Tyvek suit, rub yourself with the technical stuff before hand and immediately wash with a rag after. Change cloths and put old cloths in a garbage bag (just wear something you don’t care about and throw out in all honesty)
I’ll be hopefully experimenting with that hypothesis on a group of about 6 cherries that were all planted too deeply. At least three have significant girdling roots, planning on hopefully having a few controls that are untreated.
Urban arboriculture had a peer reviewed paper reevaluating the efficacy of imidicloprid drenches for EAB. I don’t remember the details.
for one there’s less off target impact with injections. As well as longer residual and efficacy (2 years for EAB).
Check local laws about application of safari without a licensed applicator. You’re probably good to go but here in NY safari is banned, but when it was in use (like many pesticides) it was a restricted use pesticide and you needed an applicators license for it.
also utilize the trench technique...
Lobby to get the city to pay for injections throughout city limits.
large street trees like those take a long time to get to that size and are a valuable piece of infrastructure and have an ecological value that may never be replaced.