Fate of hexazinone in forest watersheds.



Publisher: U.S. Dept. of Agriculture, Forest Service, Southern Region in Atlanta, Ga

Written in English
Published: Downloads: 841
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Subjects:

  • Herbicides.,
  • Watersheds.

Edition Notes

SeriesForestry pesticides fact sheet -- no. 1., Forestry bulletin R8 -- FB/P 9., Technology update, Technology update (Atlanta, Ga.)
ContributionsUnited States. Forest Service. Southern Region., United States. Forest Pest Management.
The Physical Object
Pagination[2] p. ;
ID Numbers
Open LibraryOL17832431M

  Hexazinone (Velpar®) In most soils hexazinone is only weakly adsorbed and is thus highly mobile, existing primarily in the soil water column (U.S. EPA ).Degradation of hexazinone in soils and sediments is mainly due to microbial metabolism and photodegradation (U.S. EPA ).The reported half-lives for hexazinone in soil in field studies range from 24 days—1 year (Michael et al. . Effect of burning on hexazinone residues in firewood. In: Proceedings, 39th Annual Meeting of Southern Weed Science Society, January ; Nashville, TN. SWSPBE Related Search. Fate of Picloram and Hexazione in a Cutover Northern Forest After Treatment with Herbicides for Site Preparation. The watershed 4 experiment was designed to study how strip cutting affects nutrient and hydrological cycling and stand regeneration relative to clearcutting. A 3-phase strip cut treatment was carried out in , , and , and included the removal of all merchantable g: hexazinone. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract: Hexazinone (active ingredient) was aerially applied as a pellet (Velpar ULW) and as a liquid,(Velpar L) to watersheds in the Piedmont of Alabama, U.S.A., at the rate of - ’ (three times the prescribed rate for this site). An untreated watershed served as a control.

water samples from a major environmental fate study we conducted on the Ouachita National Forest, Arkansas, but only 10 samples could be processed in one technician-day. Samples from environmental fate studies collected in one day frequently exceed so there is a great need for a method which will accelerate the analysis of these samples. Herbicide Dissipation Studies in Southern Forest Ecosystems. Environmental Toxicology and Chemistry, 12() Keywords: Hexazinone, Imazapyr, Picloram, Sulfometuron methyl, Fate. ornamental plants, forest trees and other non-crop areas. Hexazinone is registered for pre-emergent, post-emergence, layby, directed spray and basal soil applications. It is used as a non-selective herbicide in non-cropland areas and as a selective herbicide in reforestation practices. Hexazinone products are formulated as granulars, pellets. Leaching of radionuclides from decaying vegetation has not been extensively investigated, especially for radionuclides other than {sup }Cs. The authors obtained leaves of blueberry (Vaccinium angustifolium {times} V. corymbosum) that contained over fold ranges in Se, Cs, and I concentrations.

Herbicide fate in New Zealand forest watersheds Four Forests Restoration Initiative effects on water resources Providing the most current information to forest and fire managers on the watershed impacts of wildfires, prescibed fires, and fuels treatments to guide NEPA analyses and management activities.   When his best friend Autumn dares him to take Provo High’s prestigious Seminar—where honor roll students diligently toil to draft a book in a semester—Tanner can’t resist going against his better judgment and having a go, if only to prove to Autumn how silly the whole thing is. Writing a book in four months sounds: Beth O'brien. For several decades, research has been conducted on the fate of forcitry-use herbicides in various watersheds throughout the southern and western l lni tcd Stntcs, Canada, andAustrnlia.‘fhisrcscarch hasevaluatedchemicalssuch as2,4-D,glyphosate, hexazinone,imarapyr,mctsulfuronmethy:picloram,sulfometuronmethyl,tebuthiuron, and triclopyr. Watershed research in the U.S. Geological Survey (USGS) is guided not only by the need to expand basic knowledge of watershed processes but also by the needs of other public and private organizations for a better scientific basis for design and implementation of management programs. Among public Missing: hexazinone.

Fate of hexazinone in forest watersheds. Download PDF EPUB FB2

Fate of hexazinone in southern forest watersheds. Atlanta, Ga.: U.S. Dept. of Agriculture, Forest Service, Southern Region, [] (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: United States.

Forest Service. Southern Region.; United States. Forest Pest Management. Fate of hexazinone in forest watersheds. Atlanta, Ga.: U.S.

Dept. of Agriculture, Forest Service, Southern Region, [] (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: United States. Forest Service. Southern Region.; United States. Forest Pest Management. OCLC Number. Since forested watersheds throughout the Sou sources for high quality municipal and danestic drinking water, there has been considerable concern over the potential for water contsnination with herbicide residues.

Citation: Neary, Daniel G.; Bush, Parshall B.; Michael, Jerry L. Fate of Hexazinone and Picloram in Southern Forest : Daniel G. Neary, Parshall B. Bush, Jerry L. Michael. Fate of hexazinone in forest watersheds. By United States.

Forest Pest Management. and United States. Forest Service. Southern Region. Abstract "May "At head of title: Forest Pest n graphy: p. [2].Mode of access: Internet Topics. Abstract "July "At head of title: Forest Pest n graphy: p. [2].Mode of access: Internet.

This paper highlights the results from several ecosystem fate studies which have evaluated the environmental fate of two commonly used forestry herbicides, hexazinone and picloram. Citation: Neary, D.G.; Bush, P.B.; Michael, J.L. Fate of Hexazinone and Picloram in Southern United States Forest Watersheds.

Hexazinone was stable in incubated stream water requiring several years for 50% disappearance of the compound at 30°C. The maximum hexazinone concentration in the stream that drained the watershed was 14 µg/L, and hexazinone residues (hexazinone transported from the watershed in stream discharge.

Two cutover northern hardwood stands in Baraga County, Michigan, were aerially sprayed with the herbicides hexazinone.

picloram, and 2,4-D to eliminate hardwood stump sprouts prior to conversion to red pine (Pinus resinosa L.). Movement of two of these highly soluble herbicides (hexazinone and picloram) in an entic haplorthod sol1 was measured.

() evaluated the fate of hexazinone in a steep watershed in north-central West Virginia and found that % of the total hexazinone applied to the watershed leached into the local streams, but none of the compound was found in stream sediments.

Hexazinone -Human Health and Ecological Risk Assessment – Final Report Prepared for: USDA, Forest Service Forest Health Protection GSA Contract No. GSFF USDA Forest Service BPA: WO USDA Purchase Order No.: Task No.

20 Submitted to: Hank Appleton, COTR Forest Health Protection Staff USDA Forest Service. Hexazinone (active ingredient) was aerially applied as a pellet (Velpar ULW) and as a liquid (Velpar L) to watersheds in the Piedmont of Alabama, U.S.A., at the rate of kgha-1 (three times the prescribed rate for this site).

An untreated watershed served as a control. The impact of the herbicide, hexazinone, was assessed on aquatic macrophytes, aquatic and terrestrial invertebrate communities within forested watersheds in the Piedmont region of Georgia.

Source: In: Mroz and Trettin, C.C., ed. Forest soils: A resource for intensive forest management: Proceedings Lake States Forest Soils Conference Miscellaneous Publication School of FOrestry and Wood Products, Michigan Technological University Press; In the New Zealand forestry sector terbuthylazine and hexazinone are widely used for weed control, yet little is known about their environmental fate in New Zealand forests.

A catchment scale ( ha) experimental site was established in Pumice soil, recently harvested and replanted with Pinus radiata (D. Don), in a plantation forest in the central North Island, New Zealand. The use of herbicides for weed control in New Zealand planted forestry is important for primary production.

The objective of this study was to assess the environmental fate of terbuthylazine and hexazinone in a Recent Soil following an aerial post-plant herbicide application in a New Zealand planted forest.

Soil and forest litter were collected from four plots within a recently harvested and. Environmental fate of terbuthylazine and hexazinone in a planted forest steepland Recent Soil, New Zealand Loretta G. Garrett1*, Michael S. Watt2 and Stephen H.

Pearce1 Abstract Background: The use of herbicides for weed control in New Zealand planted forestry is important for primary production. Compared to other soil types in New Zealand, the movement of terbuthylazine and hexazinone in a planted forest Pumice soil from this study also showed low mobility of terbuthylazine and more rapid soil profile movement of hexazinone (Close et.

Hexazinone (active ingredient) was aerially applied as a pellet (Velpar ULW) and as a liquid (Velpar L) to watersheds in the Piedmont of Alabama, U.S.A., at the rate of kgha-1 (three times. movement of hexazinone from forested watersheds in the southern United States. When applied according to labe1 di-rections, the maximum concentration observed in storm run-off was short lived and generally below p,g.L-l.

In Australia, hexazinone contamination (up to 4 pg.L-‘) of a stream draining a catchment treated with 2 kga.i:hã’ was. Because of its widespread global use, there is a substantial body of published literature, mostly from the USA and Canada, documenting the movement of hexazinone through forest watersheds and its impacts on terrestrial and aquatic flora and fauna (Mayack et al.

; Leitch and Flinn ; Neary ; Thompson et al. ; Bouchard et al. ; Lavy et al. ; Michael et al. ENVIRONMENTAL FATE Half of the applied herbicide is lost in soil after one to six months depending on the climate and soil type. Hexazinone is broken down by soil microbes.

They break apart the ring structure of the compound and release carbon dioxide in the process. Asheville, NC; U.S.

Department of Agriculture, Forest Service, Southeastern Forest Experiment Station; Vol. Related Search. Aquatic fate of aerially applied hexazinone and terbuthylazine in a New Zealand planted forest; Herbicide Dissipation Studies in Southern Forest Ecosystems; Pesticides Used in Forestry and Their Impacts on.

The objective of this study was to assess the environmental fate of terbuthylazine and hexazinone in a Recent Soil following an aerial post-plant herbicide application in a New Zealand planted forest.

The fate of terbuthylazine and hexazinone in a Pumice soil has been evaluated (5,6,7). Pumice soil makes up about a quarter of New Zealand’s planted forest soils and is considered vulnerable to herbicide movement due to its low carbon content.

Book. Full-text available Aquatic Fate of Aerially Applied Hexazinone and Terbuthyla - zine in a New Zealand Planted Forest Forest, woodland, and grassland watersheds throughout the world.

The Canadian Forest Service promotes the sustainable development of Canada's forests and the competitiveness of the Canadian forest sector. The use of forest herbicides are often perceived by the public to cause serious harm to the environment. As a result, many public land managers consider herbicides as socially unacceptable and are hesitant to use these tools to protect forest health and to insure forest sustainability.

This project examines the risks & benefits of forest herbicide practices, as compared to other forest. EFGWB is requesting validation of the analytical method for hexazinone in soil. The following study was submitted to support registration of hexazinone for use on fruit trees, pine forest, fir forest, grasses (e.g.

pastures), spruces, trans- portation rights-of-way, and ufility rights-of-way (some indoor uses, as well). Ronald Ney.

Environmental Fate Branch. PP8F Added Use on Sugarcane. J Review. 4 Page(s). Herbert Manning. Environmental Fate Branch. Resubmission of Data. Novem Memorandum. 10 Page(s). John Doherty. Toxicology Branch. Request for permanent Tolerance for Hexazinone and its. Hexazinone is an example of an atypical triazine herbicide used for control of woody plants in reforestation areas and for selective weed control in sugarcane, pineapple, and alfalfa.

The degradation of hexazinone in the rat, alfalfa, and sugarcane was originally reported by Holt ().The mass spectral identification of hexazinone metabolites isolated from rat urine and from sugarcane. In a study of the subsurface movement of hexazinone in forest watersheds in the upper Piedmont of Georgia which had been treated with kg/ha of hexazinone pellets, a series of 19 storms sampled in the last 8 months of produced a residue loss in runoff amounting to % of the applied hexazinone (o of the chemical which fell.The fact that betrixaban has the potential of being used in wide-scale applications in the treatment, leading to the environmental presence, generates a need to understand its fate in the environment.

Hexazinone, a broad-spectrum triazine herbicide, is the most common herbicide to control forest weeds, especially in New Zealand. Therefore, it.Fate and Transport in the Southern Sierra Nevada, California hexazinone.

This herbicide is the most water-soluble and water-mobile of those watershed about 5 km north of the town of Oakhurst.