neonicotinoids


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neonicotinoids

a class of insecticides which act selectively on nicotinic acetylcholine receptors of insects, but have low affinity for vertebrates; used as antiparasitic agents.
References in periodicals archive ?
Dr Philip Donkersley, from Lancaster University, said: "All three neonicotinoids evaluated here show high risk for exposing bumblebees through the pollen and nectar that they feed on.
The European Union has since 2014 had a moratorium on use of neonicotinoids -- made and sold by various companies including Bayer and Syngenta -- after lab research pointed to potential risks for bees, which are crucial for pollinating crops.
Even more alarming, samples from tap water at the University of Iowa, whose campus borders the Iowa River, revealed traces of three different neonicotinoids, proving that the school's filtration sys tem wasn't effectively removing them from water.
The European Commission has since proposed restricting the three neonicotinoids to only allow use on plants in greenhouses, which would extend the ban to crops such as sugar beet and winter cereals with seed treated with the chemicals.
The store only sells neonic-free plants, and all pesticides that contain neonicotinoids are labeled as "harmful to pollinators.
Scientists who tested 198 honey samples from every continent, except Antarctica, discovered that 75 per cent were laced with at least one of the neonicotinoid chemicals.
Neonicotinoids bind to these receptors, overstimulating them to the point that they cause paralysis and death.
Research based in Ontario and Quebec, where a type of insecticide called neonicotinoids are popular, found that bees were exposed to the chemicals for three to four months, during their peak pollinating season, and that exposure had a negative effect on their lifespans and on their hygiene.
Our hope is that it won't be more neonicotinoids, which may risk a loss of the international markets for Philippine coconut products.
Neonicotinoids (neonics) are a class of chemicals used as insecticides for their neurotoxic action on the nicotinic acetylcholine receptor (nAChRs).
Conservationists have raised concerns that chronic exposure to neonicotinoids is weakening honeybee colonies.
Charged with reviewing 1,100 studies and reports on the topic, the task force released its findings in 2015, determining that neonicotinoids do adversely affect honeybees and, as a result, the surrounding ecosystem.