Garlic mustard moved into my backyard beneath a maple tree about five years ago. I didn't know anything about this invasive plant and last year when there were well over 1000 plants I knew I had a problem. This spring with over 10,000 plants, I'm pulling them by hand. Does anyone have any sound tips that do not involve chemicals or pesticides? At this point I'm resigned to pulling every plant and monitoring the garden for the next few years until the plant is entirely gone. Thanks for any help you can offer.