Tag: "pesticides" at biology news
Pesticides in the nation's streams and ground water
...vey released a report describing the occurrence of pesticides
in streams and ground water during 1992-2001. The report concludes that pesticides
are typically present throughout the year in most streams in urban and agricultural areas of the Nat...
Study of Latina women and children finds large variation in susceptibility to pesticides
...susceptible to exposure to certain organophosphate pesticides
than other newborns, and 65 to 130 times more sens...veals far greater variability in susceptibility to pesticides
than previously predicted. Current U.S. Environmental Protection Agency (EPA) standards require an e...
Organic Center symposium examines children's pesticide risks
...o be Discussed The discovery of new, reduced risk pesticides
has clearly helped farmers in their transition away from high-risk pesticides. Steps by EPA to expedite registration of new chemistry should be strengthened. Integrated Pest Management has not markedly reduced risks because it remains too focused on...
Marine mammals are on the frontline of failing ocean health
...y evaluate the effects and trade-offs of important pesticides
and other chemicals before they cause problems in the environment. "As old chemicals are taken out of use, new ones pop up," says Krahn. "Often we don't know if the new substitutes will harm the ecosystem." "It's a struggle to find replacements," sa...
Arctic marine mammals: The new canaries?
...such as mercury, cadmium, and selected chlorinated pesticides
a process called biomagnification - from one part...at the AAAS meeting. Heavy metals and chlorinated pesticides
may alter normal biochemical and physiological functions such as reproduction and development in ani...
Disturbing former farmlands can rouse old pesticides, says Dartmouth research
...obilize both arsenic and lead that were applied as pesticides
in the early 1900s. Once disturbed, these metals c...f Earth Sciences at Dartmouth. "Unlike some of the pesticides
used today, metals like arsenic and lead in old pesticides
do not degrade over time. So the question...
Pesticide combinations imperil frogs, probably contribute to amphibian decline
... cause the impaired immune response. "It's not the pesticides
alone or introduced predators or ultraviolet light...stern cornfields - a subset of more than two dozen pesticides
approved for use. All nine were found in the scientists' study area in Nebraska in pools of water be...
Rutgers researchers create tiny chemical cages to enclose drug, pesticide molecules
...ters (billionths of a meter) wide, also could make pesticides
less hazardous to handle, filter toxic substances out of wastewater and regulate the pace of reactions in chemical production. "While the concept of chemical cages is not new, we've created new components and advanced the assembly process to increase...
Report highlights DOE Joint Genome Institute achievements
...n earth, and can remediate explosive contaminants, pesticides
and toxic waste. "By marshalling the resources of now five national laboratories, DOE JGI has driven down the cost of sequencing while generating world-class science for developing effective strategies for clean energy, environmental remediation, ...
Post-Katrina: Lead in disturbed soil may pose heightened health risk
...amples include high levels of iron, several banned pesticides
and pathogenic bacteria, but the researchers say that concentrations of most of these contaminants were unlikely to pose an immediate human health threat. The peer-reviewed study, which represents one of the most detailed environmental sampling effor...
Finally, male water fleas exposed
...n freshwater food webs. It also demonstrates that pesticides
that mimic the hormone used in the UB experiments may have much broader effects than initially believed, and could damage populations of fish and other organisms higher up in the food chain. "Most freshwater fish eat water fleas at some point in thei...
Genetic defenders protect crops from fungal disease
...tate crops and cost growers billions of dollars in pesticides
every year. The study, published in the November 18 issue of the journal Science, describes powdery mildew infection in the mustard relative Arabidopsis thaliana. Each species of mildew is host-specific, meaning it can infect some plant species, but ...
Insect pheromone research wins Eppendorf/Science prize
...e methods of pest control. The toxicity of today's pesticides
and the emergence of pesticide resistance limit their use, Xu writes. Pingxi Xu was born and grew up in the northern province of Jiangsu, China. His first career was as a pediatrician, but after years of pediatric practice, Dr. Xu became interested i...
Biotech cotton 8: Bugs 0
...ntrol tactics replaced a large amount of the harsh pesticides
used on cotton crops. Spraying less chemical insecticides means more beneficial insects survive, further reducing the need for spraying. By 2004, pink bollworm losses had fallen to nearly half of earlier levels, $4.34 per acre. Tabashnik said, "Some ...
Defeating the 'superpests'
...ientists have developed a new technique that makes pesticides
more effective by removing insects' ability to exh...to be almost 100 per cent effective. Resistance to pesticides
is a global problem, which is hitting tropical and developing countries particularly hard. Insect pe...
New target found to fight, treat Parkinson's
...er incidence in rural areas and is associated with pesticides
and insecticides frequently used in farming practices." The research also opens up novel avenues for the development of PD therapies by targeting microtubules, he said. Feng and colleagues in his laboratory are working actively towards this g...
DDT-resistant insects have additional genetic advantage that helps resistance spread
...very overturns current theories that resistance to pesticides
burdens insects with a genetic disadvantage that would stop them from competing with non-resistant insects once farmers stop using that pesticide. Instead, researchers now believe that fruit flies that develop resistance to DDT gain a two-fold advan...
Ethanol and biodiesel from crops not worth the energy
...sed in producing the crop (including production of pesticides
and fertilizer, running farm machinery and irrigating, grinding and transporting the crop) and in fermenting/distilling the ethanol from the water mix. Although additional costs are incurred, such as federal and state subsidies that are passed on to ...
What do 'ecolabels' tell about food?
...it over environmental and social concerns, such as pesticides
and the well-being of farm workers. But which ecolabels are to be believed? In understanding ecolabels, Lockeretz and Merrigan stress that a credible ecolabel must: Be based on transparent, meaningful, and verifiable standards Be independently cer...
NRL develops self-cleaning 'smart' fabrics
...ultrathin materials coating that actively destroys pesticides
and related chemical agents on contact. The coat...g fabrics for decontamination of organophosphorous pesticides
and related chemical agents," Advanced Materials, vol. 16, pp 2112 (2004), authored by Alok Singh, Y...
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