1. Soybean Aphid Suction Traps What 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 Entomologist University of Wisconsin – Extension University of Wisconsin, Madison Entomology Dept.

2. Photo Courtesy of David Voegtlin Soybean Aphid Suction Trap

3. Eggs Summer population Spring Fall Migrants SOYBEAN BUCKTHORN Chris DiFonzo MSU Entomology Department

4. Soybean aphid suction trap. 2004 Illinois suction trap locations. Nine sites, one trap per location. Dr. David Voegtlin Univ. of Illinois IL Natural History Survey Can we anticipate high soybean aphid years?

5. 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.

6. Free. DeK. Mon. Urbana Perry Brown. Dixon Spr. 27 July 82 561200 3 August 149 5550500 10 August 886 26221010 17 August 32 2130101 24 August 2 000010 31 August 0 100000 7 Sept. 0 000000 14 Sept. 0 000000 21 Sept. 5 003000 28 Sept. 3 140000 5 Oct. 2 200030 12 Oct. 0 00001 Illinois Suction Traps - 2001 David Voegtlin, Illinois Natural History Survey

7. Free. DeK. Mon. Urbana Perry Brown. Dixon Spr. 19 July 3 0 3 0 4 0 0 26 July 3 3 10 0 0 0 0 2 August41 5 6 6 0 0 0 9 August13 19 8 0 5 0 0 16 August22 8 0 2 10 0 0 23 August 0 4 0 0 2 1 0 30 August 0 0 0 0 1 0 0 6 Sept. 0 1 0 0 0 0 0 13 Sept. 0 0 3 0 0 0 0 20 Sept. 0 0 17 0 2 0 0 27 Sept. 0 2 80 71 284 1 0 4 Oct. 0 38 62 13 133 1 0 11 Oct.0 7 3 4 9 0 0 Illinois Suction Traps - 2002 David Voegtlin, Illinois Natural History Survey

8. Free. DeK. Mon. Eur. Urbana Perry Brown. D. Spr. 4 July 000 0 0 0 0 0 11July 2110 0 0 0 0 0 18 July 176 1311 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 0 15 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 2 29 August 26 29 209 50 215 85 1,060 67 5 Sept.138 2 6 3 25 1 12 Sept.0000 0 0 0 0 19 Sept.0011 0 0 0 0 26 Sept.0000 0 0 0 0 3 Oct.000 0 0 0 0 0 10 Oct.000 3 0 2 0 0 17 Oct.000 5 1 5 4 Illinois Suction Traps - 2003 David Voegtlin, Illinois Natural History Survey

9. Free. DeK. Jol. Mon. Eur. Urbana Perry Brown. D. Spr. 30 July1 0 1 1 4 0000 6 August1 1 1 0 3 0100 13 August1 0 0 1 1 0400 20 August1 0 0 0 2 010 0 27August0 1 1 1 1 0000 3 Sept.0 0 0 4 2 0610 10 Sept. 3 2 0 19 15 3 1200 17 Sept. 39 20 0 78 105 6 357 11 0 24 Sept. 83 26 6 16 48 7 164 41 3 1 Oct. 13 20 3 25 132 32 289 76 8 Oct. 13 4 - 2 19 3 48 15 5 15 Oct. 0 4 4 0 5 4 25 2 4 22 Oct. - - 0 0 1 - - - 3 Illinois Suction Traps - 2004 David Voegtlin, Illinois Natural History Survey

10. Illinois Suction Trap Trends Fall 2001 Trap Catches Very Low 2002 Growing Season low soybean aphid year Fall 2002 Traps caught 700+ migrants 2003 Growing Season high soybean aphid year Fall 2003 Trap Catches again Very Low 2004 Growing Season very low soybean aphid year Fall 2004 Traps caught 1,765 migrants 2005 Growing Season ???? Scouting will be Critical.

11. Suction Trap Locations Coming to WI Summer 2005!

12. 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

13. Eileen Cullen UW Madison Entomology Department Extension Entomologist University of Wisconsin Entomology Department 1630 Linden Drive Madison, WI 53706 Tel: (608) 261-1507 E-mail: cullen@entomology.wisc.edu