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Global Invasive Species Team listserve digest #119
Tue Jul 22 2003 - 14:35:36 PDT

1. All-TNC, all invasives meeting! (Global, Planet Earth)
2. Comment period on black carp (Nationwide, USA)
3. Request for advice on johnsongrass (Oklahoma, USA)
4. Using lake/river water in herbicide mixes (Virginia, USA)
5. Illinois and North Carolina weed lists (Illinois, North Carolina, USA)
6. Crocosmia (California, USA)
7. Invasive plants and forest management (Indiana, USA)
8. Caterpillar predation on Ailanthus (Pennsylvania, USA)
9. Leafy spurge woes (Illinois, USA)
10. Web site additions (Global, Planet Earth)


1. All-TNC, all invasives meeting! (Global, Planet Earth)
From: Barry Rice (bamrice(at)ucdavis.edu)

Ooh! Ooh! Have you marked your calendar for the All-TNC invasives meeting
in Fort Lauderdale, 2-3 November? If not, do so. Use a pen, not a pencil.
Learn more about this meeting---a definite must-see for all TNCers doing


2. Comment period on black carp (Nationwide, USA)
From: Barry Rice (bamrice(at)ucdavis.edu)

Chris Oberholster (TNC Alabama) sent me news that the black carp
(Mylopharyngodon piceus) is being considered for inclusion on the listing
of injurious fish, mollusks, and crustaceans under the Lacey Act. It would
prohibit importation and interstate trade of this species unless permits
were first obtained (exceptions exist for scientific study and a few other
situations). Those who can provide comments on the impact of this species
are encouraged to contact the US Fish & Wildlife Service by 4 August,
2003, at BlackCarp(at)fws.gov. For more information, refer to the file on
line at:


You will have to cut/paste this long url together into your web browser.
I have also temporarily posted this document on the WIST web site:


3. Request for advice on johnsongrass (Oklahoma, USA)
From: Bob Hamilton (tallgrass(at)tnc.org)

What are the latest ideas regarding herbicides to control Johnsongrass
(Sorghum halepense)? For over 5 years we have been spot-spraying
johnsongrass on several miles of roadside with Roundup (2% solution) and
it does not seem like we are gaining any ground.


4. Using lake/river water in herbicide mixes (Virginia, USA)
From: Curtis Hutto (cjhutto(at)dcr.state.va.us)

Does anybody have experience tank mixing glyphosate (Rodeo) with lake or
river water? I am concerned about the particulates reducing the efficacy
of the formulation, but this would make the logistics of aquatic spraying
much easier.


5. Illinois and North Carolina weed lists (Illinois, USA)
From: Barry Rice (bamrice(at)ucdavis.edu)

Ann Bartuska sent me some good news from Illinois. The Illinois Exotic
Weeds Act was amended for the first time since it was enacted in 1985.
Both kudzu and buckthorn were added to The bill passed unanimously in the
senate, and passed the house with only one dissenting vote. The Act
prohibits the buying, selling, distributing, or planting of seeds or
plants of designated exotic weeds.

As a result of the amendment, the plants now designated "exotic weeds" in
Illinois are: Japanese honeysuckle (Lonicera japonica), multiflora rose
(Rosa multiflora), and purple loosestrife (Lythrum salicaria), common
buckthorn (Rhamnus cathartica), glossy buckthorn (Rhamnus frangula, syn.
Frangula alnus), saw-toothed buckthorn (Rhamnus arguta), dahurian
buckthorn (Rhamnus davurica), Japanese buckthorn (Rhamnus japonica),
Chinese buckthorn (Rhamnus utilis), and kudzu (Pueraria lobata, syn.
Pueraria montana).

Ironically, the assigned number to this house bill was 666.

Similarly, Beth Bockoven (TNC-North Carolina) emailed me that as of April
2003, oriental bittersweet (Celastrus orbiculatus) is listed as a Class C
noxious weed in NC. For more information, see the North Carolina Dept.
of Agriculture web page:



6. Crocosmia (California, USA)
From: Andrea Pickart (andrea_pickart(at)r1.fws.gov)

Does anyone have advice for thick infestations of Crocosmia
crocosmiiflora? (A common name for this is montbretia.)


7. Invasive plants and forest management (Indiana, USA)
From: Ellen Jacquart (ejacquart(at)tnc.org)

I am working with local foresters to increase awareness of invasive plant
species. I hope they can be early detectors for plant invaders, similar to
how they already are detectors for insect invasives. I have a chance to
speak at an IN/OH SAF meeting in August on this topic and want to make
clear the extent of the problem and what they can do. But I need some

**Does anyone have information on economic impact (actual or potential) of
invasive plants on forestry in the Midwest? No such impacts are included
in Pimental, et. al's 2000 paper on costs of invasives, but there are
certainly forest regeneration problems in the midwest due to Japanese
honeysuckle, mile-a-minute vine, and others.

**Does anyone know of existing best management practices documents for
forestry regarding invasive plant species (e.g. minimizing soil
disturbance, seeding bare areas to non-invasive plants, importance of
follow up control efforts, etc.)


8. Caterpillar predation on Ailanthus (Pennsylvania, USA)
From: Robert O'Neill (roneill(at)gfnet.com)

I just wanted to drop you a line to inform you about something I witnessed
around July 2002, while cutting invasive exotic vines in Wissahickon Park
in Philadelphia.

I saw a small grove of Ailanthus altissima (tree if heaven) saplings in a
small clearing beneath the forest canopy that were clearly stressed and
struggling. This caught my eye as I have never seen a place that Ailanthus
wouldn't thrive! The terminal leaflets of the seedlings were being
consumed by a small caterpillar no bigger than an inch long. I did not
take a caterpillar for identification (but I could if I see this occurring
again). Could it be used in the biological control of Ailanthus? Has
anyone else reported anything like this? Is this significant?


9. Leafy spurge woes (Illinois, USA)
From: Debra Nelson (dnelson(at)dnrmail.state.il.us)

I have been fighting leafy spurge at Volo Bog SNA (in Illinois) for two
years now. Originally it looked like an isolated population which I
treated aggressively with RoundUp and also 3% Garlon 3A (which immediately
top kills the plants and probably prevent seed production but may not kill
it completely).

This year I discovered 3 new populations in the vicinity, one of which was
along the side of the road near Volo. I have also now noted that a fairly
large population is thriving along the side of the road near Chain O'Lakes
State Park. These side-of the-road populations concern me because of the
potential for roadside mowing to occur just as the plants are setting
seed, spreading it far and wide. I have contacted staff at McHenry County
Conservation District, maybe we still have a fighting chance against this
scourge. Please be on the lookout for this plant which should be treated
immediately to prevent seed production. It spreads very quickly and is
very difficult to eradicate.

I would appreciate input from anyone who has observed it elsewhere in the
NE Illinois area, especially if they have found a successful way to treat


10. Web site additions (Global, Planet Earth)
From: Barry Rice (bamrice(at)ucdavis.edu)

Mandy Tu has posted a marvelous new species management document (Species Management Summary) on
Elaeagnus angustifolia at:

Meanwhile, I have updated the web site's listing of upcoming meetings,
which is hopping with new entries! Be there, or be square:

Updated August 2003
©The Nature Conservancy, 2003