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June 2005
- Salvinia molesta continues to spread in Louisiana! An established population of giant salvinia was found in a location canal, just south of Lake Salvador, in the Lafourche Parish. This is the first report of this species within the county and the East Central Louisiana Coastal drainage. However, S. molesta is not a new resident of the lower west Louisiana area, having been reported from Houma in 1999.
March 2005
- Giant salvinia located again in the Upper Ocmulgee drainage, this time in Bibb County, after an apparent elimination of the first, 1999, populations in Gwinnett and Lamar Counties. This new occurrence finds a small pond in Macon completely covered with both Salvinia molesta and Eichhornia crassipes.
December 2004
- Salvinia molesta breaks the silence in Louisiana! It has been three years since giant salvinia was discovered in a new Louisiana drainage...until now. Giant salvinia has been reported in the Upper Calcasieu drainage in Fenton, Louisiana. This is the first documented occurrence of this species in the drainage and for the Jefferson Davis Parish.
November 2004
- Biological Control of Giant Salvinia – After establishing the salvinia weevil and proving its ability to control Salvinia molesta in Louisiana and Texas, Phil Tipping, USDA/ARS now draws the five year study to completion. As pictured in October, the research sites show dramatic change!
Nelson Pond - Before Nelson Pond - After
Cypress Bend - Before Cypress Bend - After
Salvinia molesta - Final biocontrol research report
- Biological Control of Common Salvinia – Thanks to last minute funding, the common salvinia work in Lafitte, Louisiana will continue another year. “I think we have established the Florida population of the salvinia weevil there, but now it’s just a numbers game as we strive to ‘Florida-ize’ their common salvinia problem”, reports Phil Tipping, USDA/ARS. All sites show a decrease in biomass with a greater decline present in the release sites.
See more at Salvinia minima - Biocontrol research report
- State surveys in northeastern Mississippi report new Salvinia minima infestations. Aberdeen and Columbus Lakes now host large populations of common salvinia. These lakes as well as many other waterbodies are linked by the Tennessee-Tombigbee Waterway. The complete extent of common salvinia through the Tombigbee is pending further ongoing survey.
October 2004
- Common salvinia pops up in a new drainage region of Mississippi! A third southern Mississippi waterbody is now infested with this unwelcome resident. Salvinia minima was discovered in abundance in Pike County, along the northeast margins of Lake Tangipahoa in Percy Quin State Park in October.
- Late summer rains have flooded clumps of giant salvinia out of Toledo Bend Reservoir and into adjacent streams, sloughs and other low lying areas. This migration hasn’t gone without the notice of residents who have been reporting the encroachment of plants onto their property. Louisiana Wildlife and Fisheries is working with Toledo Bend to manage these populations. Meanwhile, on the west side of the lake, Texas Parks and Wildlife has been working to educate lake users about giant salvinia and the risk it poses to neighboring lakes, notably Sam Rayburn Reservoir, located only 13 miles (20 km) to the west. Howard Elder (TPWD) has released a public advisory that can be downloaded here for local distribution. (Salvinia Advisory.pdf)
- In case you haven’t heard ...,
Did you know that Mexico has been battling Salvinia molesta since July 2003, when infestations in the Lower Colorado River first crossed the Arizona border into Sonora. In Mexico it poses problems in the Morelos Dam at Mexicali and in the Independencia and Matamores irrigation canals. The Lower Colorado River Giant Salvinia Task Force has an informative website focused on the control and monitoring of this species in the Lower Colorado River, both in the United States and Mexico. To find out more visit their website.
September 2004
- For a summary of biological control efforts read the recent article "Tiny Weevil Beats Back Giant Salvinia" in the Agricultural Research Magazine published by the USDA ARS. (html) (pdf)
August 2004
- Salvinia molesta new to Virginia! Giant salvinia makes its first appearance in the state at a small pond in the North Fork Shenandoah drainage which shares a border with West Virginia.
- After a silent period of five years, Salvinia molesta strikes again in Mississippi. In 1999, giant salvinia was both discovered and extirpated at a small farm pond in the Upper Leaf River drainage. Now more than 40 acres of a marshy lake system have become infested, less than one mile northeast of the Leaf River, in the Lower Leaf drainage.
- After five years of battle with Salvinia molesta, Lake Wilson, Hawaii is almost Salvinia free. For more information and pictures about this remarkable success story visit the Hawaii Department of Land and Natural Resources' website. Also, check out these before and after photos of a portion of Lake Wilson taken by HI DLNR.
- See latest article by Shannon Tompkins, Houston Chronicle. Shannon's writing has captured the attention of a segment of the public we might never have reached via the internet. Thanks and appreciation are extended for his work! Local news from the Houston Chronicle.
- Eight South Carolina summers have come and gone with no news of Salvinia molesta … until now. Appearing for the first time since the first US population was both discovered and extirpated in 1995, giant salvinia has reappeared in the same drainage, this time occurring farther south, near coastal marshes in Jasper County.
- Cyrtobagous salviniae proves to be an effective biological control agent of Salvinia molesta in West Africa. Read the journal article to find out more.
Pieterse, A. H., Kettunen, M., Diouf, S., Ndao, I., Sarr, K., Tarvainen, A., Kloff, S. and Hellsten, S. (2003). Effective biological control of Salvinia molesta in the Senegal River by means of the weevil Cyrtobagous salviniae. Ambio 32(7):458-462.
July 2004
- Salvinia molesta makes its second appearance in Fort Bend County, Texas.
- Summer in North Carolina brings news of another Salvinia molesta discovery, appearing for the first time in the Black drainage basin at a private pond near Delway.
June 2004
- Biological Control of Giant Salvinia – Integrated approach adopted at Louisiana golf course pond and weevils prevail in Texas. S. molesta report
- Biological Control of Common Salvinia in Louisiana – Favorable weevil reproduction and consistent salvinia damage observed. S. minima report
- Salvinia molesta discovered in a second canal in Naples, Florida, just a few miles south, yet separate from the original Airport Road location.
- Summer begins with news from the Peach State of Salvinia molesta inhabiting a third, new drainage basin, this time at a 9-acre private pond near Claxton, Georgia.
May 2004
- April trip finds weevils arresting Salvinia molesta in Texas; Louisiana receiving an integrated approach. S. molesta report 10 May
- Weevils released at Jean Lafitte, LA field nursery site. S. minima report 10 May
April 2004
- Biological Control Project Updates: Biological Control of Giant Salvinia in Texas and Louisiana - Early spring finds low weevil numbers and winter damaged salvinia poised for a rebound, all as expected for the time of the year.
- Biological Control of Common Salvinia in Louisiana – Salvinia mats found broken and scattered; forest sites are eliminated as spring efforts focus on natural area research site.
S. molesta report, S. minima report
March 2004
- Salvinia minima recorded new to Escambia County, Florida.
February 2004
- Citizen vigilante reports Salvinia molesta abounding in a backyard water garden, Ft. Lauderdale, Florida. USDA, ARS biologists initiated removal and Florida DEP and DACS biologists have intervened, yet disappointment lies in the fact that plants were probably removed by a landscaping contractor and have likely been disseminated among many other home gardens in Dade County.
November 2003
- Curious about the battle between Salvinia and the weevils? Check out Phil Tipping's final reports for this year's biocontrol study. S. molesta, S. minima
- Salvinia molesta makes its second appearance in Shelby County, TX, just west of Toledo Bend Reservoir.
October 2003
- No more anticipation - catch Phil Tipping's biological control reports for August and September! S. molesta, S. minima
- The story of Salvinia molesta at Enchanted Lake, Oahu, Hawaii - Photo Series.
August 2003
- Salvinia weevil suppresses giant salvinia to an undetectable level by July at Louisiana release site (PowerPoint -1.7mb
 or Low Resolution Images 1 | 2 | 3) - encouraging results concurrently recorded in Texas. "We have finally turned a corner. The sustainable suppression of giant salvinia is just a matter of time and a question of numbers."
Link to Biocontrol Notes by Phil Tipping, USDA-ARS. 4 Aug.
- Pumping saline water controls Salvinia molesta in Louisiana coastal bayou. 1 Aug.
July 2003
- Not observed in Georgia since 1999, Salvinia molesta has resurfaced in the Peach State, this time at a pond in the Lower Ogeechee drainageof the Georgia coastal plain - Georgia DNR rush to treat the site.
- Salvinia molesta discovered in North Carolina at a natural marshy area near previously infested golf course ponds in the Lower Cape Fear drainage, as officials begin tackling all infestations with herbicide. 21 July
- Excitement brews over rotting Salvinia molesta and striking differences between weevil and control plots.
Link to Biocontrol Notes. 02 July
- Lone brown weevil heralds augmentation in June releases on Salvinia minima.
Link to Biocontrol Notes. 02 July
June 2003
- Rebounding for at least four consecutive years, Salvinia molesta displays heavy early summer growth in Florida at the Naples Airport Rd. canal.
- Cultivation of Salvinia molesta continues to be uncovered in states such as Florida, where it is legally prohibited.
May 2003
- Salvinia molesta appears at new locations on Oahu Islandand is also found on a new Hawaiian island. 17 May
- Louisiana Dept. Wildlife & Fisheries and USDA-APHIS report release of Australian salvinia weevils, Cyrtobagous salviniae, in wetlands near Houma, LA. 11 May
Local news from The Times-Picayune.
April 2003
- Salvinia minima is expanding its range in the Lower St. Johns drainage in Clay County, Florida. A subdivision retention pond is completely covered after only a short period of time. 29 Apr.
- USDA Entomologist Dr. Phil Tipping and cooperating agency biologists were pleased to report successful over-wintering and springtime mating of the salvinia weevil on giant salvinia at ongoing trials in Texas and Louisiana. Similar trial sites on common salvinia in Louisiana were not as positive, however the establishment of weevils at these sites will be aggressively pursued through new releases and the creation of an outdoor nursery. 1 Apr.
Access this year’s full spring reports of ongoing trials here:
March 2003
- Salvinia molesta continues its spread in the Buffalo-San Jacinto drainage with the latest report just east of Houston in Channelview, TX in a private pond. This population is established and has been present for at least one year.
February 2003
- Especially large, mature plants of Salvinia molesta found in the Lower Colorado River near Yuma, Arizona.
- Salvinia molesta now completely covers the 300-acre Lake Wilson, and Hawaii struggles to clear this species from the lake. Local news from the Honolulu Advertiser describes their battle with Salvinia. 19 Feb.
January 2003
- The earliest record of Salvinia molesta in Lake Wilson, Hawaii described less than one acre of plants in the spring of 1999. Local news from the Honolulu Advertiser now describes an infestation of economic and environmental concern. 16 Jan.
- December’s storms in southern Louisiana caused extremely high flood conditions that washed Salvinia molesta out of the Cameron Canal and into an extensive marsh system that could easily affect hundreds of acres. 9 Jan.
December 2002
November 2002
- Mississippi hosts new attention catching hotspots with Salvinia minima: Stennis Space Center and St. Catherine Creek National Wildlife Refuge. 25 Nov.
- Salvinia minima found moving north to the Ocmulgee River drainage of south central Georgia. 1 Nov.
September 2002
- Biological Control Research Report:
Damage found severe at all release sites. 01 Oct.
- Salvinia minima found upstream of last years discovery in southwest Alabama. 25 Sept.
- Salvinia molesta appears at a new outdoor learning center in the Galveston area of Texas.
11 Sept.
August 2002
- Late summer finds Salvinia molesta suddenly spreading well beyond the original slough site and deeper into the swamp near Burgaw, on the Northeast Cape Fear River drainage, North Carolina (D. Horkavy and S. Kay, pers. comm.). Spring and early summer surveys uncovered few plants at this same area. The explosive late season growth is typically observed with Salvinia in North America.
- Biological Control Research Report:
Florida Weevils Fortified on Salvinia minima in Louisiana. 18 Aug.
- Biological Control Research Report:
Brazilian weevil Cyrtobagous salviniae continues to grow and spread on Salvinia molesta at release sites. 02 Jul.
July 2002
June 2002
- Biological Control Research Report:
Salvinia Weevil Grows, Spreads and Damages Salvinia molesta at Release Sites. 00 Jun.
- Dr. Stratford Kay, North Carolina State University, found Salvinia molesta reduced in abundance, yet still persisting, at three previously known sites in southeastern North Carolina. The populations have endured repeated herbicide application (diquat dibromide) and at least two years over wintering since first observed in 2000. Dr. Kay collected dotted duckweed, Landoltia (Spirodela) punctata, associated with and entangled in Salvinia molesta at two of the sites. Duckweeds (Lemnaceae) are commonly confused with Salvinia, although they are much smaller in size, lie flat on the surface and have smooth rather then hairy surfaces. Landoltia punctata is the only introduced duckweed in North America; for more information see: http://nas.er.usgs.gov/plants/docs/la_punct.html.
May 2002
April 2002
March 2002
- New map: Co-distribution of Salvinia species in the U.S.
January 2002
- Salvinia molesta reoccurs in Florida at the canal in Naples. 28 Jan.
- FAQs on Biological Control Program from USDA-ARS, Invasive Plant Research Laboratory.
December 2001
- Photo Gallery: Cameron Canal Helicopter Survey, Cameron Parish, Louisiana. 26 Dec.
- 8-10 inches of rain at Toledo Bend Reservoir has flushed giant salvinia from adjacent creeks into the lake proper. Texas Parks and Wildlife informs us that localized concentrations of new plants, especially on the Texas shoreline, represent the flushed out populations. This is not a sign of increased growth on the lake, temperatures have been too low for substantial regrowth at this time of year. 19 Dec.
- Cameron Parish, Louisiana infestation more extensive than first observed. Salvinia molesta stretches 6.5 miles along the canal north of Cameron and is interspersed one-half mile through the marsh in shallow ponds along both sides of the Cameron canal. With the return of duck season, caution is raised that hunters take extra care to clean their boats and gear before leaving salvinia infested areas. 18 Dec.
- Biological Control Research Report:
Weevils Recovered and Damage Observed after Initial Releases.
November 2001
- New locale of Salvinia molesta confirmed by Louisiana Department of Wildlife and Fisheries in western, coastal Louisiana. Approximately 10 acres of plants found north of the town of Cameron, in marsh ponds and a canal leading to the Calcasieu ship channel. Connecting Calcasieu Lake with the Gulf of Mexico, the Calcasieu ship channel is seasonally influenced by salt water. Salt inundation is expected to help, along with planned herbicide application, in minimizing plants within the regime. A survey flight over the area will search for infestation in adjacent marshes. 29 Nov.
- Article from the pages of Agricultural Research magazine Attack on Giant Salvinia
October 2001
September 2001
- Buyer Beware: Salvinia molesta auctioned on E-Bay ... "Large clumps, multiply like crazy" ... you've got it, samples purchased!
- Suspect any floating ferns advertised. This time plants were incorrectly called Salvinia natans a temperate, European species rarely accounted for outside of its natural range.
August 2001
- Salvinia molesta has failed to overwinter at Kenilworth Aquatic Gardens, Washington, D.C. where plants were found in a pond last year. Attempts were made September 2000 to remove the species by hand, yet despite that endeavor a number of plants lingered through the autumn. Recent searches of the garden ponds (B. Steury, 23 Aug) and adjacent wetlands (C. Jacono, 26 Aug) were negative for Salvinia this summer. The cold winter temperatures of 2000 likely account for its absence (B. Steury, pers. comm.). 28 Aug.
- Liberty County, Texas hosts a third site infested with Salvinia molesta. Plants were documented at a private pond by USFSW in mid-July. TPWD plans herbicide treatment at the small pond this month. This site lies north of Swinney Marsh, the large wetland complex documented with giant salvinia in 1998. 14 Aug.
July 2001
- Unverified reports from New Mexico turned up plants in commercial greenhouses (Luna, Sandoval and Bernalillo Counties). Nursery inspectors with the New Mexico Dept. of Agriculture spotted the plants, some as items for sale, others tangled in as contaminants. In Sandoval County, they were informed that Salvinia molesta had been part of the inventory for 8-9 years. To this date, giant salvinia has not been found outside of cultivation in the state of New Mexico. 11 July
- Over the past year, many reports from Texas and Louisiana were confirmed to be Salvinia minima, the smaller cousin of Salvinia molesta. Also non-native to the U.S., Salvinia minima often occurs in great abundance. It can be distinguished from giant salvinia by the stalked, divided hairs on the upper leaf surface that are spreading and free at the tips. Divided hairs on the upper surface of Salvinia molesta are joined at the tips. A webpage on Salvinia minima will be forthcoming. 11 July
June 2001
- Texas finds infested pond within a new drainage region (East Fork San Jacinto river drainage) at Splendora, north of Houston. Individual plants there compare to a silver dollar in size. The large plants and luxuriant growth captured in these photos may be attributed to high nutrient levels in runoff from recent rainfall (25 - 40" in one week). Earlier in the month giant salvinia was also found at residential water-gardens south of Houston, where a garden club was unaware that it had been sharing Texas-prohibited plants. 29 June
May 2001
- This update from Rhandy Helton, Texas Parks and Wildlife Department, 23 May 01: "No new reports of giant salvinia in Texas this year follow a hard winter and high rainfall experienced November through March. It looks like water level fluctuation may play an important role in managing giant salvinia, especially on large reservoirs. This winter heavy rainfall flushed plants downstream or stranded them on banks high above the water level at Toledo Bend Reservoir. Our spray crews are just now finding sufficient quantities there to treat. Surveys (Mar-Apr) at Lake Conroe by San Jacinto River Authority found no plants. Surveys by TPWD on Sheldon Reservoir (Apr) likewise found no plants. The real problem expected this year will be at Lake Texana, near Victoria. The Lavaca-Navidad River Authority surveyed there Feb-Mar and estimated 200 acres and lots of water-hyacinth for the salvinia to hide in. TPWD is continuing to conduct biological control pre-release sampling with USDA and is looking towards 2002 for potential release of the salvinia weevil used in Australia."
March 2001
- Heavy spring rains wash giant salvinia from the Auburn University fisheries pond downstream towards Sougahatchee Creek. 19 Mar.
February 2001
- A third pond confirmed for Auburn, Alabama, where Salvinia molesta appears to have survived the coldest winter since 1993. Like the previously reported sites, this one acre pond, at Auburn University, lies in the Sougahatchee Creek drainage, just north of Auburn. 2 Feb., annotated 19 Mar.
January 2001
- Steve Hoyle, NC State Univ. documents Salvinia molesta surviving the coldest December in 80 years at golf course ponds in Wilmington, North Carolina. Top growth was killed, seen here as rust-colored beds over the pond, however, in protected areas along the shoreline, newly developed green leaves were photographed. Photographs were made on Jan. 18, two weeks after low temperatures of 16, 14 and 19 degrees F were successively recorded on Jan. 3, 4, and 5.
October 2000
- Alabama Department of Conservation and Natural Resources chemically treats a new private, 1/4 acre pond the day after it is discovered with giant salvinia in Montgomery County, AL. The plants were distributed through the American Killifish Association. 17 Oct.
- Trinity River National Wildlife Refuge sadly reports Salvinia molesta from Champion Lake, a newly acquisitioned 800 acre forested lake just north of Galveston Bay, in Liberty County, Texas. Situated on the west side of the Lower Trinity River, this site is separate from the Swinny Marsh, a large infestation just east of the river, and represents a new source of contamination in the western portion of a vulnerable marshy drainage that is highly valued for the habitat it provides to wintering and migrating waterfowl. 01 Oct.
- North Carolina Weed Alert! by Stratford Kay, NC State Univ. 02 Oct.
September 2000
- Disturbing news as Salvinia molesta is discovered in three areas of southeastern North Carolina. Infestations are located a swampy woodland slough, in golf course ponds, and in a private pond and adjacent wet woods in the low lying coastal regions of the North East Cape Fear River and the New River drainages. 28 Sept.
- The source of reoccurring plants in the Naples, Florida canal appears to have been found. 27 Sept.
- Federal botanists and administrators armed with nets and garbage bags attempt to clean up Salvinia molesta in an ~ 300 square meter ornamental pond at Kenilworth Park and Aquatic Gardens. Belonging to the National Park Service, Kenilworth consists of 14 acres of ponds and wetlands along the east bank of the Anacostia River in Washington, D.C. Inspection of the Ohio nursery supplying aquatic plants set out earlier this summer in the pond found Salvinia minima and Salvinia oblongifolia, but came up negative for Salvinia molesta, thereby discounting the source of contamination as association with other water garden plants. Biologists on-site will check for overwintering at this northeastern location. 9 Sept.
August 2000
- Over 1200 acres of giant salvinia have been killed at Toledo Bend Reservoir in the past year. Biologists there report about 95% efficacy with a fine tuned foliar herbicide treatment. Extensive acreages still remain, including mats large enough to see by aerial survey. Contact Rhandy Helton for details on the foliar herbicide mixture. 31 Aug.
- Fishing pond adjacent to Lake Conroe, TX found infested with Salvinia molesta - a reminder of the difficulty in containing this floating aquatic weed. 8 Aug.
- Several months following the last application in a series of herbicide treatments, giant salvinia could not be found at any of the four previously confirmed ponds in Alabama; inspections conducted by Alabama Department of Conservation and Natural Resources. 7 Aug.
July 2000
- 25 acres of Salvinia molesta discovered under an extensive canopy of American lotus in Sheldon Reservoir, Sheldon Lake State Park, Houston. This is the fourth public waterbody in Texas known to harbor giant salvinia. 31 July
- Giant salvinia expands tremendously with summer heat at Toledo Bend Reservoir, TX. 14 July
June 2000
May 2000
- Lake Conroe Association organizes "Adopt a Shoreline" volunteer monitoring program and Aquatic Plant Management Fund for combating giant salvinia.
- Lake Conroe photo gallery
- Sales of Salvinia molesta continue at commercial nurseries, both where prohibited and where permitted. Although a Federal Noxious Weed, its possession and sale is prohibited by few U.S. states.
- Monitoring along Edie Creek, Georgia founds no sign of giant salvinia surviving the winter. Georgia Dept. of Natural Resource will continue to survey through the season.
April 2000
- With water temperatures at 75 degrees F, spring regrowth of giant salvinia is phenomenal at Toledo Bend Reservoir. 19 Apr.
- Salvinia molesta confirmed at Lake Conroe, Texas, a 21,000 acre public impoundment on the West Fork San Jacinto River. Infestation of approximately 35 acres confined near the north end of the lake. Herbicide application ongoing. 04 Apr.
March 2000
- Giant Salvinia Task Force announces meeting in Houston, Texas (11- 12 April) to discuss status and eradication progress and to chart future directions necessary for containing Salvinia molesta.
- Constructing barrier and raising funds for control, Texan homeowner attempts to reduce spread of giant salvinia from neighborhood pond into nearby creek - most Texas infestations occur in private waterbodies, typically sites where public funds are not expendable. 02 Mar.
January 2000
- Second find in Naples, Florida restricted to a 5 acre retention pond where giant salvinia had been placed just days before the discovery. Visible plants removed. 20 Jan.
December 1999
- Texas Parks and Wildlife Department's year end figures for chemical treatment of giant salvinia: Toledo Bend Reservoir - 297 acres, Lake Texana - 22 acres. 15 Dec.
- Giant salvinia reported in Georgia at impoundments along a tributary of the upper Ocmulgee River drainage, Lamar County. 03 Dec.
October 1999
- Georgia Department of Natural Resources encounters giant salvinia at ponds in Gwinnett County, northeast of Atlanta.
September 1999
- Small patch of giant salvinia found in ponded, non-flowing portion of the San Diego River, CA. Intensive eradication efforts by California Department of Food and Agriculture, Integrated Pest Control begins within the week. 20 Sept.
- Multiagency survey of the Lower Colorado River, associated backwaters and canals describes S. molesta infestation as moderate throughout the Palo Verde Irrigation Drain and low to trace in the Colorado River, below the outflow of the Palo Verde Drain. Presented by Bureau of Reclamation at the Arizona-California Giant Salvinia Task Force Meeting. 20 Sept.
- Alabama Department of Conservation and Natural Resources and US Army Corps of Engineers chemically treat a pond near Uchee Creek, Seale, AL to control a dense population of giant salvinia. 01 Sept.
August 1999
- Texas announces infestation of a second public reservoir with giant salvinia, Lake Texana. 28 Aug.
- Lower Colorado River Rapid Response Team formed. 10 Aug.
- Salvinia molesta collected in the lower Colorado River, Imperial National Wildlife Refuge, Arizona/California. 04 Aug.
- New reports continue at private lakes and ponds in southeast Texas.
July 1999
- Giant salvinia in Auburn, Alabama no longer contained after plants found downstream following July flood. 20 July
- Garden center pond in Oklahoma City observed overflowing with giant salvinia into nearby ditches.
- Impounded creek in northcentral Texas constitutes naturalization in new Texas ecoregion.
- Giant salvinia found for sale at 37 towns in 12 California counties.
- Aquatic Plant Management Society holds special session on Salvinia molesta featuring lectures from experts Dr. David Mitchell and Dr. Mic Julien.
June 1999
- USDA-ARS, Ft. Lauderdale, Florida initiates experimental releases of the salvinia weevil (Cyrtobagous salviniae), biological control agent for salvinia, at three east Texas locations: a pond in the Swinney Marsh complex; another near Cow Bayou; and a beaver dam on Toledo Bend Reservoir. The more than 800 weevils released were collected from Salvinia minima in Florida. 29 June
(Adverse conditions including floods, drought and accidental destruction of the salvinia at these sites resulted in abortion of experimental trials. Ed. note Dec 2001).
- Louisiana Department of Wildlife and Fisheries starts herbicide operations along the Louisiana shoreline of Toledo Bend Reservoir. 01 June
May 1999
- Mississippi Department of Wildlife, Fisheries and Parks applies initial herbicide treatment at Moselle pond. 14 May
- Herbicide operations begin along the Texas shoreline of Toledo Bend Reservoir with crews from Texas Parks and Wildlife Department. 12 May
April 1999
- Governor’s Office, State of Louisiana holds briefing on giant salvinia, Baton Rouge, LA. 30 Apr.
- Volunteer Efforts at Enchanted Lake, Hawaii: Natural resource biologists and local residents organize to mechanically remove plants. Local hardware store provided rakes and screens that were cabled together to sift plants from open water areas. Efforts aimed at restoring habitat for endangered nesting waterbirds. 21 Apr
- CNN Headline News runs video segment by Texas A&M University in Bryan, TX. 16 Apr.
- Southern Plant Board, meeting in Fayetteville, Arkansas, unanimously resolved to urge USDA, APHIS, PPQ to develop a national detection survey plan for giant salvinia and to encourage individual states to adopt and implement this survey plan and to develop and support eradication if warranted. 14 Apr.
- First Report from Hawaii, Enchanted Lake. 10 Apr.
- First Report from Mississippi, Moselle pond and adjacent ditch. 01 Apr
March 1999
February 1999
- First Report from Florida. Canal in Naples, FL continues under chemical treatment.
January 1999
- First Report from Alabama, Auburn pond.
- Drawdown at Toledo Bend Reservoir reduces winter population.
December 1998
November 1998
September 1998
- Discovery at Toledo Bend Reservoir, Louisiana.
July 1998
- Infestations found at Texas farm ponds.
- One time collection made at Bayou Teche, Louisiana.
May 1998
Authors: C.C. Jacono, M. M. Richerson
Updated: 06 July 2005
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