Hi Jan, On 01/02/2020 18:26, Jan Jeddeloh wrote: > Can we talk about the “herbicide” known as a propane weed torch? Has anyone used one of these things? I've used one. Works best on dry material. Takes time - stuff does not just combust. Get too close and the flame goes out. Things grow back. Useful but not magic. Comments against the soggy background of NW England, where it is rare to have 24 hours without rain. On Martin's comment, Raspberry Pi, Robot arm, and one of the computer vision packages - snail picker - surely doable. -- David Pilling http://www.davidpilling.com/ _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…