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TEKTRAN The ARS Manuscripts Database
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109 publication requests found in 4.672 seconds.
- USING AVIRIS IMAGERY TO MAP INVASIVE PLANTS ON RANGELANDS: LEAFY SPURGE IN NORTHEASTERN WYOMING
Leafy spurge is an adventive, perennial weed that infests approximaely 1.2 million hectares of land and causes severe environmental and economic impacts on rangelands. During 1999, AVIRIS imagery was acquired in northeastern Wyoming near Devils Tower National Monument. Mixed tuned matched filterin...
- DISPERSAL OF LEAFY SPURGE (EUPHORBIA ESULA L.) SEEDS IN THE FECES OF WILDLIFE
Leafy spurge (Euphorbia esula) was introduced into North America from Europe many years ago and has become a very problematic invasive plant in many areas of western United States and Canada. A number of mechanisms by which leafy spurge is dispersed to new areas are understood, but there are rough ...
- COMPARATIVE EFFECTS OF LEAFY SPURGE ON RUMEN BACTERIAL ECOLOGY OF THE BOVINE AND OVINE.
Euphorbia esula (Leafy spurge ;LS), is a forb native to Eurasia and is considered an invasive plant species in the Northern Great Plains. Domesticated species of ruminants including goats and sheep graze leafy spurge with minimal adverse effects; however, cattle avoid areas infested with LS. When...
- COMPARISON OF HYPERSPECTRAL AND MULTISPECTRAL REMOTE SENSING WITH GEOSPATIAL POTENTIAL DISTRIBUTION MODELS OF LEAFY SPURGE IN NORTHEASTERN WYOMING
Leafy spurge (Euphorbia esula L.) is a noxious invasive weed that infests over 1.2 million hectares of land in North America. One of the fundamental needs in leafy spurge management is cost-effective, large-scale, and long-term documentation and monitoring of plant populations. Leafy spurge is a g...
- EFFECTS OF LEAFY SPURGE (EUPHORBIA ESULA) ON RUMINANT GAS PRODUCTION AND IN VITRO DIGESTION
Leafy spurge (LS; Euphorbia esula) is indigenous to Eurasia and is rapidly changing the landscape in the northern Great Plains and Intermountain West. Sheep consume LS at a higher rate than cattle. Our objectives were to investigate LS in vitro digestibility and gas production by bovine vs ovine in...
- FIELD AND LABORATORY BIOLOGY OF THE STEM-FEEDING BEETLE THAMNURGUS EUPHORBIAE (KOSTER) (COLEOPTERA: SCOLYTIDAE) IN ITALY, A POTENTIAL BIOLOGICAL CONTROL CANDIDATE OF LEAFY SPURGE IN THE USA AND CANADA
The biology of Thamnurgus euphorbiae (Kuster) Coleoptera: Scolytidae was studied in the field and laboratory at the USDA-ARS-EBCL, Rome Italy. The Species is univoltine and overwinters as adult in the stems of its host plant, Euphorbia characias. Eggs are laid into stems of E. characias during Apr...
- SOILBORNE MICROORGANISMS OF EUPHORBIA ARE POTENTIAL BIOLOGICAL CONTROL AGENTS OF THE INVASIVE WEED LEAFY SPURGE
Leafy spurge (Euphorbia esula/virgata), a native of Eurasia, is a serious invasive weed of grasslands of the northern Great Plains of the U.S. and prairie provinces of Canada. Leafy spurge is very difficult to control with herbicides, insect biological control agents, and other cultural practices. P...
- ALKANES, METHYLALKANES, ALKENES AND ALKADIENES OF ADULT FLEA BEETLES, APHTHONA SPECIES
The adult beetles, Aphthona lacertosa and Aphthona nigriscutis, used as biocontrol agents for leafy spurge, had a complex mixture of hydrocarbons on their cuticular surface consisting of alkanes, methylalkanes, alkenes and alkadienes as determined by gas chromatography-mass spectrometry. A trace ...
- REDUCING LEAFY SPURGE (EUPHORBIA ESULA) WITH A COMBINATION OF SHEEP GRAZING AND IMAZAPIC
Two experiments were conducted from 2001 to 2004 to determine whether early-summer sheep grazing combined with an autumn application of imazapic would enhance control of leafy spurge. For Experiments1 and 2, treatments were arranged in a factorial array and were: 1) neither grazing nor imazapic app...
- RODENT AND RUMINANT INGESTIVE RESPONSES TO FLAVONOIDS IN EUPHORBIA ESULA
Euphorbia esula, common name leafy spurge, was chemically evaluated for aversive phytochemicals that appear to minimize herbivory by rodents and cattle. A portion of the initial aqueous methanol extract called the middle layer elicited food aversions in rats as did the petroleum ether extract of th...
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Last Modified: 02/12/2009
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