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Global Invasive Species Team listserve digest #080
Fri Mar 16 2001 - 15:50:14 PST
--CONTENTS--
1. Garlon 4 prices (Florida)
2. Texas Conference on Invasive Species and Restoration (Texas)
3. Imminent Weed Management Workshop (New York)
4. Weed alerts and Species Management Summaries (Nationwide)
5. Information sought on invasive Agrostis and Poa species (Global)
6. Six principles for controlling weeds with volunteers (Maryland)
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1. Garlon 4 prices (Florida)
From: Mark Zeller (ark.zeller(at)dep.state.fl.us)
There is a product called Garlon 4 Forestry (Dow) which only comes in 30
gallon drums, but is identical to the regular Garlon 4. The percent active
is the same as regular Garlon 4, and the label is an exact copy except for
the word "forestry". We purchase ours under a state PO for $62.00/gal
which is still cheaper than the regular Garlon 4 in 2.5 gallon, which we
get under the same bid for $78.73/gal
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2. Texas Conference on Invasive Species and Restoration (Texas)
From: Barry Rice (bamrice(at)ucdavis.edu)
The Texas Society for Ecological Restoration is having its 6th Annual
Conference 17-19 August, in Hunt Texas. The featured topic is "Invasive
Species and Ecological Restoration". If you wish to learn more about the
schedule, registration, etc., point your web browser to:
http://www.phil.unt.edu/ser/
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3. Imminent Weed Management Workshop (New York)
From: Cris Winters (cwinters(at)tnc.org)
A four hour Weed Management Workshop, presented by TNC's national invasive
plant expert John Randall. The workshop will focus on managing invasive
plants, including preventing invasion, setting control priorities, and
adaptive management. John Randall is the Director of The Nature
Conservancy's Wildland Invasive Species Team. The meeting is in
Syracuse, New York, and costs $15-30. To register, contact the IPC office
by phone (518-271-0346) or e-mail (lquillen(at)tnc.org). Confirmation is
needed by March 22nd. Registration forms can be downloaded from the
Wildland Invasive Species Team web site at
http://tncinvasives.ucdavis.edu/meetings.html
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4. Weed alerts and Species Management Summaries (Nationwide)
From: Barry Rice (bamrice(at)ucdavis.edu)
Three new weed alerts have been posted on the Wildland Invasive Species
Program website: Romulea rosea (a western weed), Cayratia japonica (Gulf
Coast states), Cryptocoryne beckettii (another Gulf Coast weed). See
http://tncinvasives.ucdavis.edu for more information.
We have also modified how we have posted our weed Element Stewardship
Abstracts. Now you have the option to comment on these documents. We'll
add your comments to the web site for each weed. Think of this as a way to
update the Species Management Summaries and make each more of a "living" document.
As an example, see http://tncinvasives.ucdavis.edu/esadocs/allipeti.html
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5. Information sought on invasive Agrostis and Poa species (Global)
From: M. Jordan (mjordan(at)tnc.org), J. Randall (jarandall(at)ucdavis.edu)
Please let us know of any instances you are aware of where non-native
Agrostis species (redtop, bentgrass) or Poa species (bluegrasses) are
invasive. Research reports or data supporting this will be especially
valuable. We are seeking this information because it has recently come to
our attention that there are several research projects seeking to
genetically manipulate non-native Agrostis stolonifera and Poa pratensis
for herbicide resistance. If the work is successful and releases are
approved for these herbicide resistant grasses might become widely used in
various turfgrass and golf course mixes. If so, they might interbreed and
pass herbicide resistance to escaped, free-living populations, including
any that have invaded natural areas. Different Agrostis species are known
to interbreed with one another and the same is true of different Poa
species. Officials from the USDA-APHIS program responsible for determining
whether genetically manipulated plants should be approved for release have
indicated that they will seriously consider well-documented evidence that
Agrostis spp. and Poa spp. are troublesome invaders in any decisions they
make. We know Agrostis stolonifera (synonym A. alba) is invasive in
globally rare native grassland communities on Long Island, NY and Agrostis
species are also widespread and locally abundant in Massachusetts.
Agrostis stolonifera has also been reported as invasive in TNC's Middle
Fork of the John Day River in eastern OR and A. tenuis has been reported
from prairies in the Puget trough south of Seattle, WA and in meadows of
the Sierra Nevada. Poa pratensis is invasive in meadows and grasslands at
sites scattered the northern US. Unfortunately, thus far we have only
been able to find anecdotal evidence of the problems these species cause
so we seek better-detailed and documented information.
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6. Six principles for controlling weeds with volunteers (Maryland)
From: Marc Imlay (ialm(at)erols.com)
Marc Imlay leads and works with volunteer groups that have had success
controlling some invasive plants in several parks and preserves in
Maryland. He found that the following principals help ensure
effectiveness:
1)Morale. Have enough volunteers, usually 10 or more, to get the job done
and see real results.
2)Judicious use of herbicides carefully targeted to the alien invasive
species where they biodegrade relatively quickly and do not move to other
plants.
3)Flexibility. Pull after a rain storm when it is easy. You can remove
annuals when the weather is dry, or spray at that time.
4)Compare fact sheets from different groups, especially:
--Maryland Native Plant Society
(http://www.mdflora.org)
--Virginia Natural Heritage/Virginia Native Plant Society
(http://www.state.va.us/~dcr/dnh/invallia.htm)
--Tennessee Natural Heritage/Tennessee Native Plant Society
(http://www.se-eppc.org/, see Publications for Tennessee manual)
--Invasive Plants of Canada Project
(http://infoweb.magi.com/~ehaber/factgarl.html)
--Alien Plant Working Group
(http://www.nps.gov/plants/alien/factmain.htm)
--The Nature Conservancy's Wildland Invasive Species Team
(http://tncinvasives.ucdavis.edu)
5)Inventory and prioritize by harm, doability, and incipient populations.
Some invasives cause more harm than others. Some may be too difficult to
remove now. Newly established invasives are a high priority.
6)Follow through. Plan on coming back to get them all.