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BIOLOGICAL CONTROL <br /> <br /> Parasitoid releases for the 2018 field season concluded on 9/12/2018. A total of 44,656 parasitoids were <br />released among seven sites. Of the seven release sites, 4 sites will receive parasitoids in 2019 as well. <br />Location <br />Oobius <br />Tetrastichus Spathius Total <br />agrili <br />Site LatitudeLongitude planipennisi galinae Released <br />- <br />Bear Cave Park43.85797392.500159 4975 3400 918 9293 <br />- <br />Elm Creek Park 45.14214993.424193 2813 1000 237 4050 <br />- <br />Hartley Park 46.83917292.095684 3828 1800 633 6261 <br />- <br />Lincoln Park 46.76766692.138548 4588 1800 606 6994 <br />MN Valley Nat'l Wildlife - <br />Refuge 44.85824393.218146 3785 1600 877 6262 <br />- <br />Reservoir Woods 45.00170993.133568 4065 1600 968 6633 <br />Rice Creek Chain-County - <br />Park 45.17527893.105373 3256 1400 397 5053 <br />All sites 27,31012,600 4,63644546 <br /> <br /> Releases in 2018 brings the total amount of parasitoids released to 561,633. This year marked the most Spathius <br />galinae released since it was initially released in MN during the summer of 2016. <br /> <br />Spathius Tetrastichus Oobius Spathius <br /> <br />Year galinae planipennisi agriliagrili Total per year <br /> <br />2010 0 2154 0 1172 3326 <br /> <br />2011 0 19480 36417596 30717 <br /> <br />2012 0 19822 10241 15258 45321 <br /> <br />2013 0 42579 85970 51176 <br /> <br />2014 0 34434 12062 0 46496 <br /> <br />2015 0 15102231490 0 182512 <br /> <br />2016 1613 45130 42300 0 89043 <br /> <br />2017 2151 43245 23100 0 68496 <br /> <br />2018 4636 27310 12600 0 44546 <br /> <br /> <br />Total8,400385,176 144,03124,026 561,633 <br /> <br /> <br /> Yellow pan traps were placed at 4 locations from 5/29 through 9/13 to monitor for Tetrastichus planipennisi. <br />Traps were serviced once a week which resulted in 1,489 samples collected over the summer. Suspected <br />parasitoids have been screened and 58 samples were sent for official identification by Dr. Juli Gould with the <br />USDA. <br /> <br /> <br />Location <br /> <br />Site Latitude LongitudeTraps Set <br /> <br />Fort Snelling 44.886509 -93.1840430 <br /> <br />43.946326 -91.40624 <br />Great River Bluffs 17 <br />Prairie Island 44.076801 -91.682671 30 <br />Wheelock Parkway44.988560 -93.112828 30 <br />25 <br /> <br />