Actually, clear plastic is best. Solarization let's the sun through and the plastic traps the heat. A killer greenhouse effect. Water well, put on the plastic, and you get par boiled weeds. Non-toxic too. Shmuel Silinsky Jerusalem, Israel On Tue, May 11, 2021, 8:12 PM Robert Parks via pbs < pbs@lists.pacificbulbsociety.net> wrote: > Multipart process...much like eliminating Oxalis pes-caprae. > > Remove as much of the tuber mass as possible. In one yard with sandy soil, > I actually sifted the soil to remove smaller bulbs of Oxalis. > > Exhaust the tubers. Mow/weed leaves, Apply herbicide to fresh growing > leaves/cut stems...maybe something works on Pinellia. Water and fertilize > at the beginning of the growth period, then cover with black plastic: no > light for phtosynthesis, and possible cooking on sunny days, keep watered > and fertilized to encourage growth in the dark. > > Eventually can revert to eternal vigilance whenever a leaf shows. > > Robert > > On Tue, May 11, 2021 at 9:24 AM Robert Lauf via pbs < > pbs@lists.pacificbulbsociety.net> wrote: > > > Some years ago, I was hybridizing Pinellia tripartita and bought a > > presumed natural hybrid, Pinellia 'Polly Spout, which was billed as > sterile > > so it doesn't volunteer. Tragically, my plant failed to read the > marketing > > literature and has now taken over part of my yard and clearly intends to > > take over the neighborhood. It seems to be impervious to multiple > > applications of Roundup. I called the Air National Guard to see if I > could > > request an air strike with some Agent Orange, but they balked (OK that > was > > a joke). Digging is a fool's errand because bulblets can break off and > pop > > up later. > > If anyone knows how to eradicate this horrible weed, I'm all ears. > > Bob E Tenn > > _______________________________________________ > > pbs mailing list > > pbs@lists.pacificbulbsociety.net > > http://lists.pacificbulbsociety.net/cgi-bin/… > > Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net> > > > _______________________________________________ > pbs mailing list > pbs@lists.pacificbulbsociety.net > http://lists.pacificbulbsociety.net/cgi-bin/… > Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net> > _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>