This sounds crazy, but this works. Years ago, a insurance company contacted me about some PI, they had a back patio area that had been let go for like 10 years. Little micro climate in the middle of downtown. Had tons of PI that was engulfing the trees, hackberry's and lindens if I remember right. They where really freaked about it, getting it out and not releasing any dust or sap into the air. Very dense area with little trendy boutique lawyer offices, shops and such. I looked at it and said "HELL NO!" I was up for it, but I am immune to it, my guys at the time, not so much. One kid that worked for me could look at it and get it. I wanted this firm as a client so I contacted a pro landscape company that the wife is a biologist. Handed it over to her and stayed on for the assist. She showed up with Trioxx (SP?) and syringes. We had to be real careful with the chem as it will kill anything pretty quick, so she injected the PI, the whole gallon,down at the base with it, this took several hours. She was worried that the chem would still get into the tees, but it didn't. The client didn't care if it did, they wanted the trees, but wanted the PI gone more. So if the trees where effected, so be it. We caution taped the area off came back in a month. It was all dead. Crunchy dead. She said we needed to wait till winter to remove, more so windows where not open and peeps where not around. We did, I used my bucket and went up and started pulling it off the trees, it came off really easy. I don't get PI, so I was doing most of the work, I used lopers and bypass pruners to free the wraps but just pulled off the big leaders. Some of the stuff was 3-4" in dia. It took 3 days to get it out. Some trees where engulfed. We loaded it into my dump trailer, she said not to chip, as the dust.... We took out to a farm and burned it. Had the trailer full. She did it this way, in a effort to not do any damage to the trees. It worked, they all came back and are still thriving today, that was maybe 15 years ago. She billed them over 10'gs for this! I just about fell over when she told me this. She said that she explained the liability she was taking on and since they where a super hi-end insurance co, they got it and where happy to pay and to eliminate their exposure if someone was to get it and was severely allergic.
