1. Efficacy of Neonicotinoid
Seed Treatments on SCA
David Kerns
Louisiana State University - AgCenter
Sorghum – Sugarcane Aphid
Research Exchange Meeting
New Orleans, LA
January 7 – 8, 2016
2. Collaborators
Name Affiliation Trial Location
Mo Way Texas A&M University Beaumont, TX
Mike Brewer Texas A&M University Corpus Christi, TX
Glenn Studebaker University of Arkansas ??
Gus Lorenz University of Arkansas ??
Scott Stewart University of Tennessee Jackson, TN
Angus Catchot Mississippi State University Starkville, MS
Jeff Gore Mississippi State University Stoneville, MS
Alana Jacobson Auburn University Tallassee & Fairhope, AL
Moneen Jones University of Missouri Portageville, MO
Tom Royer Oklahoma State University ??
Julien Beuzelin Louisiana State University Alexandria, LA
David Kerns Louisiana State University Winnsboro, LA
David Buntin University of Georgia Midville & Griffin Bledsoe, GA
3. Objectives
• Evaluate if neonicotinoid seed
treatments offer early-season
control of SCA.
• Determine length of activity of
neonicotinoid seed treatments on
SCA.
4. Winnsboro, LA - 2014
Aphidsperplant
0
20
40
60
80
100
120
140
160
180
Aphidsperleaf
0
50
100
150
200
250
300
19 DAP
26 DAP
33 DAP
40 DAP
G
aucho
6.4
m
g-ai
Poncho
6.4
m
g-aiN
ipsit6.4
m
g-aiC
ruiser7.6
m
g-ai
U
ntreated
G
aucho
6.4
m
g-ai
Poncho
6.4
m
g-aiN
ipsit6.4
m
g-aiC
ruiser7.6
m
g-ai
U
ntreated
Primarily alates
6. Winnsboro, LA - 2014
Winnsboro, LA 2014
G
aucho
6.4
Poncho
6.4
N
ipsit6.4
C
ruiser7.6
U
ntreated
Seedmaturity(1-3scale)
1.0
1.5
2.0
2.5
3.0
1 = Milk, 2= Soft dough, 3 = Hard dough
a
ab
c
ab
bc
85 DAP
7. Winnsboro, LA - 2015
Seed Treatment (fl-oz/cwt)
G
aucho
6.4
Poncho
6.4
N
ipsit 6.4
C
ruiser 7.6
U
ntreated
Aphidsperplant
0
20
40
60
80
100
120
140
160
180
17 DAP
24 DAP
31 DAP
a
b
b b b
a
a
a
a
a
a
a a a a
8. Midville, GA - 2015
Buntin – University of Georgia
Seed Treatment (fl-oz/cwt)
G
aucho
6.4
Poncho
6.4
N
ipsit6.4
C
ruiser7.6
U
ntreated
Aphidsperplant
0
100
200
300
400
22 DAP
36 DAP
51 DAP
ab
b b
b
a
a
a
a
a
a
a a a
a
Midville, GA 2015
9. Jackson, TN - 2015
Stewart, University of Tennessee
Seed Treatment (fl-oz/cwt)
G
aucho
6.4
Poncho
6.4
N
ipsit6.4
C
ruiser7.6
U
ntreated
Aphidsper3row-ft
0
100
200
300
400
500
600
14 DAP
19 DAP
39 DAP
b b b
b
a
a
a
a
a
a
bb
Jackson, TN 2015
b
a
a
10. Starkville, MS - 2015
Catchot, Mississippi State University
Starkville, MS 2015
G
aucho
6.4
Poncho
6.4
N
ipsit6.4
C
ruiser7.6
U
ntreated
Yield(bu/ac)
80
85
90
95
100
a a
ab
ab
b
11. Key Results
• All neonicotinoid seed treatments
offer good early-season protection
from SCA.
• Residual activity will vary, ~24-40
days.
• More important on late-planted
sorghum
• Neonicotinoid seed treatments
offer benefit beyond early SCA
control.
