Question for anyone using the Arborjet system (I called them direct and have yet to hear from them). I have a RFQ from a local city to treat the street trees downtown. They are wanting to compare cost of soil injection (I've had the contract the past two years) vs arborjet. I can figure the chemical cost from the arborjet paperwork, but I can't find anything that tells me how many injection sites per tree on a DBH basis.
Can anyone tell me how many injection sites are needed? Is it based on DBH or amount of material in mL that you need? ie: I do know that I will have to adminster 2mL per inch DBH.
Also, if anyone has a rough productivity figure from their experience (how many injections per hour type of thing), that would be great too?
Thanks for the help.
Paul.