distribution and management of spotted wing drosophila in florida berry crops
TRANSCRIPT
Oscar E . L iburd
P ro f e s s o r o f F r u i t a n d Ve g . E n t o m o l o gy
U n i ve r s i t y o f F l o r i d a
Distribution and management of
spotted wing drosophila in
Florida berry crops
SWD Global Impact
North America:
Canada
US > $2 B Mexico
Central America:
Costa Rica
Asia:
Japan $500 M China
Thailand
Taiwan
North & South Korea
Pakistan
Russian Far East
Myanmar
India
Europe: > $4 B Spain
France
Italy
Germany
Austria
Slovenia
Switzerland
Croatia
Belgium
S. America:
Ecuador
First Record of SWD in Florida
• First recorded in 2009 in
in Hillsborough Co.
• > 28 Counties infested
• Economic losses in small
fruits in 2013 was ~35 M
Spotted Wing Drosophila (SWD)
• Family Drosophilidae
• “Vinegar flies”
• “Fruit flies”
• “Pomace flies”
• Male
• Dark spots on wings
• Two bands on forelegs
• Female
• Serrated ovipositor
• No wing spots
Male SWD Female SWD
http
://exte
nsio
n.psu
.edu/
vegeta
ble
-fru
it/fa
ct-
sheets
/sp
otted-w
ing-d
roso
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SWD Lifecycle
http
://je
nny.tfr
ec.
wsu
.edu/
opm
/galle
ry.p
hp?p
n
=165
Egg 1-3 days
Larvae 5-7 days
Pupae 4-15 days
Adult 21- 63 days*
Oviposition 1-2 days
Fecundity 200-600 eggs
Monitoring
Correct Identification
Understanding
Host Ecology &
Biology
Use of
Cultural techniques
Implementation of
reduced-risk
pesticides
Integrated Pest Management (IPM) for SWD
Surveying for SWD in Strawberries (2014)
3-5 SWD traps were
placed in strawberry
fields
Traps were placed either
on the border of fields
or in the center
Traps were serviced
biweekly
O. Liburd
L. Iglesias
Farms Mean Number of SWD per trap
February 10 February 24 March 10 March 24 Mean
A 0 0 0 0 0
B 1. 7 0 0 0.5 0.6
C 0 0 0 0.5 0.1
D 10 0.7 0 0.8 2.9
E 0 0.3 0 4.4 1.2
F 0 0 0 0 0
G 0 0 0 0 0
H 4.3 0.7 0 2.1 1.8
I 0 0 0 0 0
J 0 0 0 0 0
K 0 6.2 0 3.1 2.3
L 0.3 0 0 0 0.1
M 2.3 0.3 0 0.4 0.8
N 0.3 2.1 0 1.8 1.5
O 0 3.2 0 0.5 0.9
P 1.5 0 0 0.2 0.4
Captures of SWD in strawberry fields in Plant City, FL 2014
Effectiveness and Longevity of Insecticides Residues on
SWD – field-based bioassays
Insecticdes evaluated:
Radiant® SC (spinetoram)
Entrust® (spinosad)
Malathion
Exirel® (cyantraniliprole)
Apta™ (tolfenpyrad)
Pyganic EC 5.0 (pyrethrin) 4 replicates in a RCBD
Plo
t size
20 f
t x 2
0 f
t
Mortality of adult SWD after exposure to strawberry
leaves and fruit 3 d after treatment (2014)
Treatment
Leaf: F = 41.90; P <0.0001
Fruit: F = 89.54; P <0.0001
3h-DAT
IPM-compatible insecticides for SWD control in strawberries
F = 55.92; P <0.0001
Not registered for use in
strawberries
48h DAT
Larval Recovery after Insecticide Treatment
Discussion and Conclusions
• Flies are abundant in > 50% of the strawberry fields
surveyed
• The suzukii bait in Trece traps was equally attractive
to SWD as the yeast-sugar bait
• Entrust, Radiant, Exirel and Malathion were equally
effective in killing flies
• Apta and PyGanic were ineffective in reducing SWD
larvae in fruit
Acknowledgements
UF Fruit & Vegetable IPM Lab
Grad. Students
Lindsy Iglesias
Janine Razze
Chris Crockette
Tamika Garrick
Tola Dosunmu
Post-Docs
Teresia Nyoike
Elena Rhodes