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Utilizing Nematicide Verification
Strips to Illustrate Yield Loss from
Nematodes
Amy G. Carroll
Dr. Scott Monfort
Dr. Terry Kirkpatrick
Michael Emerson
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 %
Nematode Symptoms
Galls on roots ---Root-knot
Stunting
Chlorosis
Abnormal root growth
Severely stressed plants may
die
Kirkpatrick and Rothrock, 2001
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
Root-Knot Fields Assessed in 2007
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
UnTrt
Strip Yield Average
Treated = 939 lbs/A
Untreated = 879 lbs/A
Technology Used
Veris Data was taken at
Pre-Plant
Multi-Spectral Imagery
was acquired throughout
the season
Yield Data was Collected at Harvest
Shallow Veris Map
1 to 12 inches
Heavy Soil
Sandy Soil
Deep Veris Map
12 to 36 inches
Heavy Soil
Sandy Soil
Verification Strip Demo
Yield Data for Entire Field
Trt = 842 lbs/A (a)
Trt = 995 lbs/A (a)
Trt = 1002 lbs/A (a)
Trt = 1021 lbs/A (a)
UnTrt = 961 lbs/A (a)
UnTrt = 893 lbs/A (b)
UnTrt = 1005 lbs/A (a)
UnTrt = 1034 lbs/A (a)
102 lbs/A
Trt = 848 lbs/A (a)
Trt = 767 lbs/A (a)
Trt = 924 lbs/A (a)
UnTrt = 712 lbs/A (b)
UnTrt = 674 lbs/A (a)
UnTrt = 776 lbs/A (b)
136 lbs/A
148 lbs/A
Average Yield Data from Zones Based on Soil Types
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.
Special Thanks
Mr. James Thomas
Wildy Farm
Bonds Farm
Dow AgroSciences