Navigation Links
Most widely used organic pesticide requires help to kill

insects leads to blood poisoning and death.

"It was one of those assumptions built on assumptions -- a scientific house of cards," explains one of the report's authors, Jo Handelsman, of the long-held view of Bt's mode of killing. "What was proposed as a hypothesis in one paper became cited as proven in another and no one seemed to go back to the original literature until now."

Handelsman is a Howard Hughes Medical Institute Professor in the UW-Madison department of plant pathology.

The new work, conducted in the laboratories of Handelsman and Kenneth F. Raffa, a professor in the UW-Madison department of entomology, demonstrates that Bt requires the presence of other bacteria to exert its lethal influence.

Virtually all animals, including humans, depend on the interplay of numerous species of bacteria that, beginning at birth, routinely colonize the stomach and intestines. The caterpillars of moths and butterflies, for example, have anywhere from seven to twenty species of gut bacteria. Humans have between five hundred and one thousand species of micro flora that take up residence in the intestinal tract.

"In moths and butterflies, the complexity is much lower than in mammals, and even some other insects," Broderick explains.

The Wisconsin study was conducted using antibiotics to clear all of the native bacteria that colonize the gut of gypsy moth caterpillars. Exposed to Bt, the caterpillars whose intestinal tracts had been cleared of their native microbial communities showed none of the agent's toxic effects.

When the insect's microbial gut flora were reestablished, Bt's insecticidal activity was restored.To further test their results, the Wisconsin team used a strain of live E. coli engineered to carry the Bt toxin to infect caterpillars, a lethal treatment whether or not the insect gut contained its normal complement of microbes. However, if the engineered E. coli was killed before administration, it
'"/>

Source:University of Wisconsin-Madison


Page: 1 2 3

Related biology news :

1. Columbia study shows widely used artery clearing device does not help patients during heart attack
2. Scientists discover that widely available drug also helps fight kidney disease
3. Breakthrough: Scientists create worlds tiniest organic particles
4. New organic substrate
5. UCSD discovery may help extend life of natural pesticide
6. Scientists discuss improved biopesticides for locust control in West Africa
7. UN successfully tests green pesticide against locusts
8. Green catalyst destroys pesticides and munitions toxins, finds Carnegie Mellon University
9. Corn grain mould used as pesticide
10. New discovery: If it werent for this enzyme, decomposing pesticide would take millennia
11. Biotech cotton provides same yield with fewer pesticides
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Most widely used organic pesticide requires help kill

(Date:9/17/2014)... affordable health care to reproductive technologies, the justice ... ability of people to identify key issues, articulate ... and find the most defensible ways forward. But ... these societal conversations?, The Hastings Center and the ... have teamed up to publish a series of ...
(Date:9/17/2014)... UT Arlington engineering professor and his doctoral student have ... can accumulate water collected from fog and dew., The ... world or deserts around the globe., Cheng Luo, professor ... Heng, PhD candidate in the same College of Engineering ... 25 edition of ACS, (American Chemical Society) ...
(Date:9/17/2014)... has developed, very cleverly, some lessons on how to ... said Joseph Shaw, director of the Optical Technology Center ... structures at the nanoscale, we,ll discover them." , Some ... August during a conference called "The Nature of Light: ... of the University of Arizona College of Optical Sciences. ...
Breaking Biology News(10 mins):Why bioethics literacy matters 2Why bioethics literacy matters 3Shorebird's beak inspires UT Arlington research on water collection 2Nature's designs inspire research into new light-based technologies 2Nature's designs inspire research into new light-based technologies 3
... may not be the answer to mitigating climate change by ... to an international team of plant biologists. The researchers found ... fungi (AMF) -- a type of fungus that is often ... then leads to higher decomposition rates of organic materials, said ...
... the methane on Earth comes from the ocean,s oxygen-rich waters, ... this potent greenhouse gas. Now researchers report that they have ... the most abundant microbes on the planet. The findings ... who made the discovery did not set out to explain ...
... part of the marine ecosystem, fostering biodiversity and protecting ... with pollution and harmful fishing practices, are one of ... One of the solutions to the crisis ... Tel Aviv University,s Department of Molecular Microbiology and Biotechnology, ...
Cached Biology News:Plants' fungi allies may not help store climate change's extra carbon 2Study identifies prime source of ocean methane 2Study identifies prime source of ocean methane 3Viruses could be the key to healthy corals 2
(Date:9/18/2014)... MA (PRWEB) September 18, 2014 ... Molecule Sequencing (tSMS™) technology, announced today the closing ... of investment, led by Genomic Diagnostic Technologies, will ... and diagnostic applications. , Founded in March 2013 ... and Bioinformatics Analyst at Helicos BioSciences, SeqLL has ...
(Date:9/18/2014)... Now a team led by an engineer at Michigan ... that will let scientists slash the cost of one ... Syringe pumps are used to dispatch precise amounts of ... a reaction. They can also cost hundreds or even ... of Michigan Tech students published the library of free ...
(Date:9/18/2014)... USC have developed a new microscopy technology that ... animals at higher-than-ever resolution. , Dubbed "Complementation Activated ... resolutions that are an order of magnitude finer ... the behavior of biomolecules at the nanometer scale. ... by Nature Communications , the researchers behind ...
(Date:9/18/2014)... for computing may have just taken an encouraging step ... led by chemist Stephen O,Brien have discovered new complex ... Combining both properties is very exciting scientifically for the ... devices that might ultimately be designed, in logic circuits ... material, however, has proved difficult until now. , Using ...
Breaking Biology Technology:SeqLL Closes Series-A Funding Round for Expansion of Single Molecule Sequencing 2Doing science just got cheaper -- and faster 2Scientists pioneer microscopy technique that yields fresh data on muscular dystrophy 2Oxides discovered by CCNY team could advance memory devices 2
... Inc., (TSX: IXS.V; OTC Bulletin Board: IXSBF),( http://www.ixsbio.com ... of monoclonal antibodies based on its Dynamic Cross ... a large scale,primate study of DXL625 (CD20), the ... study in cynomolgus monkeys of DXL625, an antibody,directed ...
... Odyssey Thera, Inc. announced,that it has received a ... progress a discovery stage drug candidate into,pre-clinical development. ... as part of the ongoing collaboration with Pfizer., ... of the collaboration with,Pfizer," said John K. Westwick, ...
... (OTC,Pink Sheets: AIMM) today reported a net loss of $86,000, ... ended June 30, 2008, compared with,a net loss of $62,000, ... months ended June 30, 2007. For the six months ended ... share basic and diluted, compared,with net loss of $54,000, or ...
Cached Biology Technology:InNexus Biotechnology Announces Launch of Large Scale Primate Study of DXL625 2AutoImmune Inc. Reports 2008 Second Quarter Financial Results 2AutoImmune Inc. Reports 2008 Second Quarter Financial Results 3
... a simple high performance method for removing ... without significant dilution of protein solution. ... Detergent-OUT Spin column and collect detergent free ... removing detergent from a maximum of 0.2 ...
... Chemicon Detergent-OUT SDS Kit is a simple ... protein solutions. Removes detergents without significant ... the protein solution on the Detergent-OUT Spin ... Med columns are suitable for removing ...
... from frozen embedded tissue blocks, which are ... ensure the highest quality. Tissues of each ... sectioned at a thickness of 7 microns ... large (3-5 mm in diameter) in comparison ...
... Zyagen tissue microarrays are derived from frozen ... rigorous quality control procedures to ensure the ... manually assembled in one block, sectioned at ... coated slides. Sections are large (3-5mm in ...
Biology Products: