Will Ranger Pro kill cactus?
I find that glyphosphate is excellent to kill Opuntia cactus (spineless beavertail, probably Burbank, in my case). I cut to near the ground, then applied 41% Roundup to the cambium layer. There was no regrowth, and the stump shriveled to fibers within 6 months, in low-water Poway (near San Diego). The same technique works well with Coast Live Loak, Laurel Sumac, and Poison Oak, and seems to work with all trees. If it doesn't kill the first time, it slows growth down enough so a second application usually works. This technique is well known to local Master Gardeners, farmers, and landscapers.
Thank you for that information! We are always happy to learn what works well for our customers. Unfortunately, we are bound to what is written on the product label and if the manufacturer hasn't listed certain plants, then we cannot recommend that someone use the product for an "off label use".
Answer last updated on: 01/24/2011