Tag: "insecticide" at biology news
Corn Rootworm Changing Behavior, Posing New Threat To Crops
... 1998, they are probably justified in using a soil insecticide
in theirfirst-year corn." U. of I. entomologists in the department of crop sciences have developeda preliminary economic threshold for rootworms in soybeans to help growersdecide if they should use a soil insecticide....
USGS Says Central Columbia Plateau Water Quality Impaired by Agriculture, But Some Good News
...akdown products. A breakdown product of the banned insecticide
DDT was found in both streambed sediment and bottom fish at concentrations exceeding guidelines for the protection of aquatic life. "Another problem for fish habitat is excessive plant growth caused by high levels of nutrients in streams," saidMunn,...
Water Quality In Georgia-Florida Coastal Plain Affected By Agricultural And Urban Activities
...icultural and urban areas. Concentrations of the insecticide
diazinon exceeded guidelines for protection of aquatic life in streams in about 20 percent of samples from an urban stream. Insecticides were not detected in ground water, and they (particularly diazinon) were more common in streams draining urban ar...
Research Into Cockroach Behavior Could Lead To Better Baits
...the amount of space you spray and on the amount of insecticide
used in the home." And maybe, in a few years, the cockroach road map in your kitchen will lead to a dead end....
Peas With Built-In Weevil Resistance
...are 99.5 per cent resistant to weevil attack - no insecticide
required," says Dr TJ Higgins, CSIRO Plant Industry. "We introduced into the peas a gene found in the common kidney bean which has a natural resistance to these seed-eating weevils. "This gene produces a protein that blocks the normal digesti...
UF Researcher's Innovative Fence Helps Control Sand Flies
...nd flies. "What we have essentially done is remove insecticide
from the marsh. Webring the sand flies to the trap and catch them," Day said. "So we're notkilling butterflies, fireflies, parasitic wasps or beetles or anythingother than sand flies." UF and Air Liquide, an international company that produces carbon...
New Microbial Insecticide As Potent As Bt
... as the biggestexperiment in natural selection for insecticide
resistance since theintroduction of chemical pesticides 50 years ago. "What we have with Photorhabdus and other bacteria is a natural source, almostan infinite variety" of toxic molecules, says ffrench-Constant. "We can't affordto hook ourselves to a...
Ecological Consequences Of Jasmonate-Induced Responses For Plants In Native Populations
...cted from herbivores with fencing and pyrethrin insecticide
applications. The amount of jasmonate required to add to the roots of plants in order to elicit an induced nicotine response was determined and one member of each pair was treated during early rosette-stage growth (May-June). The effects ...
Biotech Creates New Solutions And New Problems
... successful thanothers. For instance, miticide and insecticide
treatments led to resurgences ofmite populations to damaging levels. Releases of predaceous mites providedinconsistent control of leaf-chewing mites. However, releases of Willamettemites at low densities early in the growing season consistently reduc...
Offshore DDT Deposit Spreading, Research Suggests
...ents has declined steadily since production of the insecticide
was banned, and marine scientists have believed the decline was primarily due to the substance's chemical decay over time. To the contrary, the Sea Grant study indicates the decline may be largely attributable to processes that continue to pull the s...
Pollutants Found In House Dust Increase Pesticide's Toxicity
...n humans.Building on substantial evidence that the insecticide
chlorpyrifos inhibitscholinesterase, a biochemical critical for nerve cell transmission, researchersat the Johns Hopkins School of Public Health found that pollutants in house dustincrease this adverse effect in studies with purified enzyme. The four...
Fine Toothed Combs, Not Chemicals, Should Be Used To Treat Head Lice
...Head lice can be controlled without application of insecticide
lotions) Regular"wetcombing" through children's ...nvironmentally friendly than repeat prescribing of insecticide
lotion for the treatment of head lice, writes Dr Gill Lewendon in this week's BMJ. The Senior Clini...
Home owners may sleep better because student overcame her fear of insects
...how they distribute food to the colony, and how an insecticide
could beincorporated. "To determine their preferences, we looked at all types of sugars,the impact of salts, and various fatty acids, to characterize the things thatstimulate them to feed," says Fell. "Then, to determine how big a particle an...
Farming's genetic revolution has yet to materialise
.... Some ofthe genetically modified crops produce an insecticide
called Bt. Others aremodified to tolerate high doses of the herbicide glyphosate. To study the use of pesticides on these crops, the USDA divided thecountry into various different regions. In seven of the 12 combinations of cropsand regions, ...
Flea collars may expose children to insecticides
...pollutants. "When some collars are very fresh, the insecticide
residues that can betransferred are pretty high, t... Preliminary analysis shows that the levels of the insecticide
residues thatcollect on the fur of dogs vary with the flea collar's design. With one type ofcollar,...
Mosquito fish may be wiping out amphibians
...t alternative methods of mosquitocontrols, such as insecticide
spraying, may be just as environmentally damaging."We have to be careful about downgrading what is a pretty useful control," hesays....
Worms will never taste the same: a new study examines how insecticides influence
...ich have beeninjected with sub-lethal doses of the insecticide
parathion, after only a singleexposure. Parathion...nophosphate, one of the most widely used classesof insecticide
in both industrialized and developing nations. This avoidance of toxic prey, known as conditioned t...
Reports from special environmental health issue explore links to autoimmune diseases - diabetes, lupus, multiple scleroris and arthritis
...gadult life. For example, prenatal exposure to the insecticide
chlordane, or thearomatic hydrocarbon benzopyrene, produces what appears to be lifelongimmunosuppression in mice. Furthermore, when mice genetically predisposed todevelop autoimmune disease were treated with the environmental contaminanttetrachlorodi...
New study claims data on pollutants worldwide are unreliable, and that some may be less--or more--harmful than thought
...dmethyl dichlorprop, and with ruelene, which is an insecticide
banned in the U.S.but still sold in other countries. In tests designed to study the effects of long-term increases in soiltemperature, the addition of fertilizers and of tropical deforestation, theresearchers found that different soils and t...
Soybean pest native to China detected in U.S. for first time
...cides registered for it, Wedberg says. In fact, no insecticide
is labeled for control of aphids in soybeans. Howe...d detailed management recommendations for possible insecticide
treatments at the Wisconsin Crop Manager web site, which is sponsored by the University of Wisconsin...
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