Aquatic dissipation of the herbicide triclopyr in Lake Minnetonka, Minnesota

Getsinger, Kurt D.; Petty, David G; Madsen, John D.; Skogerboe, John G.; Houtman, Bruce A; Haller, William T.; Fox, Alison M.

doi:10.1002/(sici)1526-4998(200005)56:5<388::aid-ps150>3.0.co;2-u

Cited by 25 publications

(39 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in this same period, the community of Maple Plain continued to discharge sewage into the lake through Painter Creek (Murchie, 1985). Currently, Lake Minnetonka is faced with numerous ecological challenges such as shoreline development, increased nutrient loading, and infestation by the invasive aquatic plant species, Myriophyllum spicatum (Eurasian watermilfoil) (Getsinger et al, 2000).…”

Section: Study Areamentioning

confidence: 99%

“…As Lake Minnetonka is a major recreational resource for the Minneapolis-St. Paul region (Getsinger et al, 2000), there is currently a great deal of concern about the increasing frequency of eutrophication episodes that occur therein. However, despite these concerns, no study to date has examined the condition of wetlands in the Lake Minnetonka watershed, or quantified their ability to retain P. Furthermore, Lake Minnetonka is a useful study site, as it is typical of many upper Midwestern hard-water lakes having high biological productivities and underlain by sediment rich in precipitated carbonates (Murchie, 1985).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Assessment of the Phosphorus Retention Capacity of Wetlands in the Painter Creek Watershed, Minnesota, USA

Bruland

Richardson

2006

Water Air Soil Pollut

View full text Add to dashboard Cite

Lake Minnetonka, located in southeastern Minnesota, U.S.A., is currently experiencing increased eutrophication due to excessive phosphorus (P) loading in runoff from agriculture and urban areas. This phenomenon has been exacerbated by the isolation of wetlands in the surrounding watershed from the surface water drainage network. In order to determine if rerouting surface water through these wetlands would be a feasible method for reducing P inputs, we assessed the P retention capacity of wetlands in a subwatershed of Lake Minnetonka, the Painter Creek Watershed (PCW). The objectives of our study were to determine which of 15 different wetland sites in the PCW had the highest P sorption capacity, identify which soil properties best explained the variability in P sorption, and utilize P fractionation to determine the dominant form of soil P. Our results indicated that despite similar vegetation and hydrogeomorphic settings, wetlands in the PCW had considerably different P sorption capacities. Depth-averaged P sorption index (PSI) values showed considerable variability, ranging from 14.6 to 184. The Katrina Marsh, Painter Marsh, South Highway 26, and West Jennings Bay sites had the highest depth-averaged PSIs. The soil properties that best predicted PSI were soil organic matter, exchangeable calcium, and oxalate extractable iron. Phosphorus fractionation data revealed organic P to be the dominant form of soil P, indicating that organic matter accumulation is another P storage mechanism in these wetlands.

show abstract

Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Assessment of the Phosphorus Retention Capacity of Wetlands in the Painter Creek Watershed, Minnesota, USA

Bruland

Richardson

2006

Water Air Soil Pollut

View full text Add to dashboard Cite

show abstract

“…Herbicide concentration exposure time (CET) relationships designed to provide excellent plant control have been developed specifically for Eurasian watermilfoil using triclopyr and endothall alone (Netherland et al 1991, Netherland andGetsinger 1992). Small plot and whole lake studies have verified these CET relationships and documented the efficacy range for herbicide rates, as well as selectively removing Eurasian watermilfoil populations with little to no harm to native plant communities (Getsinger et al , 2000Poovey et al 2004;Wersal et al 2010a). …”

Section: Introductionmentioning

confidence: 92%

Selective Control of Eurasian Watermilfoil and Curlyleaf Pondweed in Noxon Rapids Reservoir, Montana: Aquatic Herbicide Evaluations, 2009-2010

Getsinger¹,

Skogerboe²,

Madsen³

et al. 2013

View full text Add to dashboard Cite

A field demonstration was developed linking herbicide application methods with site-specific water exchange patterns to selectively control infestations of Eurasian watermilfoil (EWM) and curlyleaf pondweed (CLP) in Noxon Rapids Reservoir, MT. Objectives of this work are to evaluate speciesselective control of these invasive plants employing innovative herbicide application techniques; and to provide recommendations for invasive plant management in the reservoir, and similar impoundments in the Pacific Northwest. Bulk water exchange patterns occurring in plant stands selected for herbicide applications were determined using rhodamine WT (RWT) tracer dye. These site-specific patterns were matched with appropriate herbicide application rates required to selectively control target plants. Treatments were conducted using a variable-depth injection system, simultaneously applying RWT and herbicides to provide maximum chemical contact time around plants stands. In late July 2009, two plots (8.2-11.5 ha) were treated using combinations of RWT (10 µg/L), triclopyr (1300 -1850 µg/L), and endothall (1890 -2500 µg/L). Dye (in situ) and herbicide residues (via enzyme-linked immunosorbent assay) were measured through the water column, inside and outside of the plots. Applications were conducted to coincide with the minimum reservoir discharge patterns. Whole plot water exchange half-lives ranged from 16 to 33 hr. Herbicide residues were highest around plants growing in the lower half of the water column (19-48 hr). External herbicide dissipation patterns were below levels of environmental/human health concerns. Treatments provided selective control of EWM for two years (> 85%) and CLP for one year (> 75%). Native plant species richness and dissolved oxygen levels were unchanged in treatment plots during the study period.

show abstract

“…Triclopyr also is used on pastureland in Maryland (Gianessi and Reigner 2006). Triclopyr degrades rapidly by photolysis in surface water, but may persist in groundwater (Ganapathy 1997;Getsinger et al 2000).…”

Section: Potential Sources Of Pesticides and Caffeinementioning

confidence: 99%

The occurrence of glyphosate, atrazine, and other pesticides in vernal pools and adjacent streams in Washington, DC, Maryland, Iowa, and Wyoming, 2005–2006

Battaglin

Rice

Focazio

et al. 2008

Environ Monit Assess

145

View full text Add to dashboard Cite

Vernal pools are sensitive environments that provide critical habitat for many species, including amphibians. These small water bodies are not always protected by pesticide label requirements for no-spray buffer zones, and the occurrence of pesticides in them is poorly documented. In this study, we investigated the occurrence of glyphosate, its primary degradation product aminomethylphosphonic acid, and additional pesticides in vernal pools and adjacent flowing waters. Most sampling sites were chosen to be in areas where glyphosate was being used either in production agriculture or for nonindigenous plant control. The four site locations were in otherwise protected areas (e.g., in a National Park). When possible, water samples were collected both before and after glyphosate application in 2005 and 2006. Twenty-eight pesticides or pesticide degradation products were detected in the study, and as many as 11 were identified in individual samples. Atrazine was detected most frequently and concentrations exceeded the freshwater aquatic life standard of 1.8 micrograms per liter (microg/l) in samples from Rands Ditch and Browns Ditch in DeSoto National Wildlife Refuge. Glyphosate was measured at the highest concentration (328 microg/l) in a sample from Riley Spring Pond in Rock Creek National Park. This concentration exceeded the freshwater aquatic life standard for glyphosate of 65 microg/l. Aminomethylphosphonic acid, triclopyr, and nicosulfuron also were detected at concentrations greater than 3.0 microg/l.

show abstract

Aquatic dissipation of the herbicide triclopyr in Lake Minnetonka, Minnesota

Cited by 25 publications

References 8 publications

An Assessment of the Phosphorus Retention Capacity of Wetlands in the Painter Creek Watershed, Minnesota, USA

An Assessment of the Phosphorus Retention Capacity of Wetlands in the Painter Creek Watershed, Minnesota, USA

Selective Control of Eurasian Watermilfoil and Curlyleaf Pondweed in Noxon Rapids Reservoir, Montana: Aquatic Herbicide Evaluations, 2009-2010

The occurrence of glyphosate, atrazine, and other pesticides in vernal pools and adjacent streams in Washington, DC, Maryland, Iowa, and Wyoming, 2005–2006

Contact Info

Product

Resources

About