Soybean Aphid Suction TrapsWhat are they, What can they tell

us?

Illinois suction trap data provided courtesy of David Voegtlin Center for Ecological Entomology

Illinois Natural History Survey

Eileen Cullen, Extension EntomologistUniversity of Wisconsin – Extension

University of Wisconsin, Madison Entomology Dept.

Photo Courtesy of David Voegtlin

Soybean Aphid Suction Trap

Eggs

Summerpopulation

Spring

Fall

Migrants

SOYBEAN

BUCKTHORN

Chris DiFonzo MSU Entomology Department

Soybean aphid suction trap.

2004 Illinois suction trap locations. Nine sites, one trap per location.

Dr. David VoegtlinUniv. of IllinoisIL Natural History Survey

Can we anticipate high soybean aphid years?

Soybean aphid eggs overwinter on Buckthorn

Soybean aphid eggs on Buckthorn

Photo by D. Voegtlin

Sept. – Oct. Trap Catch: Winged migrants (female & male) Moving from soybean to buckthorn. Size and success of this migration can influence population the following season.

Free. DeK. Mon. Urbana Perry Brown. Dixon Spr.

27 July 82 5 6 1 2 00

3 August 149 55 5 0 5 0 010 August 886 262 2 1 0 1017 August 32 21 3 0 1 0 124 August 2 0 0 0 0 1 031 August 0 1 0 0 0 0 0

7 Sept. 0 0 0 0 0 0014 Sept. 0 0 0 0 0 0 021 Sept. 5 0 0 3 0 0 028 Sept. 3 1 4 0 0 0 0

5 Oct. 2 2 0 0 0 3 012 Oct. 0 0 0 0 0 1

Illinois Suction Traps - 2001

David Voegtlin, Illinois Natural History Survey

Free. DeK. Mon. Urbana Perry Brown. Dixon Spr.

19 July 3 0 3 0 4 0 026 July 3 3 10 0 0 0 0

2 August 41 5 6 6 0 0 09 August 13 19 8 0 5 0 016 August 22 8 0 2 10 0 023 August 0 4 0 0 2 1 030 August 0 0 0 0 1 0 0

6 Sept. 0 1 0 0 0 0 013 Sept. 0 0 3 0 0 0 020 Sept. 0 0 17 0 2 0 027 Sept. 0 2 80 71 284 1 0

4 Oct. 0 38 62 13 133 1 011 Oct. 0 7 3 4 9 0 0

Illinois Suction Traps - 2002

David Voegtlin, Illinois Natural History Survey

Free. DeK. Mon. Eur. Urbana Perry Brown. D. Spr.

4 July 0 0 0 0 0 0 0 0

11July 21 1 0 0 0 0 0 0

18 July 176 131 1 2 0 0 0 0

25 July 112 940 59 142 2 4 3 1

1 August 787 6,755 71 401 9 8 1 0 8 August 1,912 4,890 569 4,920 163 232 18 015 August 1,810 286 1,403 1,090 602 1,560 1,535 31 22 August 1,347 264 2,690 921 1,131 620 4,113 229 August 26 29 209 50 215 85 1,060 67

5 Sept. 1 3 8 2 6 3 25 112 Sept. 0 0 0 0 0 0 0 019 Sept. 0 0 1 1 0 0 0 026 Sept. 0 0 0 0 0 0 0 0

3 Oct. 0 0 0 0 0 0 0 0

10 Oct. 0 0 0 3 0 2 0 017 Oct. 0 0 0 5 1 5 4

Illinois Suction Traps - 2003

David Voegtlin, Illinois Natural History Survey

Free. DeK. Jol. Mon. Eur. Urbana Perry Brown. D. Spr.

30 July 1 0 1 1 4 0 0 0 0

6 August 1 1 1 0 3 0 1 0 013 August 1 0 0 1 1 0 4 0 020 August 1 0 0 0 2 0 1 0 0 27August 0 1 1 1 1 0 0 0 0

3 Sept. 0 0 0 4 2 0 6 10

10 Sept. 3 2 0 19 15 3 12 0 017 Sept. 39 20 0 78 105 6 357 11 024 Sept. 83 26 6 16 48 7 164 41 3

1 Oct. 13 20 3 25 132 32 289 7 68 Oct. 13 4 - 2 19 3 48 15 515 Oct. 0 4 4 0 5 4 25 2 422 Oct. - - 0 0 1 - - - 3

Illinois Suction Traps - 2004

David Voegtlin, Illinois Natural History Survey

Illinois Suction Trap Trends

Fall 2001 Trap Catches Very Low2002 Growing Season low soybean aphid year

Fall 2002 Traps caught 700+ migrants2003 Growing Season high soybean aphid year

Fall 2003 Trap Catches again Very Low2004 Growing Season very low soybean aphid year

Fall 2004 Traps caught 1,765 migrants2005 Growing Season ???? Scouting will be Critical.

Suction Trap Locations Coming to WI Summer 2005!

Acknowledgements

Funding for Soybean Aphid Suction Traps Provided by:

North Central Integrated Pest Management (NCIPM)

Regional Research Coordination and Aphid Identification:

Dr. David Voegtlin, Center for Ecological Entomology Illinois Natural History Survey

Eileen CullenUW Madison Entomology DepartmentExtension Entomologist

University of WisconsinEntomology Department1630 Linden DriveMadison, WI 53706

Tel: (608) 261-1507E-mail: cullen@entomology.wisc.edu