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Una, at first it wasn't clear how important and issue this was. But if you look at the categories, it seems that consulting arborists are a subset of Landscape architects. I find that irksome, but I'm not sure what the best way would be to go about ...

Xyella, in addition to Pierce's disease, also causes phony peach disease. This bacterium was described in the 1800s but was not initially recognized when it showed up on east coast shade trees in the 1980s-90s. In hind site, I doubt we could have done ...

JS: I'd use 541320-07 at this point if anyone ever asked it. I don't think it existed in 1990... US: It didn't. I don't think even 541320 existed then. 541320 is a NAICS code now, but these longer extensions -07 etc. seem to be a recent elaboration ...