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Hi Fellas,
Just sussing this out, for the US. I'm in Canada- anyway, so a couple years ago I was doing some work and noticed this Buckthorn plant interaction. So, I went and isolated a chemical (plant-based) and then tested it both in the Lab and (finally) in the field, once we stabilized it and were able to get it to work through the sprayer (it was a bit of a pain, until we got the formulation down, because it is low solubility in water.
Right, so, I patented the chemical as a herbicide (with the USPTO and Canada), and my wife and I worked nights at the University (kids in tow, in a friggin' Crop Science lab....) to develop a synthetic method (I was a chemist as an undergrad) and blah, blah, blah which allows us to produce it pretty cheap (about 20.00 per KG AI). We are hoping to have the EPA/PMRA Registration fairly soon (18 months). So, this chemical herbicide is controlling Buckthorn (specifically) with 100% control at about .5% concentration or about a kilo per Hectare. We;ve tested it as Cut-Stump (better than Garlon), as a foliar on <2 year seedlings (100% control) and as a pre-emergent (also, 100% control). It is selective- so it doesn't affect Native Plants.
It's cool stuff. Fully-funded by getting down trees.
So, getting back to my question - do you do much Buckthorn in the states. Is it a big problem - here it is quite an issue (Ontario, Canada). We mostly use brush saws, and then try and hit it every few years, especially in places where chemical control is illegal. What kind of budgets would you have for this stuff (esp. state parks, municipalities)? So, ours is a PDS (Plant Derived Synthetic) and we challenged ourselves to complete the formulation with food-grade (to keep it edible) rather than other, typical, adjuvants (eg. toluene, really?)