efficacy of neonicotinoid seed treatments
TRANSCRIPT
Efficacy of Neonicotinoid Seed Treatments on SCA
David KernsLouisiana State University - AgCenter
Sorghum – Sugarcane Aphid Research Exchange Meeting
New Orleans, LAJanuary 7 – 8, 2016
CollaboratorsName 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
Objectives
• Evaluate if neonicotinoid seed treatments offer early-season control of SCA.
• Determine length of activity of neonicotinoid seed treatments on SCA.
Winnsboro, LA - 2014
Aphids per plant
0
20
40
60
80
100
120
140
160
180
Aphids per leaf
0
50
100
150
200
250
300
19 DAP 26 DAP 33 DAP 40 DAP
Gaucho 6.4 mg-ai
Poncho 6.4 mg-ai
Nipsit 6.4 mg-ai
Cruiser 7.6 mg-ai
UntreatedGaucho 6.4 mg-ai
Poncho 6.4 mg-ai
Nipsit 6.4 mg-ai
Cruiser 7.6 mg-ai
Untreated
Primarily alates
Winnsboro, LA - 2014
Winnsboro, LA - 2014Winnsboro, LA 2014
Gaucho 6.4
Poncho 6.4
Nipsit 6.4
Cruiser 7.6
Untreated
Seed maturity (1-3 scale)
1.0
1.5
2.0
2.5
3.01 = Milk, 2= Soft dough, 3 = Hard dough
a
ab
c
abbc
85 DAP
Winnsboro, LA - 2015
Seed Treatment (fl-oz/cwt)
Gaucho 6.4
Poncho 6.4
Nipsit 6.4
Cruiser 7.6
Untreated
Aphids per plant
0
20
40
60
80
100
120
140
160
180
17 DAP 24 DAP 31 DAP
ab b b b
a
aa
a
a
aa a a a
Buntin – University of Georgia
Midville, GA - 2015
Seed Treatment (fl-oz/cwt)
Gaucho 6.4
Poncho 6.4
Nipsit 6.4
Cruiser 7.6
Untreated
Aphids per plant
0
100
200
300
400
22 DAP 36 DAP 51 DAP
abb b
b
a
a
a
a
a
a
a a a
a
Midville, GA 2015
Stewart, University of Tennessee
Jackson, TN - 2015
Seed Treatment (fl-oz/cwt)
Gaucho 6.4
Poncho 6.4
Nipsit 6.4
Cruiser 7.6
Untreated
Aphids per 3 row-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
aa
Catchot, Mississippi State University
Starkville, MS - 2015Starkville, MS 2015
Gaucho 6.4
Poncho 6.4
Nipsit 6.4
Cruiser 7.6
Untreated
Yield (bu/ac)
80
85
90
95
100
a a
abab
b
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.
Discussion