Evaluating Evaluating AvictaAvicta Complete Pac Complete Pac Plus Plus TeloneTelone II and Low II and Low -- High High

Nitrogen RatesNitrogen Rates

E. Burris E. Burris –– EntomologistEntomologist

D. Burns D. Burns –– GIS technicianGIS technician

M. Wolcott M. Wolcott –– GIS technicianGIS technician

C. Overstreet C. Overstreet –– NematologistNematologist

K. McCarter K. McCarter -- StatisticianStatistician

Presentation focal points

• Focus on thrips, disease and nematode complexes

• Present small plot and on-farm test results analyzed using GIS technique

• Test Products = – Avicta Complete Pac, Telone II fumigation,

and nitrogen treatments applied sidedressas 30-0-0-2

GIS tools for managing data

• GIS Programs– SSTool Box– ArcGis9– GeoDa™– Farm Works– Apex

• USDA-ARS– Yield monitor data cleaner– X-tension/Erdas

GPS Tools

• Technology – Omni Star– RTK – Veris cart– StarFire

• GS2• Original Greenstar• Yield monitor

Small Small plotplotaa:Geo:Geo--referenced field data;referenced field data; LSU LSU AgCenter,AgCenter, Northeast Research StationNortheast Research Station

1.Telone + 1.Telone + AvictaAvicta + 24 GPA, 30+ 24 GPA, 30--00--00--222. 2. AvictaAvicta + 37.2 GPA, 30+ 37.2 GPA, 30--00--00--223. Non3. Non--treated + 37.2, GPA, 30treated + 37.2, GPA, 30--00--00--22

Test 1Test 1

aaRCBRCB 3 treatments, 32 row plots, using 32 GPS points as replicates3 treatments, 32 row plots, using 32 GPS points as replicates

Test 1: Variables

• Stand • Root-knot Nematode• Thrips• Node of 1st square• NDVI• Yield• Economic analysis for Nitrogen mgt.

strategy

Statistical Analysis

• Conventional ANOVA• IDW – ArcGIS 9.1• Weighted Matrix – GeoDa 0.9• Histogram – ArcGis 9.1 and GeoDa 0.9• OLS Regression analysis – GeoDa 0.9

0.0001

0.37b

0.41a

0.55a

0.0013

6.4a

6.6a

6.0b

0.0006

816.8a

320.6b

141.8b

0.00001P>F

40.1cNon-treated +37.2 GPA 30-0-0-2

61.3bAvicta +37.2 GPA 30-0-0-2

69.2aTelone + Avicta+ 24 GPA 30-0-0-2

1st1st sq.sq. NDVINDVIStandStandRootRoot--KnotKnot

•Stand/25 ft. – 29 May, 2007 •RK – 11 June, 2007, 2007•Sq./nodes – 15 June, 2007•Greenseeker NDVI 15 June, 2007

TreatmentTreatment

TEST 1:

Identity of nematode hotspots using a interpolated surface; IDWGeoSpatial analysis feature of ArcGis 9.1

Identity of Identity of ThripsThrips HotHot--spots spots using a interpolated using a interpolated surface; IDW surface; IDW GeoSpatialGeoSpatialanalysis feature in analysis feature in ArcGisArcGis9.19.1

-$22

$100

$77

1370

1671

1652

195.93215.6Non-treated +37.2 GPA 30-0-0-2

64.056.6Avicta +37.2 GPA 30-0-0-2

63.761.3Telone + Avicta+ 24 GPA 30-0-0-2

Planted 23 AprilRoot Mean Square (RMS)Standard Deviation (S.D.)

LintYield

Net Income RMS S.D.Treatment

Test 1 - Histogram of Lint Yield – Small Plot test, 2007

Lint yield = 1029 – 1808, 74 of 96 data points were over 1500 lbs lint/A

Test 2, 2007Test 2, 2007--Helena PlantationHelena Plantation

•• Main PlotsMain Plots–– TeloneTelone II @ 3 g/A + II @ 3 g/A + AvictaAvicta Complete PacComplete Pac–– AvictaAvicta Complete PacComplete Pac

•• SubplotsSubplots–– 24, 35.2, 41.8 GPA 3024, 35.2, 41.8 GPA 30--00--00--2 applied 2 applied

sidedresssidedress

Treatments were randomized strips X 24 Treatments were randomized strips X 24 Rows, 3 repsRows, 3 reps

Helena Plantation Helena Plantation –– 3 year Rotation 3 year Rotation History and Tests History and Tests

•• 2005 2005 –– Cotton 105 ACotton 105 A –– SitespecificSitespecific N N mgt. test, analyzed using mixed model mgt. test, analyzed using mixed model technique,technique, Burris/Milliken/Willers Burris/Milliken/Willers etaletal. .

•• 2006 2006 –– Corn 105 A Corn 105 A –– sampled for rootsampled for root--knot nematodeknot nematode

•• 2007 2007 -- Cotton 33A Cotton 33A -- split plot, to split plot, to evaluate seed treatments (evaluate seed treatments (AvictaAvictaComplete Pac), fumigation (Complete Pac), fumigation (TeloneTelone II) II) and Nitrogen rates (low and Nitrogen rates (low –– Med.Med.-- High)High)

Sharkey Clay

Tensas Clay

Dundee Silty Clay Loam

Helena PlantationSoil Types

(Veris EC ZonesField 36)

Helena PlantationNDVI 2007

Severe Root-knot

2005

Soil Transition

line

Treatment

Contrasts

Helena Ptn., 33A Clean Yield Points with plots2007

ArcGis 9/GeoDa analysis1) Morans I = 0.052) Yield Range = 480.1 – 1918.73) Yield mean 1315.74) Telone II = highly significant5) Nitrogen strategy = NS

480.1

1918.7

623.9

1315.7

Lint Yield =

480.1 – 1918.7

Histogram of Lint Yield - Helena test, 2007

Lint Yield AverageHelena Test 2007

1306

1328

1340

12921284

1263

1220

1240

1260

1280

1300

1320

1340

Lint

Yie

ld

Telone* W/O Telone

80 lbs N115 lbs N135 lbs N

Test Field Surface/With Plots and Areas Of Interest – Gray scale conversion in ArcGis 9.1 shows low ECa, nematode hot-spots, poor drainage and high yield zones - Helena test, 2007

Plot 1031364 lb lint/A

Poly pipe damage

NematodeHot-spots

Plot 3011294 lb lint/A

Isolation of Low Lint Yield Points Using a Histogram Created in Arc Gis 9.1

Helena Test, 2007

Analysis of High Lint Yield (> 1300 lb lint/A) across all plots Analysis of High Lint Yield (> 1300 lb lint/A) across all plots Helena Test, 2007Helena Test, 2007

Control plots

1327

1642

1211 1140 1225 1227

0

500

1000

1500

2000

T + ACP ACP

80 lbs N 115 lbs N 135 lbs N

Lint Yield in a Low ECa Zone

Helena Test, 2007

Observations - Summary

• In a small plot test, a low rate N strategy of 80 lb N plus Telone II, failed to produce optimum cost/benefits as compared to ACP plus a high rate N strategy

• The yield range was 1022 – 1808 lbs lint/A • RMS, S.D. and IDW indicated consistent yields

for ACP and ACP plus Telone II as compared to non-treated plots

• IDW was a useful GeoStatistical tool for identifying thrips and nematode hot-spots

Observations - Summary• Analysis of lint yield in the Helena on-farm test, indicated

Telone II treatments were significant and nitrogen strategy was not significant as an average across the test

• The yields ranged from 480.1-1918.7 lbs lint/A• Analysis of lint yield within a zone found to contain low

ECa values and high nematode populations, indicated a medium rate (115 lb N) nitrogen strategy plus Telone II produced significantly higher yields as compared to other treatments

• N rate tests conducted on light soils infested with nematodes produce contrasting results with and without Telone II fumigation