Allelopathic aquatic plants for aquatic weed management

New arylpicolinate herbicide chemistry under development for rice, aquatic weed management, and other uses was evaluated using five aquatic plants. The herbicide 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoro-pyridine-2-benzyl ester—also identified as XDE-848 BE or SX-1552 (proposed International Organization for Standardization common name in review; active tradename RinskorTM)—and its acid form (XDE-848 acid or SX-1552A) were evaluated on three dicots: (1) Eurasian watermilfoil (EWM), (2) megalodonta, and (3) crested floating heart (CFH), and two monocots: (1) hydrilla and (2) elodea. A small-scale Organization for Economic Cooperation and Development (OECD) protocol developed using EWM for registration studies was utilized. EWM and megalodonta were also evaluated in larger-scale mesocosms for comparison. In-water concentrations between 0.01 and 243 μg ai L−1as SX-1552 or SX-1552A were applied under static conditions for 14 (growth chamber) or 28 d (mesocosm). EWM was susceptible to both SX-1552 and SX-1552A, with dry-weight 50% effective concentration (EC50) values of 0.11 and 0.23 μg ai L−1under growth chamber conditions. Megalodonta had EC50values of 11.3 and 14.5 μg ai L−1for the SX-1552 and SX-1552A. CFH was more sensitive to SX-1552 (EC50= 5.6 μg ai L−1) than to SX-1552A (EC50= 23.9 μg ai L−1). Hydrilla had EC50values of 1.4 and 2.5 μg ai L−1, whereas elodea was more tolerant, with EC50values of 6.9 and 13.1 μg ai L−1for SX-1552 and SX-1552A, respectively. For EWM mesocosm trials, EC50values for SX-1552 and 1552A were 0.12 μg ai L−1and 0.58 μg ai L−1, whereas the megalodonta EC50was 6.1 μg ai L−1. Activity of SX-1552 on EWM, hydrilla, and CFH merits continued investigation for selective aquatic weed control properties. Results suggest that the OECD protocol can be used to screen activity of herbicides for multiple aquatic plant species.

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Aquatic Weed Management

10.17226/19847 ◽

1979 ◽

Keyword(s):

Weed Management ◽

Aquatic Weed

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Physical Control of Nonindigenous Aquatic Plants in Emerald Bay, Lake Tahoe, CA

Invasive Plant Science and Management ◽

10.1614/ipsm-d-16-00005.1 ◽

2016 ◽

Vol 9 (2) ◽

pp. 138-147 ◽

Cited By ~ 1

Author(s):

Daniel W. H. Shaw ◽

Zachary P. Hymanson ◽

Tamara L. Sasaki

Keyword(s):

Aquatic Plants ◽

Weed Management ◽

Lake Tahoe ◽

Complete Removal ◽

Management Plan ◽

Freshwater Ecosystems ◽

Lessons Learned ◽

Integrated Weed Management ◽

Control Techniques ◽

Physical Control

Establishment of nonindigenous (NI) aquatic plants in the nearshore regions of freshwater ecosystems has resulted in environmental degradation, recreation concerns, economic impacts, and substantial management challenges. To reduce these undesirable effects, NI aquatic plants are often targeted for removal or control by management agencies, but the efficacy of implementation is often not documented or sustained. In this study, we developed a management plan to completely remove all NI plants from Emerald Bay, Lake Tahoe, CA, using only physical control techniques. Management plan priorities were based on previous research and lessons learned, including the need for (1) integrated weed management using multiple physical control techniques, (2) a large initial treatment investment, (3) ongoing early detection and rapid response, (4) detailed ecological monitoring, and (5) a long-term commitment to annual maintenance removal. Application of this management plan resulted in complete removal of all NI aquatic plants from Emerald Bay and substantial cost savings each year after the initial large investment. Annual maintenance removal and monitoring will need to continue as long as NI aquatic plants continue to enter Emerald Bay on boats and currents from other areas of Lake Tahoe.

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Mechanical aquatic weed management in the lower valley of the R�o Negro, Argentina

Hydrobiologia ◽

10.1007/bf00012759 ◽

1996 ◽

Vol 340 (1-3) ◽

pp. 225-228 ◽

Cited By ~ 2

Author(s):

A. Dall'Armelfna ◽

A. Gajardol ◽

C. Bezic ◽

E. Luna ◽

A. Britto ◽

...

Keyword(s):

Weed Management ◽

Aquatic Weed

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AQUATIC WEED MANAGEMENT PRACTICES IN SOME PONDS AND LAKES OF BRAMHAPURI TOWN, DISTRICT CHANDRAPUR (MS)

10.29369/ijrbat.2017.05.ii.0023 ◽

2017 ◽

Author(s):

Wadekar M.B. and Madavi S. Wadekar M.B. and Madavi S. ◽

Keyword(s):

Weed Management ◽

Management Practices ◽

Aquatic Weed

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Grass Carp: A Fish for Biological Management of Hydrilla and Other Aquatic Weeds in Florida

EDIS ◽

10.32473/edis-fa043-2012 ◽

2013 ◽

Vol 2013 (2) ◽

Cited By ~ 2

Author(s):

David L. Sutton ◽

Vernon V. Vandiver, Jr. ◽

Jeffrey E. Hill

Keyword(s):

Aquatic Plants ◽

Grass Carp ◽

Aquatic Weed ◽

Aquatic Weeds ◽

Biological Method ◽

Control Techniques ◽

Biological Management ◽

Growing Conditions ◽

Aquatic Sciences

Abundant growth of aquatic plants causes serious problems in ponds, lakes, rivers, and irrigation and drainage throughout Florida. In some situations, native aquatic plants become weeds, but most often exotic plants introduced from areas outside the state flourish under the favorable growing conditions found in Florida. Long-term economical solutions to Florida’s aquatic weed problems have been elusive and there is a need for control techniques to alleviate aquatic weed problems. This 6-page fact sheet provides information on a biological method, the grass carp, for management of some of Florida’s aquatic weed problems. Written by David L. Sutton and Vernon V. Vandiver, Jr., and published by the UF Department of Fisheries and Aquatic Sciences, November 2012. http://edis.ifas.ufl.edu/fa043

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Introduction of floating gardening in the north-eastern wetlands of Bangladesh for nutritional security and sustainable livelihood

Renewable Agriculture and Food Systems ◽

10.1017/s1742170507002074 ◽

2008 ◽

Vol 23 (2) ◽

pp. 89-96 ◽

Cited By ~ 9

Author(s):

Haseeb Md. Irfanullah ◽

Ahana Adrika ◽

Abdul Ghani ◽

Zakir Ahmed Khan ◽

Md. Abdur Rashid

Keyword(s):

Weed Management ◽

Farming System ◽

Pilot Scale ◽

Aquatic Weed ◽

Sustainable Livelihood ◽

Output Analysis ◽

North East ◽

The North ◽

Feasible Alternative ◽

Floating Platforms

AbstractFloating gardening is a form of hydroponics or soil-less culture. It is an age-old practice of crop cultivation in the floodplains of southern Bangladesh, where aquatic plants such as water hyacinth (Eichhornia crassipes) are used to construct floating platforms on which seedlings are raised and vegetables and other crops cultivated in the rainy season. The platform residue is used in the preparation of beds for winter vegetable gardening. Floating gardening was introduced in 2006 on a pilot-scale in the north-east wetlands of the country, as a contribution to food security and as a supplementary income for the marginalized community. The overall experience of floating cultivation in three selected villages was encouraging. Local people became aware of this new farming system and their level of knowledge improved. Communities were mobilized into groups to make floating platforms, and platform residues were later used to establish winter gardens. Cultivation was successful on both types of plot, and vegetables were both consumed by the producers and sold in the market. The input–output analysis revealed floating gardening to be a feasible alternative livelihood option for the wetland dwellers. The method provided targeted landless people with parcels of land in the monsoon, enabling them to grow vegetables. Floating gardening and associated winter gardening appear to have the potential for introduction to other parts of the world where aquatic weed management is a major problem.

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Autonomous Robotics for Identification and Management of Invasive Aquatic Plant Species

Applied Sciences ◽

10.3390/app9122410 ◽

2019 ◽

Vol 9 (12) ◽

pp. 2410 ◽

Cited By ~ 2

Author(s):

Maharshi Patel ◽

Shaphan Jernigan ◽

Rob Richardson ◽

Scott Ferguson ◽

Gregory Buckner

Keyword(s):

Plant Species ◽

Weed Management ◽

Aquatic Plant ◽

Aquatic Vegetation ◽

Chemical Exposure ◽

Ecological Impacts ◽

Aquatic Weed ◽

Vegetation Control ◽

Invasive Aquatic Plant ◽

Distribution Mapping

Invasive aquatic plant species can expand rapidly throughout water bodies and cause severely adverse economic and ecological impacts. While mechanical, chemical, and biological methods exist for the identification and treatment of these invasive species, they are manually intensive, inefficient, costly, and can cause collateral ecological damage. To address current deficiencies in aquatic weed management, this paper details the development of a small fleet of fully autonomous boats capable of subsurface hydroacoustic imaging (to scan aquatic vegetation), machine learning (for automated weed identification), and herbicide deployment (for vegetation control). These capabilities aim to minimize manual labor and provide more efficient, safe (reduced chemical exposure to personnel), and timely weed management. Geotagged hydroacoustic imagery of three aquatic plant varieties (Hydrilla, Cabomba, and Coontail) was collected and used to create a software pipeline for subsurface aquatic weed classification and distribution mapping. Employing deep learning, the novel software achieved a classification accuracy of 99.06% after training.

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