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On-Farm Evaluations of Auxin Nozzles for Peanut Pest Management - Year 2
AUTHOR
Eric P. Prostko
Professor and Extension Weed Specialist
University of Georgia
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TABLE OF CONTENTS
On-Farm Evaluations of Auxin Nozzles For Peanut Pest Management (Year 2)
Peanut and Cotton In Georgia - 2019
XtendFlex® and Enlist™ Cotton Varieties in Georgia
Nozzle Requirements for Auxins
Small-Plot Research vs. Commercial Applications (Are we missing something?)
Objective:
2019 Nozzle Tests Farmer Cooperators
2019 Commercial Nozzle Tests Spray Card Analysis
2019 Nozzle Tests VMD50 and Coverage
Bulloch County Nozzle Test March 21, 2019 (Rep 2, card #4)
Pierce County Nozzle Test March 26, 2019 (Rep 1, card #5)
Worth County Nozzle Test April 4, 2019 (Rep 2, card #2)
Droplet Size and Spray Coverage from 2019 Nozzle Tests with Commercial Sprayers
2019 Commercial Nozzle Tests Field Methodology
2019 Nozzle Tests (Weeds, Insects, Disease, Yield)
2019 Peanut Nozzle Tests
2019 Nozzle Tests Pesticides/Fertilizers Applied
Late-Season Insect, Weed, and Disease Ratings from 2019 Nozzle Tests with Commercial Sprayers
2019 Nozzle Test XRC-11004-VP
2019 Nozzle Test TTI-11004-VP
2019 Nozzle Test TDXL-11004-D
Yield Data 18’ or 36’ width by field length (0.18-1.07A)
Peanut Yield As Influenced By Nozzle Type from 2019 Nozzle Tests with Commercial Sprayers
Summary - 2019
Conclusions
Questions/Comments
SLIDE CONTENTS
On-Farm Evaluations of Auxin Nozzles For Peanut Pest Management (Year 2) E.P. Prostko1, M.R. Abney, R.C. Kemerait, G.C. Rains, D. S. Carlson, J.L. Jacobs, D.B. Sutherland, W.G. Tyson 1Department of Crop & Soil Sciences
Peanut and Cotton In Georgia - 2019 660,000 acres harvested 47.4% of US Total (#1) 1,390,000 acres harvested 11.8% of US Total (#2) Source: USDA/NASS, Crop Production – 2019 Summary (01/10/2020)
XtendFlex® and Enlist™ Cotton Varieties in Georgia Source: USDA/AMS Annual Cotton Variety Reports (mp_cn833)
Nozzle Requirements for Auxins Xtendimax® Enlist One™
Small-Plot Research vs. Commercial Applications (Are we missing something?)
Objective: Compare the field performance of auxin nozzles (TTI, TDXL) to flat fan nozzles in commercial peanut fields (year 2). Spray card analysis droplet size and coverage DropletScan or DepositScan weeds, insects, disease, yield
2019 Nozzle Tests Farmer Cooperators Bulloch County Greg Sikes JD4630, 90’ boom Pierce County Jim Waters JD4730, 100’ boom Worth County Steve Patterson JD4730, 90’ boom
2019 Commercial Nozzle Tests Spray Card Analysis
2019 Nozzle Tests VMD50 and Coverage R1 R2 R3 10 feet 10 feet tractor
Bulloch County Nozzle Test March 21, 2019 (Rep 2, card #4) JD 4630, 90’ boom, 15” spacing, 12 GPA, 12 MPH, 28 PSI, 36” boom height (avg.) XRC-11004 TTI-11004 TDXL-11004D
Pierce County Nozzle Test March 26, 2019 (Rep 1, card #5) JD 4730, 100’ boom, 15” spacing, 15 GPA, 11.6 MPH, 18-20 PSI, 36” boom height (avg.) XR-11006 TTI-11006
Worth County Nozzle Test April 4, 2019 (Rep 2, card #2) JD 4730, 90’ boom, 20” spacing, 20 GPA, 12.5 MPH, 42-57 PSI, 36” boom height XRC-11006 TTI-11006
Droplet Size and Spray Coverage from 2019 Nozzle Tests with Commercial Sprayers1 1According to DepositScan™ 2According to DropletScan™ 3JD4630, 90’ boom, 15” nozzle spacing, 12.0 MPH, 12 GPA, 28 PSI, 36” boom height 4JD4730, 100’ boom, 15” nozzle spacing, 11.6 MPH, 15 GPA, 18-20 PSI, 36” boom height 5JD4730, 90’ boom, 20” nozzle spacing, 12.5 MPH, 20 GPA, 42-57 PSI, 36” boom height 6Means in the same row within same location with the same letter are not significantly different (LSD = 0.10). Means from 21 kromekote water sensitive cards.
2019 Commercial Nozzle Tests Field Methodology 3 commercial peanut fields Plot size sprayer width (90’-100’) X field length (437’-1993’) 4 replications 2 nozzle types 3 in Bulloch All agri-chemicals ANOVA Fisher’s Protected LSD (P=0.10)
2019 Nozzle Tests (Weeds, Insects, Disease, Yield)
2019 Peanut Nozzle Tests
2019 Nozzle Tests Pesticides/Fertilizers Applied
Late-Season Insect, Weed, and Disease Ratings from 2019 Nozzle Tests with Commercial Sprayers** 1JD4630, 90’ boom, 15” nozzle spacing, 12.0 MPH, 12 GPA, 28 PSI, 36” boom height 2JD4730, 100’ boom, 15” nozzle spacing, 11.6 MPH, 15 GPA, 18-20 PSI, 36” boom height 3JD4730, 90’ boom, 20” nozzle spacing, 12.5 MPH, 20 GPA, 42-57 PSI, 36” boom height **No significant differences were observed between nozzle type at any location (P>0.10).
2019 Nozzle Test XRC-11004-VP Bulloch Co. 9/9/19 115 DAP
2019 Nozzle Test TTI-11004-VP Bulloch Co. 9/9/19 115 DAP
2019 Nozzle Test TDXL-11004-D Bulloch Co. 9/9/19 115 DAP
Yield Data 18’ or 36’ width by field length (0.18-1.07A) Bulloch Co. 10/08/19
Peanut Yield As Influenced By Nozzle Type from 2019 Nozzle Tests with Commercial Sprayers 1JD4630, 90’ boom, 15” nozzle spacing, 12.0 MPH, 12 GPA, 28 PSI, 36” boom height 2JD4730, 100’ boom, 15” nozzle spacing, 11.6 MPH, 15 GPA, 18-20 PSI, 36” boom height 3JD4730, 90’ boom, 20” nozzle spacing, 12.5 MPH, 20 GPA, 42-57 PSI, 36” boom height 4Adjusted to 10% moisture.
Summary - 2019 Spray card analysis VMD50 larger with auxin nozzles (381-481 microns vs. 182-348 microns) Coverage better with auxin nozzles in 2/3 tests No differences in weeds, insects, disease, and yield between nozzles were observed in large, on-farm field trials. Pierce Co. 10/05/19
Conclusions 6 on-farm, large plot replicated trials in 2018 and 2019 + 4 site-years small-plot (weed control) No differences between nozzle type for insects, disease, weeds, and yield. Suggestions use at least 12 GPA good rotations timely applications grass control?? Worth Co. 09/24/19
Questions/Comments ANR Training November 2019