I have always found thick woods a little intimidating, for they are so secret and enclosed. You may seem alone but you are not, for there are always eyes watching you. All the wildlife of the woods, the insects, birds, and animals, are well aware of your presence no matter how softly you may tread, and they follow your every move although you cannot see them. - Thalassa Cruso
READ THE LATEST FROM THE ARBOR DOCTOR
For the latest in Emerald Ash Borer Education and updates, visit our EAB Blog
Les Fultz with Cincinnati Maintenance interviews Ron Rothaas with Arbor Doctor about the damaging effects of the Emerald Ash Borer on the eco-system.
An exciting new treatment which has shown a high degree of success in the treatment of Emerald Ash Borer has now been registered for use in Ohio and Michigan. Arbor Doctor is utilizing this material as a part of our arsenal.
Please remember that while several companies have been talking excitedly about this product, it is not the only effective EAB treatment and is one of several tools in our toolbox. One advertising campaign I have heard indicates that other treatment methods and soil drenching are in-effective. This is simply not true.
Treatments of any type will be more useful in preserving the trees if combined with other plant health care measures such as root zone aeration, low nitrogen fertilization, and proper watering. All trees benefit from occasional, deep watering during droughts. Please remember that ash does not tolerate continually wet soils and may become pre-disposed to failure if over-watered. Arbor Doctor's EAB treatment program includes a guarantee IF the treatments are combined with these other plant health care measures.
Guaranteed!
Arbor Doctor Emerald Ash Borer Treatment
Arbor Doctor is offering a five (5) year guarantee on Emerald Ash Borer treatment costs if the treatments are combined with other plant health care elements such as vertical mulching the first year and fertilization the following four years of the guarantee period. If the tree dies during that five year period due primarily to EAB, we will refund the treatment cost (excluding the cost of vertical mulching and fertilization).
For the latest in Emerald Ash Borer Education and updates, visit our EAB Blog
Homeowners, arborists and tree-care professionals can now access unbiased, science-based information to determine whether or not to treat ash trees for emerald ash borer (EAB), which insecticide may be better suited for a particular tree, and when and how treatments should be made for best results.
The new guidelines and a summary of trial results are included in "Insecticide Options for Protecting Ash Trees from Emerald Ash Borer," a bulletin co-authored by entomologists with Ohio State University, Michigan State University, Purdue University, University of Wisconsin-Madison, and University of Illinois at Urbana-Champaign.
The bulletin is available online at"Fact Sheets/Bulletins" (click on "Fact Sheets/Bulletins"). If you don't have Internet access, contact your local OSU Extension office for assistance.
An invasive insect first found in North America in 2002, EAB has destroyed millions of ash trees in Ohio and neighboring states. So far, the voracious beetle which only attacks true ash trees in the Fraxinus genus has been confirmed in 12 Midwestern and eastern U.S. states and in two Canadian provinces.
"Our understanding of how EAB can be managed successfully with insecticides has increased substantially in recent years," said lead author Dan Herms, an entomologist with the Ohio Agricultural Research and Development Center (OARDC) and OSU Extension. "There are effective treatments available for both professionals and do-it-yourselfers, including some that are applied in the soil, injected in the trunk of the tree, or sprayed on the trunk, branches or foliage."
But before rushing to the garden center or contracting a professional applicator, Herms said, homeowners should first consider their proximity to EAB infestations, how much damage EAB has done to their trees, their budget and how much they value their ash trees.
Location is important for determining whether and when to begin treating. If your property is within a county that has been quarantined for EAB, your ash trees are probably at risk of becoming infested. Similarly, if your trees are outside a quarantined county but within 10-15 miles of a known EAB infestation, they may also be at risk. However, if your trees are more than 15 miles from the nearest infestation, it is probably too early to begin insecticide treatments.
So far, half of Ohio's 88 counties have been quarantined because of EAB. For the latest information on quarantines and maps, go toOhio Department of Agriculture Emerald Ash Borer Program Site or call (888) OHIO-EAB. If your ash tree is already infested and has lost more than 50 percent of its canopy, Herms said, it is probably too late to try to save it. Even when treatment is started early in the infestation, signs of improvement may not show until the second year of treatment as the tree needs time to repair its vascular system.
Budget, of course, is another important consideration. Most available insecticides need to be applied every year to be effective, which can be expensive. However, there's a new product (emamectin benzoate, or Tree-age, only available through professional applicators such as Arbor Doctor) that is effective for two years or even longer.
"These treatments are not cheap, and it may be more cost-effective to replace the ash trees with other species," Herms pointed out. "But some people have a strong emotional attachment to their trees, and for them it may be worth investing in these insecticide treatments. Landscape trees also have other benefits, such as increasing property value, providing shade and cooling, and increasing the quality of life in a neighborhood. So there are many factors to take into account when making this decision."
University-tested insecticides include imidacloprid, which can be applied by soil injection, soil drench or trunk injection. Imidacloprid is available in a variety of formulations and under several trade names. Depending on the formulation and application method, it can be applied from mid- to late spring, from early May to mid-June, or in the fall.
While most imidacloprid products tested are intended only for professional use, one formulation - Bayer Advanced Tree & Shrub Insect Control - is available for use by homeowners as a soil drench*. Several generic products containing imidacloprid can also be purchased at garden stores, but their formulations vary and their effectiveness has not been evaluated in university tests, Herms said.
The rest of the products included in the bulletin are intended only for professional use. They are emamectin benzoate (trunk injection, early May to mid-June); Bidrin (trunk injection, early May to mid-June); dinotefuran (systemic bark spray, early May to mid-June); and several preventive bark and foliage cover sprays (permethrin, bifenthrin, cyfluthrin and carbaryl).
*Effectiveness of this product on trees greater than 6 inches dbh is in question.
OUTSIDE LINKS ABOUT THE EMERALD ASH BORER
Ohio Department Of Agriculture
Emerald Ash Borer Information Site
