"culprit" wrote:

i wish we could do that... our yard is bordered by a protected native
growth area. it's filled with blackberries. they try to spread into our
yard constantly, but i can't legally pull up the roots.

You can apply roundup in late summer or fall to the portion that is on
your property. [Representatives from Monsanto recommend a 2:1 tank
mix of glyphosate (Round-up) with triclopyr (Garlon 3a), with Round-up
rates at 2% or less and Garlon 3a rates at 1% or less. Be sure to add
most of the water to your mix of glyphosate before adding the Garlon 3a
to avoid incompatibility problems.]

Since it is a systemic, it will kill the roots that are feeding that
branch. If the protected area is a wetlands, use Rodeo (Dow) or
Aquamaster (Monsanto).

Actually Himalayan Blackberries [Rubus armeniacus or Rubus discolor or
Rubus procerus] are alien invasive species from Western Europe. They
are not native. So if your protected area is for native plants, then you
are doing a service by killing the blackberries.
See: http://tncweeds.ucdavis.edu/esadocs/rubudisc.html

Other alien species of blackberries are not considered invasive. They
a

Rubus laciniatus (cutleaf blackberry)
Rubus linkianus (Link's blackberry)
Rubus macrophyllus (largeleaf blackberry)
Rubus thyrsoides (Great Britain blackberry)
Rubus tomentosus (woolly blackberry)
Rubus triphyllus (threeleaf blackberry)
Rubus ulmifolius (elmleaf blackberry)
Rubus vestitus (European blackberry)

A good control manual is at:
http://tncweeds.ucdavis.edu/moredocs/rubdis01.pdf

There are a number of blackberries that are native to the USA. They are
not considered invasive except Rubus argutus. They include:

Rubus allegheniensis (Allegheny blackberry)
Rubus alumnus (oldfield blackberry)
Rubus andrewsianus (Andrews' blackberry)
Rubus arcticus (arctic blackberry)
Rubus argutus (sawtooth or prickly Florida blackberry) invasive
Rubus arvensis (field blackberry)
Rubus audax (Tampa blackberry)
Rubus audax (Tampa blackberry)
Rubus bicknellii (Nantucketblackberry)
Rubus bigelovianus (lowland blackberry)
Rubus burnhamii (Burnham's blackberry)
Rubus bushii (Bush's blackberry)
Rubus canadensis (smooth blackberry)
Rubus concameratus (West Virginia blackberry)
Rubus conanictuensis (Conanicut Islandblackberry)
Rubus cuneifolius (sand blackberry)
Rubus defectionis (eclipse blackberry)
Rubus densissimus (Morgantown blackberry)
Rubus dissimilis (bristly Oswego blackberry)
Rubus elegantulus (showy blackberry)
Rubus exeter (Baton Rouge blackberry)
Rubus flavinanus (Windham County blackberry)
Rubus floricomus (manyflower blackberry),
Rubus florulentus (big blackberry)
Rubus frondisentis (leafy blackberry)
Rubus frondosus (yankee blackberry)
Rubus fryei (Cacapon River blackberry)
Rubus fruticosus (shrubby blackberry)
Rubus glandicaulis (glandstem blackberry)
Rubus gnarus (Pollock's Mill blackberry)
Rubus griseus (Loogootee blackberry)
Rubus gulosus (New Brunswick blackberry)
Rubus hawaiensis (Hawai'i blackberry)
Rubus hanesii (Hanes' blackberry)
Rubus heterophyllus (ecotone blackberry)
Rubus immanis (Watauga River blackberry)
Rubus impar (Posey County blackberry)
Rubus insons (New England blackberry)
Rubus insulanus (island blackberry)
Rubus inclinis (marshland blackberry)
Rubus inferior (Ocala blackberry)
Rubus ithacanus (Ithaca blackberry)
Rubus junceus (herbaceous blackberry)
Rubus kelloggii (Kellogg's blackberry)
Rubus kennedyanus (Kennedy's blackberry)
Rubus laudatus (plains blackberry)
Rubus lawrencei (Adirondack blackberry)
Rubus latens (Massachusetts blackberry)
Rubus longii (Long's blackberry)
Rubus mollior (softleaf blackberry)
Rubus montensis (mountaintop blackberry)
Rubus multiformis (variable blackberry)
Rubus multispinus (devil's blackberry)
Rubus navus (Grand Lake blackberry)
Rubus noveboracus (New York blackberry)
Rubus oklahomus (Oklahoma blackberry)
Rubus originalis (Cold Spring blackberry)
Rubus ortivus (Mt. Desert Island blackberry)
Rubus ostryifolius (highbush blackberry)
Rubus pascuus (Chesapeake blackberry)
Rubus parcifrondifer (Silver Creek blackberry)
Rubus paludivagus (Cape Cod blackberry)
Rubus pernagaeus (Smithfield blackberry)
Rubus pensilvanicus (Pennsylvania blackberry)
Rubus pergratus (upland blackberry)
Rubus persistens (persistent blackberry)
Rubus philadelphicus (Philadelphia blackberry)
Rubus prestonensis (Terra Alta blackberry)
Rubus probabilis (tree blackberry)
Rubus probativus (Birmingham blackberry)
Rubus pubescens (dwarf red blackberry)
Rubus pubifolius (Eagle Rock blackberry)
Rubus pugnax (pugnacious blackberry)
Rubus randolphiorum (Plymouth blackberry)
Rubus recurvans (recurved blackberry)
Rubus rosa (rose blackberry)
Rubus rossbergianus (Connecticut blackberry)
Rubus rosarius (James River blackberry)
Rubus russeus (Halifax blackberry)
Rubus rydbergianus (Rydberg's blackberry)
Rubus saltuensis (Tolland County blackberry)
Rubus sceleratus (Androscoggin River blackberry)
Rubus setosus (setose blackberry)
Rubus semisetosus (swamp blackberry)
Rubus sewardianus (Seward's blackberry)
Rubus spectatus (sphagnum blackberry)
Rubus suus (branched blackberry)
Rubus trux (Lookout Mountain blackberry)
Rubus tygartensis (Taylor County blackberry)
Rubus ucetanus (Hillsborough blackberry)
Rubus ursinus (California blackberry)
Rubus variispinus (Vicksburg blackberry)
Rubus vermontanus (Vermont blackberry)
Rubus wheeleri (Wheeler's blackberry)
Rubus wisconsinensis (Wisconsin blackberry)
--
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