I helped Park botanists weed-whack this invasive Cheatgrass (Bromus tectorum) patch the next day (along with the native Whisker Brush (Lianthus ciliatus, Polemonium) growing here), and then weed-whacked it again a couple weeks later, and followed up with hand weeding, weekly for the couple few key months, and after a few years, was finding no more than a couple dozen Cheatgrass plants a season, with the Whisker Brush having largely taken over. The success of such invasive weed management, with early detection of simple annuals like Cheatgrass on this scale, at the margins, mostly hinges on diligent, well-timed follow-up.
