by Carl Strang
As I begin the slide toward my retirement next August, I have begun to tie up some loose ends. One of these was the need to pull markers I had left at all the garlic mustard study plots I had established over the years at Mayslake Forest Preserve. That research was very satisfying, confirming experimentally that stands of garlic mustard can be removed effectively without use of chemicals or tedious hand pulling of individual plants (the results were last summarized here in 2013).
Some of those plots go back 5 years, and I was surprised at how little garlic mustard had returned to them.
These plots were shaded, which would inhibit growth, and the limited number of plants suggests that these were new infestations which had not established much of a seed bank.