Small-Plot, Low-Dose Treatments of Triclopyr for Selective Control of Eurasian Watermilfoil

Poovey, Angela G.; Getsinger, Kurt D.; Skogerboe, John G.; Koschnick, Tyler J.; Madsen, John D.; Stewart, Robert

doi:10.1080/07438140409354161

Cited by 12 publications

(13 citation statements)

References 10 publications

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“…Small-plot treatments of triclopyr conducted on Lakes Minnetonka and Minnewashta (MN, USA) to investigate the herbicide's potential to selectively control Eurasian watermilfoil demonstrated that larger contiguous areas, higher triclopyr rates, and sequential applications might be required to enhance Eurasian watermilfoil control in small-plot partial lake treatments (Poovey et. al., 2004).…”

Section: Treatment / Restorationmentioning

confidence: 99%

Lake and Reservoir Management

Bhatti¹

2005

Water Environment Research

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A number of scientific journals published findings of numerous research studies and investigations in the year 2004 on the subject of lake and reservoir management. Two journals were exclusively attributed to lake and reservoir management, namely, Lake and Reservoir Management published by the North American Lake Management Society (NALMS) and Lakes and Reservoirs; Research and Management, an official journal of the International Lake Environment Committee (ILEC). In this review, an attempt was made to cover, as much as possible, all topics directly related to the management of lakes and reservoirs. In addition, efforts were made to cover a diversity of studies on the lake and reservoir ecology, as related to nutrients, limnology, eutrophication, etc., however, papers of pure scientific nature on microbial isolation, enumeration, characterization, and population dynamics were not included. MANAGEMENT AND PLANNING ISSUESThrough a state-wide survey, Gabriel and Lancaster (2004) compared the characteristics of lake associations and lake districts in terms of their management objectives, issues, activities, and use of funds and also examined the relationship between management activities and their effectiveness. In a case study of Winnebago System (Wisconsin USA), results of public survey indicated that there was need for a public education program that focused on publicizing the 2384 technical limitations of lake level regulation to reduce hazard losses (Gabriel, 2004). Another case study in reallocation of a multipurpose federal reservoir revealed substantial discrepancies between benefits and costs evaluated in accordance with the full set of federal planning principles and abbreviated procedures historically used when the scope and scale of reallocation became large (McMahon and Farmer, 2004).In a conservation and improvement study of the environment in dam reservoirs, latest developments following dam construction and the concrete measures taken by dam constructors to follow the regulations concerned in Japan were described (Harada and Yasuda, 2004). Examination of land use controls in the Lake Biwa watershed from the perspective of environmental conservation and management demonstrated that the continued existence of farmland and forests, in conjunction with urban sprawl, in the urbanization promotion areas and the use districts, resulted in serious land use problems which were seriously aggravated in the south-eastern and north-eastern parts of the watershed (Yamamoto and Nakamura, 2004).A study used data from the Urmia region in Iran to develop a rule for evaporation correction during reservoir planning and presented a methodology to use the rule (Montaseri and Adeloye, 2004). A conceptual model, the nearshore shunt, to describe a fundamental redirection of nutrient and energy flow consequent to dreissenid establishment suggested that the nearshore shunt would require even more stringent phosphorus (P) management for lakes strongly impacted by dreissenids to maintain nearshore water quality (Hecky et al., 200...

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Section: Treatment / Restorationmentioning

confidence: 99%

Lake and Reservoir Management

Bhatti¹

2005

Water Environment Research

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“…Herbicides were not applied as tank mixes. Application rates were based upon results of the initial water-exchange evaluations described below, and previously developed herbicide CET relationships (Netherland et al 1991;Netherland and Getsinger 1992;Poovey et al 2002Poovey et al , 2004Skogerboe and Getsinger 2002). On 23 July, Plot 1 was treated evenly with dye, with the application starting at 0833 hr and ending at 0932 hr.…”

Section: Methodsmentioning

confidence: 99%

“…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: 99%

“…Over the past 20 years, operational-scale treatments at various locations across the United States have verified that the linkage of water-exchange information, herbicide CET relationships, and innovative application techniques greatly improve management of Eurasian watermilfoil and hydrilla (Hydrilla verticilla Royle) in large lakes, reservoirs, and rivers Poovey et al 2004). Based on these field verifications, new standards have been developed for the environmentally sound management of submersed weeds in many areas of high water exchange previously proclaimed "unmanageable."…”

Section: Objectivesmentioning

confidence: 99%

“…These nominal rates were 1850 µg/L (1.85 ppm) triclopyr and 2500 µg/L (2.5 ppm) endothall in Plot 1, and 1300 µg/L (1.3 ppm) triclopyr and 1890 µg/L (1.89 ppm) endothall in Plot 3. Selected application rates were based upon results of the initial water-exchange evaluations (Chapter 2) and previously developed herbicide CET relationships for endothall and triclopyr against the target plants ( Netherland et al 1991;Netherland and Getsinger 1992;Poovey et al 2002Poovey et al , 2004Skogerboe and Getsinger 2002).…”

Section: Plot Treatments -Dye and Herbicidesmentioning

confidence: 99%

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

Getsinger¹,

Skogerboe²,

Madsen³

et al. 2013

Self Cite

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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.

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Runoff of the herbicides triclopyr and glufosinate ammonium from oil palm plantation soil

Tayeb

Ismail

Jansar

2017

Environ Monit Assess

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This study focused on the residue detection of the herbicides triclopyr and glufosinate ammonium in the runoff losses from the Tasik Chini oil palm plantation area and the Tasik Chini Lake under natural rainfall conditions in the Malaysian tropical environment. Triclopyr and glufosinate ammonium are post-emergence herbicides. Both herbicides were foliar-sprayed on 0.5 ha of oil palm plantation plots, which were individualized by an uneven slope of 10-15%. Samples were collected at 1, 3, 7, 15, 30, 45, 60, 90, and 120 days after treatment. The concentrations of both herbicides quickly diminished from those in the analyzed sample by the time of collection. The highest residue levels found in the field surface leachate were 0.031 (single dosage, triclopyr), 0.041 (single dosage, glufosinate ammonium), 0.017 (double dosage, triclopyr), and 0.037 μg/kg (double dosage, glufosinate ammonium). The chromatographic peaks were observed at "0" day treatment (2 h after herbicide application). From the applied active ingredients, the triclopyr and glufosinate losses were 0.025 and 0.055%, respectively. The experimental results showed that both herbicides are less potent than other herbicides in polluting water systems because of their short persistence and strong adsorption onto soil clay particles.

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Small-Plot, Low-Dose Treatments of Triclopyr for Selective Control of Eurasian Watermilfoil

Cited by 12 publications

References 10 publications

Lake and Reservoir Management

Lake and Reservoir Management

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

Runoff of the herbicides triclopyr and glufosinate ammonium from oil palm plantation soil

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