14 15-Jul-14 22-Jul-14 29-Jul-14 5-Aug-14 12-Aug-14 19-Aug-14 26-Aug-14 2-Sep-14 9-Sep-14 16-Sep-14 23-Sep-14 30-Sep-14 Rainfall (cm) Date

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SLIDE 6

2 4 6 8 10 12 14 16 2011 2012 2013 2014

June-August Rainfall

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SLIDE 7

89 90 91 92 93 94 95 2011-2013 2014 Temperature (degrees F)

Temperature June-July

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200 400 600 800 1000 1200 1400 1600 1800 2000 2012 2013 2014 Lum/ft2

Sunlight Levels June-September

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SLIDE 9
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March/April Temperature, Rainfall and Pollination

March April

  • Avg. 1912-2003

69 77 2014 65.7 74.7 April

  • Avg. 1912-2003

3.81 2014 8.72 Temperature Rainfall

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Pollination Dates

Average

115 116 117 118 119 120 121 122 123 124 125 126 127 18 129 130 131 132 133 134 135 136

Desirable Stuart 2014 Desirable Stuart

Pollen Shed Pistil Receptivity

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Pecan Nut Drop Pattern

  • Environment

– Cool, Cloudy Conditions

  • Genetic Incompatibility:

– Pollen & female parents carry incompatibility gene(s)

Failed Embryo Fertilization May Result From:

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SLIDE 13

Ovule was not fertilized (poor pollination) OR Fruit aborted following nut sizing (pollen incompatability

  • r insufficient carbohydrates)
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SLIDE 14

November 2014 Freeze

10 20 30 40 50 60 70 Daily Low Temperature (F)