Some of the world’s most commonly used pesticides are killing bees by damaging their ability to navigate and reducing numbers of queens, research suggests.
Scientific groups in the UK and France studied the effects of neonicotinoids, which are used in more than 100 nations on farm crops and in gardens.
The UK team found the pesticides caused an 85% drop in queen production.
Writing in the journal Science, the groups note that bee declines in many countries are reducing crop yields.
In the UK alone, pollination is calculated to be worth about £430m to the national economy. And the US is among countries where a succession of local populations has crashed, a syndrome known as Colony Collapse Disorder.
Many causes have been suggested, including diseases, parasites, reduction in the range of flowers growing wild in the countryside, pesticides, or a combination of them all. The neonicotinoids investigated in the two Science papers are used on crops such as cereals, oilseed rape and sunflowers.
Often the chemical is applied to seeds before planting. As the plant grows, the pesticide is contained in every part of it, deterring insect pests such as aphids. But it also enters the pollen and nectar, which is how it can affect bees.
Dave Goulson from the UK’s University of Stirling and colleagues studied the impact of the neonicotinoid imidacloprid on bumblebees. They let bees from some colonies feed on pollen and sugar water containing levels of imidacloprid typically found in the wild, while others received a natural diet. Then they placed the colonies out in the field.
Read full article, which was written by Richard Black Environment correspondent, BBC News
Share on social media:
You may also like:
Top-Viewed Posts Last 30 Days
- POLL: Should the Tories be allowed to bring back fox hunting? [2436 Views]
- Trophy Hunter Gets Eaten by Crocodiles [1894 Views]
- Scientists Discover Rare and Endangered Cat in Borneo [974 Views]
- POLL: Should the inter-breeding of lions and tigers be banned? [884 Views]
- POLL: Should wild elephants be sold to Chinese zoos? [839 Views]
- POLL: Should Japan be sanctioned for exceeding its bluefin tuna quota? [838 Views]
- POLL: Should the illegal wildlife trade in slow lorises be stopped? [838 Views]
- Rare footage helps explain what Narwhals use their tusks for [793 Views]
- 10 of the Most Endangered Species on Earth [731 Views]
- POLL: Should the giraffe be listed as an endangered species? [727 Views]
Top-Viewed Posts Last 12 Months
- White Killer Whale Adult Spotted for First Time in Wild [42085 Views]
- POLL: Should there be a worldwide ban on fur farms? [16868 Views]
- Gray Squirrels versus Red Squirrels – The Facts [12273 Views]
- POLL: Should fur farming be banned in the European Union? [12117 Views]
- POLL: Should Congress disband Wildlife “Killing” Services? [11135 Views]
- POLL: Should driven grouse-shooting be banned? [8655 Views]
- POLL: Should grouse shooting on highland estates be banned? [8291 Views]
- POLL: Should black bears be killed for Royal Guards’ fur caps? [8074 Views]
- POLL: Should China’s dog meat festival be banned? [7437 Views]
- POLL: Should trophy and big game hunting be banned? [5383 Views]