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Landscape Effects on Spotted Wing Drosophila Infestation in Raspberries Emma Pelton MSc. Candidate Agroecology & Entomology University of Wisconsin—Madison. Why does landscape matter?. Why does landscape matter?. Why does landscape matter?. Why does landscape matter?.
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Landscape Effects on Spotted Wing Drosophila Infestation in RaspberriesEmma PeltonMSc. Candidate Agroecology & EntomologyUniversity of Wisconsin—Madison
Why does landscape matter? Wooded landscapes may provide: • Overwintering habitat • Alternate host plants
Woodland Alternate Hosts • Snowberry • Elderberry • Pokeweed • Honeysuckle • Dogwood • Brambles • Bittersweet nightshade • Others (still to be confirmed)
Do farms in heavily wooded landscapes experience earlier infestationandhigher infestation?
Selecting Study Farms • Low-to-high woodland landscapes • Pest management strategies • Varieties (summer and fall-bearing raspberries) • Size (<0.25 – 20 acres)
Identifying Alternate Hosts • 100m transect along woodland edge • Presence/ absence of alternate hosts
The Math 18 farms
The Math 18 farms X 9 traps
The Math 18 farms X 9 traps X 20 weeks
The Math 18 farms X 9 traps X 20 weeks A lot of samples
Do farms in heavily wooded landscapes experience earlier infestation and higher infestation?
Higher Infestation Photo: Hannah Burrack
Larval Infestation Salt Tests Purpose: Establish trap catch and larval infestation correlation Methods: Collected100g of ripe, marketable fruit Salt-water test Counted all 1-3rd instar larvae Photo: Phil Pellitteri
Next Steps • Completing samples • Analyzing data for landscape factors: farm vs. large-scale, woodland area vs. edge • Other factors: Management, Degree Days
Summer 2014 Repeat study: • 5 Wisconsin farms • 5 Minnesota farms • 5 Michigan farms
Summer 2014 Cold-Hardy Grape Variety Experiments: • SWD choice and preference tests • SWD field monitoring (sign up!)
With the help of… Participating Growers and the Wisconsin Berry Growers Association Advisors: Dr. Claudio Gratton& Dr. Christelle Guédot Technicians: Caitlin Bergstrom, Tressa Franzmeier, Kiley Friedrich, Ian McCririe, and Aila Murphy Michael Stocking, Friends, and Family Labmates in the Gratton and Guédot labs Funding: • USDA North Central Region— Regional Integrated Pest Management Program: Research & Extension Grant • Center for Integrated Agricultural Systems Mini-Grant
Stay Tuned… Updates through: • WBGA • Contact me: Emma Pelton pelton@wisc.edu • UW SWD website http://labs.russell.wisc.edu/swd/