The Government is being asked to investigate a possible link between a new generation of pesticides and the decline of honey bees. It is suspected that the chemicals may be impairing the insects’ ability to defend themselves against harmful parasites through grooming.
The Environment Secretary, Caroline Spelman, will have to answer a question in the Commons from the former Home Office minister David Hanson about whether the Government will investigate if the effect of neonicotinoids on the grooming behaviour of bees is similar to its effect on termites.
The pesticides, neonicotinoids, made by the German agribusiness giant Bayer and rapidly spreading in use, are known to be fatal to termites by damaging their ability to groom themselves and thus remove the spores of harmful fungi.
In a leaflet promoting an anti-termite insecticide, Premise 200SC, sold in Asia, the company says it is the direct effect on the insects’ grooming abilities of the neonicotinoid active ingredient, imidacloprid, which eventually kills them. Now bee campaigners in Britain want to know if this mechanism could also be at work on European honey bees and other pollinating insects which are rapidly declining in numbers.
“Grooming protects insects from all kinds of pests and viruses, while helping to maintain general health and functioning,” Ms Williams said yesterday. “A defence for honey bees against the varroa mite [a parasite causing colonies to decline] is to groom the mites away from the body. Do we know for sure that neonicotinoids do not hamper the ability of honey bees to deal with varroa?”
Matt Shardlow, chief executive of Buglife, the invertebrate conservation charity, said: “Scientific studies have shown that neonicotinoids significantly reduce the activity of honey bees, and it is highly likely that this would include a reduction in the amount of grooming that they do.
“Hence there is a clear potential mechanism for these pesticides to damage the first line of defence that insects have against disease. Again it seems clear that insecticides are linked to sickness in bees and impairment to pollination services.”
The possibility fits in with what has already been discovered about the harmful effects of neonicotinoids – in that bees treated with imidacloprid, which is Bayer’s biggest-selling insecticide worth £500m a year in sales to the company – are far more susceptible to disease, even at microscopic doses. This has been shown by two independent studies carried out in the past two years.
And,
Cancer scientists get pushy about prevention
Kristin Schafer
As evidence linking pollutants and cancer becomes increasingly clear, scientists around the world are calling for something to be done — and they’re getting downright pushy about it.
Well maybe not pushy, exactly. But definitely pointed and impatient as they urge policymakers to take steps now to protect us from chemicals that cause cancer.
First there was the President’s Cancer Panel report, released in early May of last year. As I’ve pointed out in earlier posts, the scientists that pulled this report together called on the White House to craft much stronger policies to cut down our exposure to cancer-causing chemicals — and the sooner the better.
Then earlier this month, Dr. David Christiani (a preeminent cancer scientist from Harvard’s School of Public Health) endorsed the Cancer Panel’s findings in the prestigious New England Journal of Medicine. He echoed the authors’ urgent call on the Obama Administration to tackle cancer by tackling the pollutants that cause it.
And just last week, medical experts pulled together by the World Health Organization for a cancer summit in Spain called on the governments of the world to “adopt and enforce national and international legislation for protection against environmental and occupational carcinogens.” In other words, to get serious about preventing cancer by protecting people from things …
