News tagged with invasive weeds
New Delta invader threatens to clog waterways, pumps
WALNUT CREEK, Calif.-An invasive weed just now taking hold in the Delta could clog water delivery pumps and marinas on a scale never seen here before, but state officials say they are nearly hamstrung in trying to deal ...
Dec 22, 2011 |
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War on willows
Willows are major environmental weeds of riverbank habitats across much of south-eastern Australia. They obstruct water flow, increase water temperature, change water chemistry and can displace native riverine ...
Jul 29, 2011 |
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Noxious weed reporting system now available in 11 western states
Spring has finally arrived and many of us are once again heading back into the fields and rangelands, into the rivers, and into the backcountry for work and for play. As our surroundings are greening up, we must remember ...
May 19, 2011 |
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To help rice farmers, geneticists study how nature produces a weed
As rice farmers across the south prepare to plant their crop this month, University of Massachusetts Amherst evolutionary geneticist Ana Caicedo and a research team are beginning a major new study of how weeds ...
Apr 06, 2011 |
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'Wicked Weed of the West' waning with effect of weevils, other nontoxic remedies
(PhysOrg.com) -- It's not often that plants are described as diabolical, but spotted knapweed has that rare distinction. A 2004 issue of Smithsonian magazine, for instance, dubbed it the "wicked weed of the ...
Mar 31, 2011 |
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Weeds and the Murray
(PhysOrg.com) -- A new study has revealed that human-induced changes in the flow of the Murray River has led to mass weed invasion and reduced biodiversity in wetlands along the riverbank, highlighting the need for a review ...
Feb 15, 2011 |
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Overseas lab seeks US weed control 'recruits'
The search is on for insects, mites, microbes or nematodes that could be used in a biologically based approach to controlling silverleaf nightshade, an invasive weed from the Americas that has spread to southern Europe, Africa, ...
Nov 24, 2010 |
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Growing Roundup-resistant weed problem must be dealt with, expert says
(PhysOrg.com) -- When Penn State weed scientist David Mortensen told members of the U.S. House Oversight Committee this summer that the government should restrict the use of herbicide-tolerant crops and impose ...
Sep 14, 2010 |
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Dogs outdo humans at detecting rare noxious weed
(PhysOrg.com) -- A field test in Montana pitted dog against human in an effort to identify and eradicate spotted knapweed. This weed threatens the survival of native species and can bring about both economic and ecosystem ...
Jun 23, 2010 |
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Warming could change South Australia's weed pests
(PhysOrg.com) -- Hotter temperatures and reduced rainfall in South Australia due to climate change could prompt a period of 'weed change' across the state, according to a new report from CSIRO.
May 20, 2010 |
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Eliminating weeds could put more cows on the pasture
A weed calculator developed by an Agricultural Research Service (ARS) scientist tells ranchers the number of additional cows they could raise if they eliminated one or two widespread exotic invasive weeds.
Apr 28, 2010 |
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Microorganism may provide key to combating giant salvinia throughout Louisiana
A team of researchers at Louisiana Tech University has found that a naturally occurring microorganism acts as a natural herbicide against giant salvinia.
Nov 19, 2009 |
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You're being followed: Scientists track movement of living things
Almost 24 centuries after the Greek philosopher Aristotle wrote his book, "On the Movement of Animals," modern scientists are still struggling to understand how, why, when and where living creatures move.
Nov 13, 2009 |
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Spread of Western Juniper Seeds Studied
(PhysOrg.com) -- Aromatic, evergreen foliage and plump, dusty-blue to nearly purple berries make western juniper appealing, whether it's a small shrub or a lofty tree. The trouble is, during the past 100 years ...
Nov 05, 2009 |
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