Total Landscape Care Digital Magazine
Issue link: http://read.dmtmag.com/i/132471
chemical care Western swing Hopes of completely eradicating the EAB in North America have dwindled during the past decade. Despite very effective insecticides, their ability to infest trees with very few symptoms will continue to ensure their progression. Text info to 205-289-3796 or visit TLCrequest.com photo: Kenneth R. Law, USDA APHIS PPQ, Bugwood.org "Even with the best detection methods we have, it's just too difficult to find the newest infestations because there are no symptoms," McCullough says. "If you treated lots and lots of trees in a new area, you'd really slow them down, but there will always be trees that you didn't know had them. They are too good at building their populations. Total eradication is just not an objective anymore." There is no limit to how far west they might go, either. Research on ash species in the western United In most areas with EAB, quarantines exist that prohibit moving firewood, which could States revealed there are no species help slow the spread of EAB. there that are resistant to EAB. "In Make sure, though, that the tree is healthy enough other words, the species that are being hammered to sustain the treatment. If it's already in decline, in the East are also being used in landscapes in the the treatment likely will not work. West. Plus, ash species that are native to the West "In our studies, and in studies by other univeralso look like they can be colonized by EAB and sities, with emamectin benzoate (TREE-äge) we probably killed." tlc are seeing up to three years of almost 100-percent control. Other products have to be applied every year. Dinotefuran (Zylam) can also be extremely effective, specifically on smaller trees, but it won't get you 100-percent control," McCullough says. With any insecticide you choose, know once you see symptoms, you don't have a lot of time to get the treatment on the tree. j u n e 2013 TLC0613_ChemCare.indd 51 TotalLa nd s ca p e C a re . c o m 51 5/23/13 3:51 PM