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Biologoical Control <br />Parasitoid releases for the 2019 field season concluded on 9/12/2019. A total of 47,616 parasitoids were <br />released among eight sites. Dodge Nature Center was added as a release in in mid-June. Parasitoids are released <br />at a site for two field seasons to establish parasitoid populations. Of the eight release sites, 4 sites will receive <br />parasitoids in 2019 as well. Annual ash health assessments took place at 23 past and present release sites <br />between July and early September. Ash health has greatly declined in southeastern Minnesota compared to the <br />Twin Cities metro area and we are beginning to see steady decline at Hartley Park in Duluth. <br /> <br />Location <br />ĻƷƩğƭƷźĭŷǒƭ hƚĬźǒƭ {ƦğƷŷźǒƭ <br /> <br />Site <br />ƦƌğƓźƦĻƓƓźƭź ğŭƩźƌź ŭğƌźƓğĻ <br />Latitude Longitude <br /> <br />Bear Cave Park 43.85797 -92.50016 5248 900 564 <br /> <br />Elm Creek Park 45.14215 -93.42419 3646 1200 328 <br /> <br />Dodge Nature Center 44.89137 -93.09928 2018 1200 468 <br /> <br />Lincoln Park 46.76767 -92.13855 3685 900 601 <br /> <br />Frontenac State Park 44.5367 -92.34116 6045 900 863 <br /> <br />McCarthy Lake State WMA 44.25693 -91.96795 5648 900 936 <br /> <br />Blackhawk Park 44.81625 -93.18637 4394 1200 342 <br /> <br />Rice Creek Chain-County Park 45.17528 -93.10537 3923 1200 507 <br /> <br />All sites 34,607 8,400 4,609 47,616 <br />Releases in 2019 brings the total amount of parasitoids released in Minnesota to 609,249. <br /> <br />{ƦğƷŷźǒƭ ĻƷƩğƭƷźĭŷǒƭ hƚĬźǒƭ {ƦğƷŷźǒƭ <br />Year Total per year <br />ŭğƌźƓğĻ ƦƌğƓźƦĻƓƓźƭź ğŭƩźƌź ğŭƩźƌź <br />2010 0 2154 0 1172 3326 <br />2011 0 19480 3641 7596 30717 <br />2012 0 19822 10241 15258 45321 <br />2013 0 42579 8597 0 51176 <br />2014 0 34434 12062 0 46496 <br />2015 0 151022 31490 0 182512 <br />2016 1613 45130 42300 0 89043 <br />2017 2151 43245 23100 0 68496 <br />2018 4636 27310 12600 0 44546 <br />2019 4609 34607 8400 0 47616 <br />Total 13,009 419,783 152,431 24,026 609,249 <br /> <br />