No single cause for mass die off of honey bees: OIE
Thursday 29 April 2010
The huge die off of bees worldwide, a major threat to crops depending on the honey-making insects for pollination, is not due to any one single factor, the World Organisation for Animal Health (OIE) said Wednesday.
Parasites, viral and bacterial infections, pesticides, and poor nutrition resulting from the impact of human activities on the environment have all played a role in the decline, the OIE said.
At normal times, bee communities naturally lose around five percent of their numbers.
But with the syndrome known as colony collapse disorder (CDD), a third, half - sometimes even 90 percent - of the insects can be wiped out.
In the United States, government figures released last month showed a 29 percent drop in beehives in 2009, coming on the heels of declines of 36 and 32 percent in 2008 and 2007.
The mysterious decimation of bee populations in the United States, Europe, Japan and elsewhere in recent years threatens agricultural production worth tens of billions.
"Honey and royal jelly are examples of precious food that we owe to bees but foremost we owe them abundant harvesting of fruits and vegetables since they contribute to pollinate the flowers which will produce the harvest," said Bernard Vallat, the OIE's Director General.
"Bees contribute to global food security, and their extinction would represent a terrible biological disaster," he said in a statement.
By some estimates, around a third of the food on our plates gets there thanks to Apis mellifera.
The global review conducted by OIE experts concluded that "irresponsible use" of pesticides may damage bee health by increasing their susceptibility to different diseases.
Inadequate "biosecurity" - especially protecting against invasive species - and climate change also likely play a role, the experts said.
"Resources to establish increased surveillance and registration processes, inspection, diagnoses and research capacity are missing in many countries and regions of the world," Wolfgang Ritter, chair the expert panel said.
Earlier research has shown that different bee parasites are active in different parts of the world.
Culprits already identified include a blood-sucking mite called Varroa and a single-celled fungal parasite called Nosema cerenae that causes bee dystentery.
In Europe, a recent intruder - the Asian hornet, Vespa velutina - lurks near hives and captures honey bees in mid-flight, devouring them.
Another suspect is poor nutrition. Mega-farms stripped of hedgerows and wild flowers, along with spreading suburbs, are thought to be depriving bees of a decent diet.
More recently a new pathogen, Varroa jacobsoni, has attacked Apis mellifera in Oceania, and now presents a new threat to beekeeping globally.
Vallat called for more research and adherence to OIE guidelines on biosecurity in trade of bees between countries, a major cause of global contamination.
- 1 Scottish referendum: So how about the English now being given a chance to split from England?
- 2 Friends 20th anniversary: Alison Jackson photographs reunited cast
- 3 London council removes 'unacceptable' Stamford Hill posters telling women which side of the road to walk down
- 4 The response to my Pizza Express review has been overwhelming, and taught me a lot about journalism
- 5 Free U2 album: How the most generous giveaway in music history turned into a PR disaster
Scottish independence referendum: A nation divided against itself
Scottish referendum results: Cross-party consensus collapses amid Tory-Labour spat on the 'English question'
Scottish independence: David Cameron is becoming the 'George Bush of Britain'
Russia freezes Ukraine into submission: Kiev admits country doesn't have enough fuel for winter
Archbishop of Canterbury admits doubts about existence of God
Portuguese academic says British are 'filthy, violent and drunk'
Unpaid Voluntary Position : Reach Volunteering: Volunteer your expertise as Tr...
£68 - £73 per day + Competitive rates of pay based on experience: Randstad Edu...
£69 - £73 per day + Competitive London rates of pay: Randstad Education Group:...
£117 - £157 per day + Competitive London rates: Randstad Education Group: * Pr...