Erick, Thanks for the very useful information. I realize there are many prejudices against the many organic chemicals that organic growers avoid and with some merit, but often misplaced blame. Glyphosate, for one is the 800 pound gorilla because it is so safe and useful, just like we blame Walmart for everything because it is so successful. It may be associated with colony collapse disorder (but not a cause)for the simple reason that Monsanto likes to implant at least three functional genes when they create a transgenic seed and one of them is usually Bt, a "natural" insecticide from Bacillus thuringiensis. The assumption was that corn was wind pollinated and would not harm pollinators, but it has been demonstrated that bees will use grass pollen for a protein source as needed. In this case, glyphosate use is associated with the harmful factor but not the cause. Glyphosate itself appears to be less toxic than table salt (according to the LD50) and is captured by polar components in soil and slowly degraded by soil bacteria so it has no noticeable activity in most soils. Potting soils may behave differently. You can buy detergent-free glyphosates certified for use in waterways that will not harm amphibians or invertebrates. No SCIENTIFIC studies have shown any linkage of glyphosate to cancer. RoundUp is a trade name that may contain other active ingredients besides glyphosate, especially when modified such as RoundUp Plus which contains a pre-emergent herbicide too. My earliest memories were of growing up on an organic farm in the early 50's so I don't defend chemical agriculture without reservations but it's important to look at the details wherein is contained the devil and you clearly cannot obtain accurate facts from "like-minded individuals" on social media. End of rant, Tim On Thu, Jan 30, 2020 at 10:15 PM erick lux <ericklux@gmail.com> wrote: > I've used the brands Snapshot, Amaze and Surflan at different times at the > recommended rate with no problem on a huge variety of amaryllis. > > On Fri, Jan 24, 2020 at 1:37 PM Tim Eck <timeck17582@gmail.com> wrote: > > > Can anybody suggest a good pre-emergent herbicide that is safe to use on > > amaryllids? I've never used a pre-emergent but some people swear by > them. > > > > Also, are dicot (broadleaf) herbicides like dicamba safe for amaryllids? > > I've never gotten anybody to admit it even though they tell me they're > > ineffective on amaryllids. > > Thanks, > > Tim > > _______________________________________________ > > pbs mailing list > > pbs@lists.pacificbulbsociety.net > > http://lists.pacificbulbsociety.net/cgi-bin/… > > > _______________________________________________ > pbs mailing list > pbs@lists.pacificbulbsociety.net > http://lists.pacificbulbsociety.net/cgi-bin/… > _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…