Oscar%20E.%20Liburd

1
Distribution and Management of Spotted Wing
Drosophila in Florida Berry Crops

• Oscar E. Liburd
• Professor of Fruit and Veg. Entomology
  University of Florida

2
Objectives

• Create an awareness of SWD prevalence on fruit
  crops
• To teach hands-on skills in identifying,
  monitoring and managing SWD populations in berry
  crops
• To create an opportunity for open discussions
  with industry representatives, extension agents
  and growers
• Inform growers of the available resources for
  managing SWD

3
SWD Global Impact
Europe gt 4 B Spain France Italy Germany Austria
Slovenia Switzerland Croatia Belgium
North America Canada US gt 2 B Mexico Central
America Costa Rica
Asia Japan 500 M China Thailand Taiwan North
South Korea Pakistan Russian Far
East Myanmar India
S. America Ecuador
4
First Record of SWD in Florida

• First recorded in 2009 in
• in Hillsborough Co.
• gt 28 Counties infested
• Economic losses in small fruits in 2013 was 35 M

5
Spotted Wing Drosophila (SWD)
Male SWD
Female SWD

• Family Drosophilidae
• Vinegar flies
• Fruit flies
• Pomace flies
• Male
• Dark spots on wings
• Two bands on forelegs
• Female
• Serrated ovipositor
• No wing spots

http//extension.psu.edu/vegetable-fruit/fact-shee
ts/spotted-wing-drosophila
6
SWD Lifecycle
http//jenny.tfrec.wsu.edu/opm/gallery.php?pn165
Egg 1-3 days
Pupae 4-15 days
Larvae 5-7 days
Adult 21- 63 days Oviposition 1-2 days Fecundity
200-600 eggs
7
SWD Survey 2012-2014 Blueberry Seasons
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Captures of SWD in strawberry fields in
Hillsborough Co., FL 2014
Farms Mean Number of SWD per trap Mean Number of SWD per trap Mean Number of SWD per trap Mean Number of SWD per trap 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
9
Captures of SWD in strawberry fields in Bradford
Co., FL 2014
Bradford County
10
Movement SWD population from woodlands into
blueberry plantings
F 52.84 df 1, 141, P lt 0.0001
11
SWD population dynamics throughout the year
O. Liburd
Major hosts Black night shade, Wild blackberry,
Wild grapes (Vitis sp), Sparkleberry (Vaccinium
arboreum), Holly (Ilex sp), Fraser Photinia
(Photinia x fraseri)
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New baits and traps for 2015
Trece trap
No price yet
8.25
Case for 74.95
T. Nyoike
0.5
T. Nyoike
Entry holes on the trap
Suzukii Bait very specific
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Modifications in our trap design
SWD traps
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Trece trap and SWD bait/lure evaluation
T. Garrick
Trece trap
Pherocon SWD Lures
Suzukii bait
4.50 a pair
Locally made trap

• Treatments
• Yeast sugar water in Trece traps
• Yeast sugar water in regular traps
• Suzukii bait in Trece traps
• Suzukii bait in regular traps
• Pherocon Lures soapy water

www. greatlakesipm.com 1-800-235-0285
15
Baits pherocon Lures performance
F 7.67 df 4, 72, P lt0.0001
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New Insecticide Tool for SWD

• EXIREL insecticide
• Active ingredient - cyantraniliprole
• Group 28 insecticide
• Belongs to the chemical class of anthranilic
  diamides
• Depletes calcium in the cells preventing muscle
  contraction

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IPM-compatible insecticides for SWD control
48h DAT
18
Developing a Rotational Spray Program for SWD
Trt No. Spray 1 Spray 2 Spray 3 Spray 4
1 Delegate Malathion Mustang Mustang
2 Delegate Imidan Malathion Malathion
3 Danitol Delegate Malathion Malathion
4 Malathion Delegate Hero Hero
5 Delegate Cyazypyr Cyazypyr Delegate
6 Entrust Entrust Pyganic Pyganic
7 Control Control Control Control
Compounds with long PHIs were applied before
start of the harvesting period
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Discussion and Conclusions

• Flies were abundant in all of the blueberry sites
  (except 1) surveyed
• gt 50 of the strawberry fields were infested with
  SWD
• The suzukii bait in Trece traps was equally
  attractive to SWD as the yeast-sugar bait
• Exirel performed as well or better than other
  standards in reducing SWD population

20
Acknowledgements

• FDACS Specialty Crop Block Grant
• FL Strawberry Growers Association (FSGA)
• Walmart Foundation
• Participating Growers (Alto Straughn)

UF Fruit Vegetable IPM Lab
Grad. Students Lindsy Iglesias Chris
Crockette Tamika Garrick Tola Dosunmu Post-Doc
s Janine Razze Elena Rhodes Shweta Sharma


Oscar E. Liburd oeliburd_at_ufl.edu http//entnemdept
.ufl.edu/liburd/fruitnvegipm [phone] Tel.