Navigation Links
Commonly used herbicides seen as threat to endangered butterflies
Date:3/7/2012

PUYALLUP, Wash.A Washington State University toxicologist has found that three commonly used herbicides can dramatically reduce butterfly populations.

The research was aimed at possible effects on the Lange's metalmark, an endangered species in northern California, but it has implications for other at-risk and endangered butterflies wherever herbicides are used, says John Stark, an ecotoxicologist and director of the WSU Puyallup Research and Extension Center.

Stark and his colleagues tested triclopyr, sethoxydim and imazapyr on butterfly larvae at the request of the U.S. Fish and Wildlife Service, which uses the herbicides to maintain habitat for the Lange's metalmark in its last habitat, the Antioch Dunes National Wildlife Refuge in northern California. The researchers used the Behr's metalmark as a proxy for the Lange's metalmark, whose endangered status precludes using it for tests.

The researchers found adult numbers of the Behr's metalmark butterfly dropped by one-fourth to more than one-third when their larvae were exposed to regularly applied rates of the herbicides.

In a small population of endangered animals, says Stark, "any kind of reduction like that is going to be a problem."

While the dunes may have harbored 25,000 Lange's metalmarks 50 to 100 years ago, damage to the dunes reduced the population to 5,000 by 1972 and as low as 45 in 2006.

Key to the butterfly's survival is the naked stem buckwheat plant, which is easily overgrown by the non-native plants ripgut brome, vetch and yellow starthistle.

Refuge managers have tried to weed by hand but the process risks disturbing the buckwheat plants and butterfly eggs and larvae. And when the refuge managers started spraying the plants with herbicides, they noticed the butterfly populations were dropping even more, says Stark.

The study, funded by the Fish and Wildlife Service and published in the journal Environmental Pollution, is one of the first to document the eff
'/>"/>

Contact: John Stark
starkj@wsu.edu
253-445-4519
Washington State University
Source:Eurekalert

Page: 1 2

Related biology news :

1. A sleep strategy commonly used by night nurses throws off their circadian clocks
2. The first DNA barcodes of commonly traded bushmeat are published
3. Feasibility of using mycoherbicides to control illicit drug crops is uncertain
4. Which direction are herbicides heading?
5. How grass buffers keep agricultural herbicides at bay
6. Common herbicides and fibrates block nutrient-sensing receptor found in gut and pancreas
7. Understanding how weeds are resistant to herbicides
8. Nowhere to hide: Study finds future of Sumatran tigers threatened by human disturbances
9. World nourishment at risk of being diminished: Wild cereals threatened by global warming
10. Irish mammals under serious threat from invasional meltdown
11. Climate change threatens tropical birds
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/14/2014)... ATHENS, Ohio (Oct. 14, 2014)—It,s been millions of years ... but a team led by Ohio University scientists is ... to model airflow through dinosaur snouts. The research has ... not only breathe but to enhance the sense of ... pretty ,nosy, animals," said Ohio University doctoral student Jason ...
(Date:10/14/2014)... has discovered a new kind of stem cell that can ... liver blood vessels, according to a study published today in ... such a cell type contradicts current theory on how organs ... clues to origins of, and future treatment for, liver cancer., ... into a complex being made up of more than 200 ...
(Date:10/14/2014)... WORCESTER, MA – A team of scientists led ... School (UMMS) and the University of Miami Miller ... likely a key genetic pathway underlying bipolar (manic ... better drugs for treating bipolar affective disorder, as ... , The new findings, published online this week ...
Breaking Biology News(10 mins):Dinosaur breathing study shows that noses enhanced smelling and cooled brain 2Dinosaur breathing study shows that noses enhanced smelling and cooled brain 3Stem cell discovery challenges dogma on how fetus develops; holds insights for liver cancer and reg 2Stem cell discovery challenges dogma on how fetus develops; holds insights for liver cancer and reg 3Rare genetic disease protects against bipolar disorder 2Rare genetic disease protects against bipolar disorder 3
... June 29, 2011 BD Biosciences, a segment ... the availability of BD Recharge™, a chemically defined ... that offers productivity comparable to yeast-based peptones. ... advance for biopharmaceutical cell culture," said Robert Hallenbeck, ...
... A team of North Carolina State University researchers has discovered ... new brain cells in adults does its job. Their findings ... or disease. Most areas of the brain do not ... One exception is the olfactory bulb, the brain,s scent processor, ...
... Jerusalem, Israel The Israeli Chairmanship of EUREKA, the largest ... today in Jerusalem that since the start of Israel,s ... projects have been approved and supported by the program, ... Jerusalem for the fourth and final event held in ...
Cached Biology News:BD Biosciences Introduces Chemically Defined Cell Culture Media Supplement that Increases Biopharmaceutical Protein Production 2Genetic 'conductor' involved with new brain cell production in adults 2EUREKA invested over 300 million euros in industrial initiatives over the past year 2EUREKA invested over 300 million euros in industrial initiatives over the past year 3EUREKA invested over 300 million euros in industrial initiatives over the past year 4
(Date:10/20/2014)... October 20, 2014 Earle ... LLC, announced today that Ellen Teplitzky, an experienced ... for the pharmaceutical industry, has joined the firm ... its legal services practice. NDA Partners provides ... witness and testimony, to top law firms and ...
(Date:10/19/2014)... 2014 OCTOBER 20-22, 2014: ... ABIM will take place at the ... ABIM 2014 is now available at ... companies and organizations from all over the ... on the latest products and developments on ...
(Date:10/19/2014)... October 19, 2014 The Asian Automatic ... Asian with analysis and forecast of revenue. The Automatic ... to around $463.9 million by 2018, at a developing ... through the TOC of the Asian Automatic patient billing ... provided. This also provides a glimpse of the segmentation ...
(Date:10/19/2014)... Orthopedic braces and support systems report defines and segments the ... The Orthopedic braces and support systems market in Asia is ... a developing CAGR of 4.4% from 2013 to 2018. , ... support systems market, to get an idea of the in-depth ... of orthopedic braces and support systems market in the same ...
Breaking Biology Technology:NDA Partners Appoints Ellen Teplitzky, JD as Director of its Legal Services Practice 2The Asian Automatic patient billing market is estimated to grow to around $463.9 million by 2018 - New Report by MicroMarket Monitor 2The Asian Automatic patient billing market is estimated to grow to around $463.9 million by 2018 - New Report by MicroMarket Monitor 3The Asian Orthopedic braces and support systems market is estimated to grow to around $416.5 million by 2018 - New Report by MicroMarket Monitor 2The Asian Orthopedic braces and support systems market is estimated to grow to around $416.5 million by 2018 - New Report by MicroMarket Monitor 3The Asian Orthopedic braces and support systems market is estimated to grow to around $416.5 million by 2018 - New Report by MicroMarket Monitor 4
... ... to First Registrants , ... Westborough, MA (PRWEB) -- GenomeQuest, the world leader in sequence data management (SDM), ... a web cloud service to researchers around the world. , , , , ,The ...
... 10 Today, US Oncology, Inc . ... president and general counsel, will be departing from the Company, ... , Watts has had a long and rich history with ... providing legal services and consultation as an outside attorney before ...
... Nov. 10 DATATRAK International, Inc. (OTCQX: DATA), a ... for the clinical trials industry, today announced the award ... client, Symbio, LLC. A CRO specializing in dermatology, ... double data entry and EDC. In an effort ...
Cached Biology Technology:GenomeQuest Places ChIP-Seq Workflow Solution On SDM “Cloud” 2GenomeQuest Places ChIP-Seq Workflow Solution On SDM “Cloud” 3GenomeQuest Places ChIP-Seq Workflow Solution On SDM “Cloud” 4US Oncology Announces Retirement of General Counsel Phil Watts 2DATATRAK Signs New Client for Rescue Study 2DATATRAK Signs New Client for Rescue Study 3DATATRAK Signs New Client for Rescue Study 4