jeudi 9 juillet 2020

White pines in peril

White pines in peril
Paul Hetzler - North Country Public Radio - Mar 07, 2020
 Starting around 2009, needles began to turn yellow and drop early, and new growth was stunted. At first these symptoms were restricted to sites with shallow soil, and along highway corridors  where trees were already stressed by deicing salt, which burns foliage as well as roots. The droughts of 2012 and 2016, unprecedented in terms of low soil moisture, set pines back even further. By 2018, even pines on better sites were looking sick.