How much does it cost to treat oak wilt?
The costs of oak wilt treatment measures are comparatively reasonable – compared to the value the trees contribute to the overall property value and compared to the costs of doing nothing.
Any way you look at it – oak wilt levies economic losses not only upon those whose property is affected but also collaterally upon those properties in the neighboring vicinity. The best response is one in which the landowner seeks to reasonably minimize their long-term losses/expenses.
I am a ISA Board Certified Master Arborist and have maintained the Texas Oak Wilt Qualification since its inception in 2007 and I regularly perform Tree & Plant Appraisals as well as provide real estate inspections as part of one or both parties seeking to satisfy due diligence during the transaction. In many cases, the disease – when left completely untreated has rendered most of the oaks dead or devalued to the point the are a monetary, and safety, and aesthetic liability. The new buyer will expect the costs and headache of a large removal and replanting project to be reduced from the sales price. In most cases, this amount will significantly exceed say an injection campaign over numerous years of almost exclusive single treatment per large trees say over 12”+. At $10.00 (plus tax if applicable) per diameter at breast height (dbh), that typically runs only a 25-33% frction of full removal and replanting costs. Under 12” dbh tree removals often can be handled by a landowner and they don’t have near the value of the larger trees (value exponentially increases with size). The larger trees are much more costly and dangerous to remove, not to mention that they represent the lion’s share of the contributive value of plants to a property’s overall value. In those cases of larger properties – the option of trenching and silvicide or silvicide alone can be quite less than a bulldozer “fix” or a fungicide treatment plan.
Fungicide Costs
Alamo Fungicide Oak Wilt Treatment
Let’s look further into the costs of fungicde injection for “high-value” oaks. High value is admittedly somewhat subjective. Different landowners have varying views of what constitutes high value to them. At a minimum, I would propose that in most cases – not every oak on a piece of property are high value. Some trees may very well even have a negative value and value of the property would increase with their removal (i.e. visually detracting tree in a prominent location, a large high-risk rotten oak in close proximity to a major property improvement such as a home). Others may have value as sacrificial signal or flare trees mapping the location of the fungus in order to most effectively execute a fungicide injection program.
The consumer should be advised - some contractors have quite unfortunately switched to generic fungicides to lower their costs. This is not a cost reduction a customer should want to support. Oak wilt injections are somewhat similar to a once-only at bat baseball event. This is an all or nothing proposition. Alamo is the flagship prophylactic (pre-infection) treatment product with the best and most research and product manufacturing quality control measures. Oak wilt is a primary pathogen and possibly the worst tree disease ever. Demand the best. In the event that the size of the oak tree, or there is severe drought, significant root loss has occured, or injection must per performed in the spring with while soft tissue is present - all may raise probability of phytotoxicity or the tree is so sick that a macro-infusion with Alamo approach will almost certainly fail to get enough fungicide into the oak, then a micro-infusion with Tebuject 16HP will yield the best results (In 1997 Dan Wilson USFS proved that both Tebuconazole and Propiconazole both have fungicidal control of oak wilt on 10 different strains of oak wilt in the 400-600 ppm; study is lined on my management pg - "Micro-infusion").
One positive aspect of fungicide treatment is that in many cases the property owner has a lengthy span of time to space out injection costs on account of the disease generally moves anywhere from 50-150’ per year. For example, on a 1-acre lot it may take 3-7 years to travel completely through. For instance, if there are 30 high-value trees spaced out relatively evenly throughout the property, and the median diameter is about 15” dbh then the total costs of $4,500.00 (plus tax) and say the disease would move through the property in 4.5 years – the annually allotted oak wilt injection costs would be about $1,000.00.
Trenching & or Silvicide Costs
There are many tangentials in these two particular approaches that don’t allow for set pricing everywhere. As far as approximate pricing:
Arborist consultation: ($250 per hour)
Machine transport costs: $750-$2000
Daily operator costs: $750-$2500 (500-1500 linear feet)
Fuel and teeth repair: $250-750
Silvicide in trench: $1500 first application minimum / $1000 second application minimum
Clearly there are some big numbers here, but stopping the disease long-term is a highly valuable result. What is important to remember here is – you get what you pay for. If an excavator is recommended but you opt to utilize a rock saw anyways – you could end up really regretting it. If you choose to disregard the need in almost all cases the need to rogue or silvicide – you could really end up regretting it. If you hire the non-expert to design the trench and install it to save a buck – you could really end up regretting it.
Research Request
Finally, regardless of which arborist you choose to utilize, we are conducting research on the effects of oak wilt upon all white oak species and if you have any you are concerned either have oak wilt and or were treated for oak wilt, or are concerned that they may contract it as they are now established and oak wilt is either on the property or about to be – we hope you will help our cause to better expand our knowledge base on this issue by contacting us and allowing us to discuss your situation in more depth. Our primary goals with this project are documentation by means of laboratory testing and periodic visual documentation if positive results occur.
We also are engaged in proprietary research on increasing results of thereapeutic fungicide treatment, and alternate fungicide family treatment efficacy as well as silvicide inclusion in oak wilt management.
Due to the lack of the Texas A&M University Systems multiple agencies failing for many many years now to increase knowledge and improve success - we have picked up the torch and are carrying this need forward.