By Will Rowlands Purple loosestrife (Lythrum salicaria) was the first invasive plant I learned about. In the 1970s I saw ever larger incursions along Route 17K in New York, south of the Catskills, on my way to visit my older brother near Ithaca. When travelling the same route ten years ago and fully aware of its invasive nature, I saw very few patches. The area had been gentrified in the intervening decades and was now home to numerous horse farms. Donna Ellis at UConn told me that beetles were being used for bio-control in New York State but the loosestrife is still out there … I just wasn’t seeing it.…