emerald ash bore treatment - Ask Extension
I was wondering if I could treat my ash tree myself if it is 18 inches in diameter and 55inches in circumference? I v'e read not to do so if it exceed...
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emerald ash bore treatment #864915
Asked April 17, 2024, 5:39 PM EDT
I was wondering if I could treat my ash tree myself if it is 18 inches in diameter and 55inches in circumference? I v'e read not to do so if it exceeds 15 inches. Thanks again for your help!
Larimer County Colorado
Expert Response
Hi David,
You are correct that the limit for homeowner-available products is 12-15 inches. The insecticide wouldn't be as effective and the tree may still be at risk to EAB.
If this is a tree that you want to invest in, then consult with a certified arborist who can do injections at the base. The injections last two years. The most effective product is emamectin benzoate - the homeowner product is imidacloprid, which has less efficacy than emamectin benzoate.
However, treatment this year could depend on where you live in Larimer County. The insect has not been confirmed in Loveland or Windsor. And it's been confirmed on the north side of Fort Collins, but not in mid-town or south.
You are correct that the limit for homeowner-available products is 12-15 inches. The insecticide wouldn't be as effective and the tree may still be at risk to EAB.
If this is a tree that you want to invest in, then consult with a certified arborist who can do injections at the base. The injections last two years. The most effective product is emamectin benzoate - the homeowner product is imidacloprid, which has less efficacy than emamectin benzoate.
However, treatment this year could depend on where you live in Larimer County. The insect has not been confirmed in Loveland or Windsor. And it's been confirmed on the north side of Fort Collins, but not in mid-town or south.
Thanks again for your response to my question. Your response created two more questions. My one ash is 13 inches in diameter and 37 inches in circumference(would you self treat this tree?) And my home is at the intersection of vine drive and overland trail in ft. collins.(would you treat my trees this year or wait until next year?). Many thanks again for your help!
Hi David,
I would suggest you get a quote for the treatment of both trees - just to see the pricing.
But yes, you could treat the 13" tree yourself, understanding that you will need to apply the product every year. Always follow the instructions on the label and apply the product accordingly. The product will be best translocated in well-watered conditions, so make sure the tree is getting regular water prior to the application. Here are some product options (this is not a comprehensive list):
I would suggest you get a quote for the treatment of both trees - just to see the pricing.
But yes, you could treat the 13" tree yourself, understanding that you will need to apply the product every year. Always follow the instructions on the label and apply the product accordingly. The product will be best translocated in well-watered conditions, so make sure the tree is getting regular water prior to the application. Here are some product options (this is not a comprehensive list):
- ACECAP Systemic Insecticide Tree Implants (acephate)
- BioAdvanced 12 Month Tree & Shrub Insect Control (imidacloprid)
- BioAdvanced 12 Month Tree & Shrub Protect & Feed (imidacloprid)
- BioAdvanced 12 Month Tree & Shrub Protect & Feed II (imidacloprid + clothianidin)
- Bonide Annual Tree & Shrub Insect Control with SYSTEMAXX (imidacloprid)
- Compare N Save Systemic Tree & Shrub Insect Drench (imidacloprid)
- Ferti-lome Tree and Shrub Drench (imidacloprid)
- Monterey Once a Year Insect Control II (imidacloprid)
