178 research outputs found
Herbicide evaluation for the control of wild taro
Wild taro (Colocasia esculenta (L.) Schott), is an exotic, emergent
perennial that has established in many shallow-water
wetlands throughout the southern United States. Although
wild taro is a cultivated crop in many tropical and subtropical
areas of the world, its invasion in riverine and lacustrine wetlands
in the U.S. has resulted in the loss of habitat for native
plant species. Once established, wild taro forms dense, monotypic
stands that reduce the diversity of native vegetation, as
has occurred in Louisiana, Florida, and Texas (Akridge and
Fonteyn 1981, Simberloff et al. 1997). Akridge and Fonteyn
(1981) reported that although wild taro is considered naturalized
in south-central Texas, its present dominance along
the San Marcos River has altered the native vegetational
structure and dynamics of this river system. The
objective of this study was to evaluate the efficacy of four
aquatic herbicides for control of wild taro
Comparative Response of Two Hydrilla Strains to Fluridone
Experiments were conducted in a controlled-environmental
growth chamber to evaluate the response of two strains of
the invasive submersed plant
Hydrilla verticillata
(L.f.) Royle to fluridone (1-methyl-3-phenyl-5-[3-trifluoromethyl)phenyl]-
4(1H)-pyridinone). (PDF has 6 pages.
Effects of Triclopyr on Variable-Leaf Watermilfoil
The objective of the study described here was to determine
the effect on variable-leaf watermilfoil of various combinations
of triclopyr concentrations and exposure times
using dosage rates that controlled Eurasian watermilfoil under
laboratory and field conditions (Netherland and
Getsinger 1992, Getsinger et al. 1997, Petty et al. 1998)
A Review of the Aquatic Environmental Fate of Triclopyr and its Major Metabolites
The purpose of this paper is to provide an overview of the
aquatic environmental fate of triclopyr and its major metabolites,
TCP and TMP. This review is primarily based on results
of laboratory and field studies conducted by various Federal
Agencies and the registrant to support the US aquatic registration
for triclopyr TEA
Inclusive Public Housing: Services for the Hard to House
Evaluates the Chicago Family Case Management Demonstration, a model for comprehensive services targeting families with multiple complex problems that are ineligible for mixed-income housing or unable to negotiate the private market. Outlines implications
Mortgage Interest Deduction
Reviews the mortgage interest deduction's fiscal costs, its limitations in subsidizing homeownership, and alternatives. Analyzes the estimated effects of eliminating it, replacing it with alternative tax credits, and limiting the deduction to 28 percent
The Housing Affordability Gap for Extremely Low-Income Renters in 2013
This brief provides information on national trends in housing affordability for ELI renter households, as well as insights into which major counties are making the most and least progress on closing the housing affordability gap. The findings are based on data from the 2000 Census as well as three-year averages from the 2005, 2006, and 2007 and the 2011, 2012, and 2013 1-year American Community Surveys. For the sake of simplicity we refer to data averaged from 2011 -- 13 estimates as 2013.This brief is the first publication on housing affordability to combine detailed county-level data on ELI renter households (those with incomes at or below 30 percent of the area median) and the impact of US Department of Housing and Urban Development (HUD) rental assistance
Endothall species selectivity evaluation: northern latitude aquatic plant community
Species selectivity of the aquatic herbicide dipotassium salt of endothall (Aquathol® K) was evaluated on plant species typically found in northern latitude aquatic plant communities. Submersed species included Eurasian watermilfoil (Myriophyllum spicatum L.), curlyleaf pondweed (Potamogeton crispus L.), Illinois pondweed (Potamogeton illinoensis Morong.), sago pondweed (Potamogeton pectinatus
L.), coontail (Ceratophyllum demersum L.), elodea (Elodea canadensis Michx.) and wildcelery (Vallisneria americana
L.). Emergent and floating-leaf plant species evaluated were cattail (Typha latifolia L.), smartweed (Polygonum hydropiperoides Michx.), pickerelweed (Pontederia cordata L.) and spatterdock (Nuphar advena Aiton). The submersed
species evaluations were conducted in 7000 L mesocosm
tanks, and treatment rates included 0, 0.5 1.0, 2.0, and
4.0 mg/L active ingredient (ai) endothall (dipotassium salt of endothall). The exposure period consisted of a 24-h flow
through half-life for 7 d. The cattail and smartweed evaluation was conducted in 860 L mesocosm tanks, and the spatterdock and pickerelweed evaluations were conducted in 1600 L mesocosm tanks. Treatment rates for the emergent and floating-leafed plant evaluations included 0, 0.5, 2.0 and 4.0 mg/L ai endothall, and the exposure period consisted of removing and replacing half the water from each tank, after each 24 h period for a duration of 120 h. Biomass samples were collected at 3 and 8 weeks after treatment (WAT). Endothall effectively controlled Eurasian watermilfoil and curlyleaf pondweed at all of the application rates, and no significant regrowth was observed at 8 WAT. Sago pondweed, wildcelery, and Illinois pondweed biomass were also significantly reduced following the endothall application, but regrowth was observed at 8 WAT. Coontail and elodea showed no effects from endothall application at the 0.5, 1.0, and 2.0 mg/L application rates, but coontail was controlled at 4.0 mg/L rate. Spatterdock, pickerelweed, cattail, and smartweed were not injured at any of the endothall application rates
The Chicago Family Case Management Demonstration: Developing a New Model for Serving "Hard to House" Public Housing Families
Describes the design, development, and implementation of an initiative to provide families with enhanced case management, including relocation services, workforce support, and financial literacy training. Presents baseline findings from a resident survey
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