I wished I had known this before, but I made a potentially horrible mistake of using composted mulch on most of my garden beds, including on three Hugelkultur beds. I now have a huge symphylans problem.
Ok, so the problem is the solution, right? I feel like my best plan is to move all stressed perennials out of mulch (after cleaning them carefully) and then grazing heavily the area with chickens. Lots of chickens because there's lots of chicken food. Any other ideas?
I did get a heavy Jerusalem artichoke and cow pea crops from the hugelbeds last year, but doubt that will work this year.
Edit: the following page is a great resource on symphylans and reviews all of the main options: http://bugs.scribble.com/symphs.html
Tilling is not an option for me but I am considering neem and homemade chrysanthemum concentrate soaks. I also had marigolds do well in the hugelkultur beds but the symphylans may have retreated from the hot weather.