Navigation Links
Biocontrol insect exacerbates invasive weed
Date:9/3/2008

Biocontrol agents, such as insects, are often released outside of their native ranges to control invasive plants. But scientists in Montana have found that through complex community interactions among deer mice, native plants and seeds, the presence of an introduced fly may exacerbate the effects of the invasive plant it was meant to control. The authors report their results in the September issue of the journal Ecological Applications.

Spotted knapweed, a flowering plant native to Eurasia, was first discovered in the United States in the late 1800s. This broad-leaved plant has an advantage over native plants because its natural enemies, including insects such as European gallflies, do not naturally exist in North America. Thought to have hitched a ride with hauls of alfalfa, knapweed is now widespread in western North America and has become a serious problem in the U.S. across Washington, Idaho, Wyoming and Montana and in Canada across Alberta and British Columbia.

As early as 1971, U.S. scientists began releasing gallflies in an effort to reduce populations of the invasive weed. Like all biocontrol agents, the gallflies were selected because of their specificity to their host plant, leaving little risk of direct harm to other plants.

Adult flies lay their eggs in the weed's flowers, and after the larvae hatch they induce the plant to grow tissue around the insect, encasing it and isolating it from the rest of the plant.

"The woody galls wall off the fly larvae from within flower head," says Dean Pearson, lead author on the study and a research ecologist with the U.S.D.A. Forest Service's Rocky Mountain Research station. "The larvae then overwinter in the seed heads for about nine months. When the plant devotes all that extra energy to producing these galls, it has less energy to produce seeds."

Scientists and managers expected that this seed deficiency would lead to limited knapweed population growth.
'/>"/>

Contact: Christine Buckley
christine@esa.org
202-833-8773
Ecological Society of America
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Tropical insects go the distance to inform rainforest conservation
2. Natural insecticide re-created in the lab
3. Japanese beetle may help fight hemlock-killing insect
4. Handbook of small grain insects available now
5. ESA celebrates 100 years of insect science journals
6. Tiny pest-eating insect fights fruit flies
7. Insect gut detects unhealthy meal
8. Insects giant leap reconstructed by founder of sociobiology
9. Ants and avalanches: Insects on coffee plants follow widespread natural tendency
10. Birds, bats and insects hold secrets for aerospace engineers
11. Insecticide combo delivers knockout punch
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/14/2014)... a technology that could overcome a major cost ... fuel that could replace expensive and environmentally harmful ... novel catalyst that performs almost as well as ... electric currents to split water molecules into hydrogen ... more efficient than less-expensive catalysts investigated to-date. , ...
(Date:7/14/2014)... ability to reliably and safely make in the laboratory all ... one key step closer to reality. , Writing today in ... University of Wisconsin-Madison stem cell researcher Igor Slukvin reports the ... cells and turning them into both red and the array ... research is important because it identifies how nature itself makes ...
(Date:7/13/2014)... study in women suggests that experiencing one or more ... meal can slow the body,s metabolism, potentially contributing to ... previous day,s stressors before giving them a meal consisting ... scientists then measured their metabolic rate how long ... and took measures of blood sugar, triglycerides, insulin ...
Breaking Biology News(10 mins):Rutgers chemists develop technology to produce clean-burning hydrogen fuel 2Wisconsin scientists find genetic recipe to turn stem cells to blood 2Wisconsin scientists find genetic recipe to turn stem cells to blood 3Weighty issue: Stress and high-fat meals combine to slow metabolism in women 2Weighty issue: Stress and high-fat meals combine to slow metabolism in women 3Weighty issue: Stress and high-fat meals combine to slow metabolism in women 4
... thrown cold water on the idea that planting trees ... Professor Brendan Mackey of Griffith University Climate Change Response ... involving researchers from Australia and the U.K. Their findings ... science and climate change mitigation policy", published in the ...
... the globe issued joint statements today to call world ... can play in the pursuit of sustainable development, and ... drug resistance in infectious agents including tuberculosis. The ... next month,s G8 Summit and other international gatherings later ...
... lift protections for the iconic Hawaiian green sea turtle may ... Stanford researcher. Although the number of Hawaiian green sea ... under the U.S. Endangered Species Act, the population may still ... "It,s critical to compare the animal,s population level to ...
Cached Biology News:Forest and soil carbon is important but does not offset fossil fuel emissions 2Science academies issue 'G-Science' statements to call world leaders' attention to global challenges 2Recovery of Hawaiian green sea turtles still short of historic levels, Stanford-led study suggests 2
(Date:7/11/2014)... 11, 2014  Researchers have pioneered a revolutionary ... new technology, called Virtual Finger, allows scientists to ... neurons and synapses using the flat surface of ... 3D imaging studies orders of magnitude more efficient, ... level across many areas of experimental biology. The ...
(Date:7/10/2014)... 10, 2014 Deep Knowledge Ventures ... Forum on ‘Commercialising Longevity Research’ and welcomed a ... the London Bioscience Innovation Center for the event, ... Aging Analytics Ltd. The meeting highlighted the need ... research for age-related disease, as well as the ...
(Date:7/10/2014)... Robert Harman, DVM, Founder and CEO of Vet-Stem, Inc., the ... relaunch of his highly informative blog, now named Stem Cells ... are Stem Cells ?” Dr. Harman’s purpose for blogging ... basics of stem cell therapy so that pet owners can ... when considering regenerative medicine. , A veterinarian by trade, Dr. ...
(Date:7/10/2014)... CROWN POINT, Ind. , July 10, ... recently expanded its use of capnography for ... a growing group of healthcare leaders in ... Capnography measures how effectively patients are breathing ... respiratory depression occurs. By measuring the amount ...
Breaking Biology Technology:Virtual Finger Enables Scientists To Navigate And Analyze 3D Images Of Complex Biological Structures 2Virtual Finger Enables Scientists To Navigate And Analyze 3D Images Of Complex Biological Structures 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 2DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 4DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 5DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 6Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3Franciscan St. Anthony Health-Crown Point Underscores Patient Safety Commitment Through Expanded Use of Capnography 2
... position of 15 years as International Purchasing Manager ... Consumer Cables.com. Today Weitz and the four fellow ... at American Consumer Cables oversee one of the ... that provides over 5,000 discounted connectivity product solutions ...
... EVANSTON, Ill. and Exton, Pa., Oct. 12 ... of virtual reality (VR) based medical,simulation systems ... leader,in clinical skills training and evaluation software ... symposium in,Washington D.C., an OEM partnership that ...
... EMERYVILLE, Calif., Oct. 10 Neurobiological,Technologies, Inc. (NTI(R)) (Nasdaq: ... call on Monday, October 13, to provide an update ... ischemic stroke.,Hosting the call will be Paul E. Freiman, ... medical officer., -- Date: Monday, October 13, ...
Cached Biology Technology: Former Cables to Go/Lastar Inc. Employee's Move to Form American Consumer Cables Pays Off 2Mentice, Inc. and Education Management Solutions, Inc. Form OEM Partnership 2Mentice, Inc. and Education Management Solutions, Inc. Form OEM Partnership 3Neurobiological Technologies Announces Update Call on Viprinex (TM) Phase 3 Trial Program 2
Mouse monoclonal antibody to PARK2 - Parkinson disease (autosomal recessive, juvenile) 2, parkin...
... used to quantitate double-stranded DNA (dsDNA) in solution, ... With this kit, DNA is stained with Hoechst ... VersaFluor or other fluorometer. The kit quantitates dsDNA ... to 5 micrograms per ml and contains Hoechst ...
... enterprise-scale sequence analysis software with the DeCypher Engine ... DeCypher, you can perform searches like these from ... NT database in under 6 days ... Use HMM analysis to compare 100,000 ...
...
Biology Products: