Concentration–Exposure Time Relationships for Controlling Sago Pondweed (Stuckenia pectinata) with Endothall

Slade, Jeremy G.; Poovey, Angela G.; Getsinger, Kurt D.

doi:10.1614/wt-07-121.1

Cited by 4 publications

(2 citation statements)

References 14 publications

(24 reference statements)

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“…Conversely, water stargrass and sago pondweed were significantly reduced 6 WAT, but by 52 WAT the occurrence of these species returned to pretreatment levels. These species are considered more tolerant of endothall (Skogerboe and Getsinger 2002, Skogerboe et al 2008, Slade et al 2008. Other native species, such as elodea, leafy pondweed, and white water-buttercup, were not significantly affected by endothall applications.…”

Section: Vegetation Assessmentsmentioning

confidence: 99%

Selective Control of Eurasian Watermilfoil and Curlyleaf Pondweed in Noxon Rapids Reservoir, Montana: Herbicide Small-Plot Evaluations, 2010-2011

Getsinger¹,

Skogerboe²,

Wersal³

et al. 2014

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Noxon Rapids Reservoir, Montana, is one of several large impoundments on the Lower Clark Fork River, stretching for over 48 km (30 miles) with a surface area of ~ 3,120 ha (7,700 acres). Management strategies were evaluated for their effectiveness in controlling invasive plant problems in the reservoir, specifically with Eurasian watermilfoil and curlyleaf pondweed. A 3-year field program was developed to evaluate the effectiveness of aquatic herbicides to selectively control the invasive plants.The herbicide endothall (Aquathol® K) was applied to four plots totaling 5.5 ha (13.6 acres) at 3000 µg ai/L (3 ppm); diquat (Reward®) was applied to four plots totaling 3.3 ha (8.1 acres) at 370 µg ai/L (0.37 ppm); and a combination of both products was applied to four plots totaling 4.7 ha (11.5 acres), with endothall at 1500 µg ai/L (1.5 ppm) and diquat at 190 µg ai/L (0.19 ppm). Herbicides were applied by boat using a variabledepth injection system. Aqueous herbicide dissipation was monitored in selected plots. Bulk water exchange processes were also measured. Quantitative surveys were conducted in each plot to assess the plant community at pretreatment, and at 6 weeks and 52 weeks post treatment.Treatments provided significant reductions in Eurasian watermilfoil (59-69%) and curlyleaf pondweed (40-60%), through 52 weeks post treatment. Both products provided some degree of selective control, with a variety of native plants surviving the treatments. DISCLAIMER:The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE ORIGINATOR.

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Section: Vegetation Assessmentsmentioning

confidence: 99%

Selective Control of Eurasian Watermilfoil and Curlyleaf Pondweed in Noxon Rapids Reservoir, Montana: Herbicide Small-Plot Evaluations, 2010-2011

Getsinger¹,

Skogerboe²,

Wersal³

et al. 2014

Self Cite

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“…The concentration of endothall in the water and the length of time plants are exposed to endothall (exposure time) determine the effectiveness of endothall against the target weeds [ 15 , 21 ] and the toxic effect on any non-target organism. Once applied, the aquatic ecosystem is exposed to endothall until it is completely removed by natural degradation processes or dissipation.…”

Section: Introductionmentioning

confidence: 99%

Sediment Facilitates Microbial Degradation of the Herbicides Endothall Monoamine Salt and Endothall Dipotassium Salt in an Aquatic Environment

Islam

Hunt

Liu

et al. 2018

IJERPH

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Endothall dipotassium salt and monoamine salt are herbicide formulations used for controlling submerged aquatic macrophytes and algae in aquatic ecosystems. Microbial activity is the primary degradation pathway for endothall. To better understand what influences endothall degradation, we conducted a mesocosm experiment to (1) evaluate the effects of different water and sediment sources on degradation, and (2) determine if degradation was faster in the presence of a microbial community previously exposed to endothall. Endothall residues were determined with LC-MS at intervals to 21 days after endothall application. Two endothall isomers were detected. Isomer-1 was abundant in both endothall formulations, while isomer-2 was only abundant in the monoamine endothall formulation and was more persistent. Degradation did not occur in the absence of sediment. In the presence of sediment, degradation of isomer-1 began after a lag phase of 5–11 days and was almost complete by 14 days. Onset of degradation occurred 2–4 days sooner when the microbial population was previously exposed to endothall. We provide direct evidence that the presence and characteristics of sediment are of key importance in the degradation of endothall in an aquatic environment, and that monoamine endothall has two separate isomers that have different degradation characteristics.

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Classifying nuisance submerged vegetation depending on ecosystem services

Verhofstad

Bakker

2017

Limnology

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Throughout the world, mass development of native and non-native submerged macrophytes leads to nuisance problems for humans. However, often neither the type of nuisance nor the characteristics of nuisance vegetation have been uniformly quantified, leaving nuisance vegetation as a largely unsubstantiated qualification. The lack of a consensus about when submerged plants cause nuisance hampers comparative research on the environmental conditions leading to nuisance. Furthermore, defining and evaluating management goals to reduce nuisance caused by submerged plants are not possible when characteristics of the nuisance vegetation remain unquantified. In this study, we performed a literature review and gathered stakeholder information to identify (1) which problems are caused by nuisance submerged macrophytes, (2) which plant characteristics underlie 'nuisance' and (3) and which species cause nuisance. We (4) synthesised this information into a framework to classify submerged vegetation as either 'nuisance' or 'non-nuisance' using a case study to illustrate the principles. We found that most nuisance problems that affect human use of the ecosystem can be grouped into problems for boat traffic, swimming, fishing and hydrological functioning of the system. Additionally, a multitude of ecological effects have also been reported, but these were outside of the scope of this study. Vegetation cover and canopy depth below the water surface are the main determinant characters for nuisance. Therefore, both invasive and native eutrophilic species with a vertical growth strategy are particularly problematic, but other species can also cause nuisance.

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Concentration–Exposure Time Relationships for Controlling Sago Pondweed (Stuckenia pectinata) with Endothall

Cited by 4 publications

References 14 publications

Selective Control of Eurasian Watermilfoil and Curlyleaf Pondweed in Noxon Rapids Reservoir, Montana: Herbicide Small-Plot Evaluations, 2010-2011

Selective Control of Eurasian Watermilfoil and Curlyleaf Pondweed in Noxon Rapids Reservoir, Montana: Herbicide Small-Plot Evaluations, 2010-2011

Sediment Facilitates Microbial Degradation of the Herbicides Endothall Monoamine Salt and Endothall Dipotassium Salt in an Aquatic Environment

Classifying nuisance submerged vegetation depending on ecosystem services

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