It's controversial in gardening circles but I did it. I finally let the neighbor (while my nasty seeds floated into his yard) spray my weed patch with Roundup. Why I was so cowardly and resistant about this, I don't know. Maybe it's because of that pesky -cide suffix. Maybe because glyphosate is alleged to form environmental xenoestrogens. A friend told me that Roundup causes breast cancer, about which there is no definitive scientific proof (Scientific American - 1997). I've had breast cancer, and my illusions that taking impeccable care of myself will give me immunity to most catastrophic illnesses have already been shattered. And now I know that life is too short to be a slave to weeds. So what's a little chemotherapy and radiation burn, ya know? I don't plan to use herbicides indiscriminately but I wanted to get control over a tenacious area where previous efforts had failed. I did slink back home guiltily to Dr. Earth and he forgave me my indiscretion - this time. You can beat me up now, if you want. Steal my lunch money, too.
p.s. I did use some clove oil organic herbicide on a patch of dichondra and I have some grieving earthworm widows now.