Proposed Registration of Sulfoxaflor for Use on Agricultural Crops ...
Safety of sulfoxaflor and flupyradifurone for aphid predators
-
Upload
jennifer-blackburn -
Category
Education
-
view
110 -
download
0
Transcript of Safety of sulfoxaflor and flupyradifurone for aphid predators
![Page 1: Safety of sulfoxaflor and flupyradifurone for aphid predators](https://reader036.fdocuments.in/reader036/viewer/2022062823/587701501a28ab890e8b4763/html5/thumbnails/1.jpg)
Safety of sulfoxaflor and flupyradifurone for aphid predators
J.P. MichaudKansas State University
Sorghum – Sugarcane Aphid Research Exchange Meeting
New Orleans, LAJanuary 7 – 8, 2016
![Page 2: Safety of sulfoxaflor and flupyradifurone for aphid predators](https://reader036.fdocuments.in/reader036/viewer/2022062823/587701501a28ab890e8b4763/html5/thumbnails/2.jpg)
Introduction
• Sulfoxaflor (Dow) and flupyradifurone (Bayer)are both effective against SCA
• How safe are they for predators expected to contribute to biocontrol of SCA?
• We tested Hippodamia convergens with multiple routes of exposure to both(topical, residual, feeding contaminated food)
• We started with recommended field rates (1 oz and 8 oz / acre, application in 10 gal H2O)
• We also reared out survivors to check forsublethal and transgenerational effects
![Page 3: Safety of sulfoxaflor and flupyradifurone for aphid predators](https://reader036.fdocuments.in/reader036/viewer/2022062823/587701501a28ab890e8b4763/html5/thumbnails/3.jpg)
Materials & Methods
• Topical exposure: Known volume of materialapplied to dorsum of adult or 4th instar
• Residue exposure: Application to leaf disc-> 24 h exposure of 1st instar larvae
• Consumption: Aphids sprayed with aphicide,fed to 4th instar larvae
• Mortality tallied after 24 h – survivors matedand reproduction observed
• High mortality – 0.1 X dose tested• Low mortatily – 2.0 X dose tested
![Page 4: Safety of sulfoxaflor and flupyradifurone for aphid predators](https://reader036.fdocuments.in/reader036/viewer/2022062823/587701501a28ab890e8b4763/html5/thumbnails/4.jpg)
Surv
ival
(%, 2
4 h)
Treatment
Topical application to adult H. convergens
Control Sulfoxaflor (1x) Sulfoxaflor (2x) Flupyradifurone (0.1x)
Flupyradifurone (1x)
0
20
40
60
80
100a a
a
b
a
*There were no significant effects on the reproductive performance of survivors
* * * *
![Page 5: Safety of sulfoxaflor and flupyradifurone for aphid predators](https://reader036.fdocuments.in/reader036/viewer/2022062823/587701501a28ab890e8b4763/html5/thumbnails/5.jpg)
Topical application to 4th instar H. convergensSu
rviv
al (%
adu
lts)
Control
Sulfo
xaflor (
1x)
Sulfo
xaflor (
2x)
Flupyradifu
rone (0
.1x)
Flupyradifu
rone (1
x)0
20
40
60
80
100
a
ab
b
c
c
Treatment
![Page 6: Safety of sulfoxaflor and flupyradifurone for aphid predators](https://reader036.fdocuments.in/reader036/viewer/2022062823/587701501a28ab890e8b4763/html5/thumbnails/6.jpg)
H. convergens larvae (1st instar) with 24 hexposure to leaf residues
Control
Sulfo
xaflor (1
x)
Sulfo
xaflor (2
x)
Flupyradifu
rone (
0.1x)
Flupyradifu
rone (1
x)0
20
40
60
80
100
Surv
ival
(% a
dults
)
Treatment
a
b
bcc
![Page 7: Safety of sulfoxaflor and flupyradifurone for aphid predators](https://reader036.fdocuments.in/reader036/viewer/2022062823/587701501a28ab890e8b4763/html5/thumbnails/7.jpg)
H. convergens adults fed contaminated prey (24 h)(surviving adults reproduced normally)
Treatment
Control
Sulfo
xaflor (1
x)
Sulfo
xaflor (
2x)
Flupyradifu
rone (0
.1x)
Flupyradifu
rone (1
x)0
20
40
60
80
100
Surv
ival
(%, 5
day
s)
a
b b
c
d
![Page 8: Safety of sulfoxaflor and flupyradifurone for aphid predators](https://reader036.fdocuments.in/reader036/viewer/2022062823/587701501a28ab890e8b4763/html5/thumbnails/8.jpg)
H. convergens larvae (4th) fed contaminated prey (24 h)(surviving adults reproduced normally)
Control Sulfoxaflor (1x) Sulfoxaflor (2x) Flupyradifurone (0.1x)
Flupyradifurone (1x)
0
20
40
60
80
100
a
b
bc
b
c
Surv
ival
(% a
dults
)
Treatment
![Page 9: Safety of sulfoxaflor and flupyradifurone for aphid predators](https://reader036.fdocuments.in/reader036/viewer/2022062823/587701501a28ab890e8b4763/html5/thumbnails/9.jpg)
Key Learnings• Sulfoxaflor is relatively safe for H.
convergens• Flupyradifurone is moderately
toxic, but probably less so than most conventional alternatives
• Highest risk is for early instar larvae contacting leaf residues• No apparent sublethal effects of either material