I think you are right. A lot of the maples in the neighborhood that have not had any imprelis are also sending out tons of seeds. I am from Minnesota. It's been a wild ride weatherwise here. A lot of snow two winters ago, followed by a normal summer but a very dry fall and a winter without hardly any snow. Then an early spring but no rain in March and April, but now lots of rain in May. The only thing consistent in Minnesota is it's inconsistency. I have had all kinds of spruce die, arborvitae, stone pine, red pine, and white pine. No deciduous trees thank heaven. No Dupont proposal yet. I have been meeting with tree suppliers to find out what replacements will cost so I have ammunition when it does finally arrive. I am probably going to have to get smaller B&B trees to replace larger ones so that I don't completely destroy my lawn.