HELP FOR HOMEOWNERS
The presence of EAB in its early stages may not be visually apparent. Tree death occurs from the EAB larvae hatched under the bark of the tree. The larvae feed on the tree’s transport system, and cut off the flow of water and nutrients to the tree. Their feeding causes infested trees to be brittle, dangerous, and prone to breakage.
Ash trees need to be treated early so that insecticides can still have a vascular network to travel throughout the tree. Once canopy die back passes 50% a tree cannot be saved.
Larvae may feed off the tree for 1-2 years before emerging as beetles and starting the cycle again. The damage caused by adult Emerald Ash Borer chewing leaves is slight in comparison to the damage caused inside the tree by the larvae. (Lifespan: Adult Males ~ 13 days, Adult Females ~ 21-22 days)
All untreated Ash trees will become infested and have to be removed.
We do not recommend store remedies bought and applied by homeowners.
These applications contain imidacloprid (a neonicotenoid) which is applied as a soil drench under the tree. Soil drenching can result in flower and plant contamination which can be fed on by pollinators and transferred back to the hive.
It is also not known how much of the soil application makes it up and into the tree, since a tree’s root system fans out far beyond the base of the tree where the soil drench is applied.
Homeowner imidacloprid applications must be applied yearly and are not effective on trees with a DBH greater than 15 inches.
Professional TREEage trunk injections for Emerald Ash Borer have become cheaper, more effective, and longer lasting; making them a more affordable and environmentally sound option.
Preemptive application of the injectable insecticide emamectin benzoate is the recommended treatment for trees that are to be saved.
TREE-age (emamectin benzoate) Trunk injections can be applied from leaf-out (June) through October. Since it is injected into the tree, the product kills the source of the problem, the larvae, and remains effective for 2+years.
Some other applications such as sprays attack the adult Emerald Ash Borer beetle, have to be applied yearly, and can only be applied during a 4-6 week period (June). Most of these types of applications are not safe for bees.
Old, damaged, or unhealthy trees may not respond well to treatment, thus removal of the tree may be a better option. For trees in average to good health, Emerald Ash Borer applications have become cheaper, more effective, and longer lasting; making treatment an affordable and viable option.
Areas with high density or ash only trees, aesthetically valued trees, and trees contributing to property value can be saved if treated promptly and on schedule.
Treatments are good for two years, and studies are currently showing longer efficacy rates. After EAB peaks and declines, treatments will be less frequent.
Service Areas: Boulder, Longmont, Erie, Gunbarrel, Niwot, Louisville, Lafayette, and Hygiene
Year of Initial EAB Discovery
Ohio (2003), Indiana (2004), Illinois and Maryland (2006), Pennsylvania and West Virginia (2007), Wisconsin, Missouri and Virginia (2008), Minnesota, New York, and Kentucky (2009), Iowa and Tennessee (2010), Connecticut, Kansas, and Massachusetts (2012), New Hampshire, North Carolina, Georgia, and Colorado (2013), New Jersey and Arkansas (2014), Louisiana (2015), Texas, Nebraska and Delaware (2016)
EAB Colorado 2013-2016
12Page 1 of 2