At 08:46 AM 6/29/99 -0500, you wrote: >Well, don't know that we have a "roundup proof cultivar", but even the literature >down here states that roundup may not be real affective on mature stands of poison >ivy. The most affective "spray" period is mid-late March or early April, right >after knew leaf development or immediately around bloom stage, with subsequent >applications as needed, depending on stand establishment and maturity. Once the >plant has been allowed to progress past blooming, the leaves and plant appear to be >much hardier. There is a big difference between a well established stand and a >stand that is in the beginning stages of development. > >My folks just recently spent 150+ dollars on round-up and all they did to an >established stand on their lot is make it "kinda" sickly, then it was over. The few >sick leaves that existed showed no evidence of chemical treatment after 2 days. >They were to the point of wanting to spray it all down with gasoline, but that could >be more hazardous than applications of roundup with wild abandon. > >I recommended they wait until this winter and cut every vine on the property, then >hit the new leaf buds with diesel as soon as they appear. They have established >vines on their place that are 5 inches thick. It will undoubtedly take them a few >years to eradicate these vines from their property. And diesel has proven to be >very affective when used in the "optimal" window for doing the most damage. > > >> Leave it to Texas to have a Roundup proof cultivar of poison ivy. Roundup works >> worth two or three flips on the vine here in Maryland. :-) >> >> Ed Flynn Md zone 6/7 > >But, ya know, things are always bigger and better and hardier in Texas!! ;-))))) > >Thanks > >Paul Reynolds >Environmental Agronomist >Austin Texas > Brush-B-Gone doesn't work? I'd try that in preference to Roundup. Margaret L