1. Amy G. Carroll Dr. Scott Monfort Dr. Terry Kirkpatrick Michael Emerson
Utilizing Nematicide Verification Strips to Illustrate Yield Loss from Nematodes
Amy G. Carroll
Dr. Scott Monfort
Dr. Terry Kirkpatrick
Michael Emerson

2. Economics of Nematodes in Arkansas (2006)
Estimated yield losses = 5.5 % of total cotton production
Two important Nematodes in Arkansas
Meloidogyne incognita
Rotylenchulus reniformis
Meloidogyne incognita (Root-knot nematode)
Estimated 3.0 %
Rotylenchulus reniformis (Reniform nematode)
Estimated 2.5 %

3. Nematode Symptoms Galls on roots ---Root-knot Stunting Chlorosis
Abnormal root growth
Severely stressed plants may die
Kirkpatrick and Rothrock, 2001

4. Study Objective
Educate producers on root-knot nematode related damage in cotton
Utilize Precision Ag Technologies to demonstrate the within field variation in in yield loss due to root-knot nematode infection and soil parameters

5. Root-Knot Fields Assessed in 2007

6. Methods At each location: Strip comparisons
Nematicide Soil Fumigant Treated (Telone, Dow AgroSciences) 3 gal/A rate
Untreated
At least 3 replications of the strip comparisons
Yield was recorded with a Agleader Yield Monitor
Spatial maps created in SST Development GIS Software --- SSToolbox

7. Strip Yield Average Treated = 939 lbs/A Untreated = 879 lbs/A UnTrt

8. Technology Used Multi-Spectral Imagery Veris Data was taken at
was acquired throughout
the season
Veris Data was taken at
Pre-Plant
Yield Data was Collected at Harvest

9. Heavy Soil
Sandy Soil
Shallow Veris Map
1 to 12 inches

10. Heavy Soil
Sandy Soil
Deep Veris Map
12 to 36 inches

11. Verification Strip Demo
Yield Data for Entire Field

12. Average Yield Data from Zones Based on Soil Types
Trt = 842 lbs/A (a)
UnTrt = 961 lbs/A (a)
Trt = 848 lbs/A (a)
UnTrt = 712 lbs/A (b)
136 lbs/A
Trt = 995 lbs/A (a)
UnTrt = 893 lbs/A (b)
102 lbs/A
Trt = 767 lbs/A (a)
UnTrt = 674 lbs/A (a)
Trt = 1002 lbs/A (a)
UnTrt = 1005 lbs/A (a)
Trt = 924 lbs/A (a)
UnTrt = 776 lbs/A (b)
148 lbs/A
Trt = 1021 lbs/A (a)
UnTrt = 1034 lbs/A (a)
Average Yield Data from Zones Based on Soil Types

13. Conclusion
Response to nematicide application was more effective on sandy soil types than heavier soil types.
This site-specific approach has the potential to reduce the amount of chemical required
Technology to do this and readily available to all farmers.

14. Special Thanks
Mr. James Thomas
Wildy Farm
Bonds Farm
Dow AgroSciences