Role of Metalized Reflective Mulch with Nutritional and Insecticidal Treatments in Mitigation of HLB in New Citrus Plantings Mini-Field Day, A Duda & Sons “Old Nursery” 19 June 2015 Phil Stansly, Scott Croxton & Joby Sherrod w/funding from CRDF Table 1. Summary of cultural practices used for polyethylene mulch, insecticide, and foliar nutrition evaluation in citrus production with drip irrigation. Field Summary Location Duda Grove LaBelle, FL Experimental Design Split plot Randomized Complete Block Design: Main plots: (1) foliar nutrition alone, (2) insecticide alone, (3) both, (4) neither Subplots: with and without metalized mulch. Irrigation 2, 2gal/hr BowSmith Drippers per tree + flood for freeze protection Tree Spacing 9 ft in row 23 between rows = 208 trees/acre Area 10 acres Planting Date July 3-4, 2012 Scion rootstock ‘Hamilin’orange on ‘Carrizo’ citromelo Rows North-South
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Role of Metalized Reflective Mulch with Nutritional and Insecticidal Treatments in Mitigation of HLB in
New Citrus Plantings Mini-Field Day, A Duda & Sons “Old Nursery” 19 June 2015
Phil Stansly, Scott Croxton & Joby Sherrod w/funding from CRDF
Table 1. Summary of cultural practices used for polyethylene mulch, insecticide, and foliar nutrition evaluation in citrus production with drip irrigation.
Field Summary Location Duda Grove LaBelle, FL Experimental Design
Split plot Randomized Complete Block Design: Main plots: (1) foliar nutrition alone, (2) insecticide alone, (3) both, (4) neither Subplots: with and without metalized mulch.
Irrigation 2, 2gal/hr BowSmith Drippers per tree + flood for freeze protection Tree Spacing 9 ft in row 23 between rows = 208 trees/acre Area 10 acres Planting Date July 3-4, 2012 Scion rootstock ‘Hamilin’orange on ‘Carrizo’ citromelo Rows North-South
Table 2. Insecticide applications from planting to present.
Insecticide Program
Date Product Active Ingredient Rate Method Areas Treated
Table 3. Foliar nutrition applications from planting to present.
Foliar Nutrition Program
Date Product Rate/Acre
July 12, 2012 Fortress + N-Sure 1/2 lb + 1/2 gal
August 7, 2012 Fortress + N-Sure 1/2 lb + 1/2 gal
September 10, 2012 Fortress + N-Sure 1/2 lb + 1/2 gal
October 2, 2012 Fortress + N-Sure 1/2 lb + 1/2 gal
November 1, 2012 Fortress + N-Sure 1/2 lb + 1/2 gal
February 7, 2013 Fortress + N-Sure 1/2 lb + 1/2 gal
March 7, 2013 Fortress + N-Sure 1/2 lb + 1/2 gal
April 2, 2013 Fortress + N-Sure 1/2 lb + 1/2 gal
May 7, 2013 Fortress + N-Sure 1/2 lb + 1/2 gal
June 3, 2013 Fortress + N-Sure 1/2 lb + 1/2 gal
July 3, 2013 Fortress + N-Sure 1/2 lb + 1/2 gal
August 1, 2013 Fortress + N-Sure 1/2 lb + 1/2 gal
September 10, 2013 Fortress + N-Sure 1/2 lb + 1/2 gal
October 8, 2013 Fortress + N-Sure 1/2 lb + 1/2 gal
February 4, 2014 Fortress + N-Sure 1/2 lb + 1/2 gal
March 5, 2014 Fortress + N-Sure 1/2 lb + 1/2 gal
April 14, 2014 Soar Citrus Mix + N-Sure 1/2 gal + 1/2 gal
May 1, 2014 Fortress + N-Sure 1/2 lb + 1/2 gal
June 4, 2014 Soar Citrus Mix + N-Sure 1/2 gal + 1/2 gal
July 9, 2014 Griffin Green 1 gal
August 5, 2014 Fortress + N-Sure 1/2 lb + 1/2 gal
September 3, 2014 Griffin Green 1 gal
October 15, 2014 Tricite 20-20-20 10 lb
November 10, 2014 Tricite 20-20-20 10 lb
January 20, 2015 Tricite 20-20-20 10 lb
February 26, 2015 Tricite 20-20-20 10 lb
March 10, 2015 Fortress + N-Sure 1/2 lb + 1/2 gal
April 7, 2015 Griffin Green 1 gal
May 26, 2015 4-0-8 10 gal
Table 4. Mean (±SEM) canopy and soil temperatures recorded over a 24 month period every 20 min at center canopy and at 5.08 cm soil depth . Low 0.1%a High 0.1%b All Observations Hours over 380C
Mulch Canopy 2.16±0.28 43.21±0.12 23.11±0.21 445
No Mulch Canopy 5.68±0.18 40.15±0.11 22.63±0.33 327.33
Mulch Soil 9.78±0.07 38.36±0.06 25.16±0.26 66.67
No Mulch Soil 8.19±0.11 37.67±.05 24.1±0.34 41 aMean temperature for the lowest 0.1% of the recorded samples. bMean temperature for the highest 0.1% of the recorded samples.
Table 5. Yield and juice quality analysis of Fruit harvested 9 December 2014.