Pesticide levels previously thought to be safe for pollinators may prove harmful to wild bee health, according to research published in Pest Management Science this month.
The Canadian study shows that adult bumble bees exposed to the pesticide spinosad during larval development – at levels they could encounter in the environment – have impaired foraging ability. Bees are important pollinators of crops. In developed countries, approximately a third of human food is reliant on pollinating activity. Wild bees are thought to contribute significantly to this quantity. But although many pesticides are known to be toxic to bees, toxicity testing is largely restricted to direct lethal effects on adult honey bees, if tested on bees at all.
The researchers say sub-lethal effects on honey bees could be going unnoticed, and that different bee species could be also be affected. Dr Lora Morandin and colleagues at Canada’s Simon Fraser University tested the effects of different levels of spinosad on bumble bee colony health and foraging ability. Spinosad is a natural pesticide derived from the bacteria Actinomycetes. It is used in over 30 countries including North America, Canada and the UK to combat common crop pests such as caterpillars and thrips.
Jacqueline Ali | alfa
Raiding the rape field
23.05.2018 | Julius-Maximilians-Universität Würzburg
New technique reveals details of forest fire recovery
17.05.2018 | DOE/Brookhaven National Laboratory
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
02.05.2018 | Event News
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12.04.2018 | Event News
24.05.2018 | Physics and Astronomy
24.05.2018 | Health and Medicine
24.05.2018 | Life Sciences