Scientists discover what’s killing bees

Scientists discover what’s killing the bees and it’s worse than you thought:

Scientists discover what’s killing the bees and it’s worse than you thought

Scientists discover what’s killing the bees and it’s worse than you thought

The mysterious mass die-off of honey bees that pollinate $30 billion worth of crops in the US has so decimated America’s apis mellifera population that one bad winter could leave fields fallow. Now, a new study has pinpointed some of the probable causes of bee deaths and the rather scary results show that averting beemageddon will be much more difficult than previously thought.

Scientists had struggled to find the trigger for so-called Colony Collapse Disorder (CCD) that has wiped out an estimated 10 million beehives, worth $2 billion, over the past six years. Suspects have included pesticides, disease-bearing parasites and poor nutrition. But in a first-of-its-kind study published today in the journal PLOS ONE, scientists at the University of Maryland and the US Department of Agriculture have identified a witch’s brew of pesticides and fungicides contaminating pollen that bees collect to feed their hives. The findings break new ground on why large numbers of bees are dying though they do not identify the specific cause of CCD, where an entire beehive dies at once.

When researchers collected pollen from hives on the east coast pollinating cranberry, watermelon and other crops and fed it to healthy bees, those bees showed a significant decline in their ability to resist infection by a parasite called Nosema ceranae. The parasite has been implicated in Colony Collapse Disorder though scientists took pains to point out that their findings do not directly link the pesticides to CCD. The pollen was contaminated on average with nine different pesticides and fungicides though scientists discovered 21 agricultural chemicals in one sample. Scientists identified eight ag chemicals associated with increased risk of infection by the parasite.

Most disturbing, bees that ate pollen contaminated with fungicides were three times as likely to be infected by the parasite. Widely used, fungicides had been thought to be harmless for bees as they’re designed to kill fungus, not insects, on crops like apples.

“There’s growing evidence that fungicides may be affecting the bees on their own and I think what it highlights is a need to reassess how we label these agricultural chemicals,” Dennis vanEngelsdorp, the study’s lead author, told Quartz.

Labels on pesticides warn farmers not to spray when pollinating bees are in the vicinity but such precautions have not applied to fungicides.

Bee populations are so low in the US that it now takes 60% of the country’s surviving colonies just to pollinate one California crop, almonds. And that’s not just a west coast problem—California supplies 80% of the world’s almonds, a market worth $4 billion.

In recent years, a class of chemicals called neonicotinoids has been linked to bee deaths and in April regulators banned the use of the pesticide for two years in Europe where bee populations have also plummeted. But vanEngelsdorp, an assistant research scientist at the University of Maryland, says the new study shows that the interaction of multiple pesticides is affecting bee health.

“The pesticide issue in itself is much more complex than we have led to be believe,” he says. “It’s a lot more complicated than just one product, which means of course the solution does not lie in just banning one class of product.”

The study found another complication in efforts to save the bees: US honey bees, which are descendants of European bees, do not bring home pollen from native North American crops but collect bee chow from nearby weeds and wildflowers. That pollen, however, was also contaminated with pesticides even though those plants were not the target of spraying.

“It’s not clear whether the pesticides are drifting over to those plants but we need take a new look at agricultural spraying practices,” says vanEngelsdorp.

Self-healing protective coating

Scientists create self-healing protective coating, deliver killing blow to screen protectors:

Scientists create self-healing protective coating, deliver killing blow to screen protectors

Scientists create self-healing protective coating, deliver killing blow to screen protectors


Dutch researchers from the Eindhoven University of Technology have created a non-stick protective plastic coating that heals itself when scratched. As far as I can tell, as long as the new coating isn’t completely penetrated, it should continue to heal itself almost indefinitely. From non-stick frying pans to antibacterial coatings on clothes, and from anticorrosion coatings on cars to the oleophobic coating on the iPhone 4, coatings are a very important part of modern day life. The problem is, coatings also tend to be expensive, and so they’re usually applied very thinly. As a result, as soon as you sustain that first scratch, all bets are off — as your old, scratched, non-stick frying pan can attest. Now, the science behind this self-healing coating is fairly tricky, but here’s the basic gist. The Dutch material scientists came up with a coating formulation that separates itself into three layers: A top layer that repels water, a middle layer of polymer “stalks,” and a lower layer reservoir of the coating’s active ingredient. When the top layer is scratched, the active ingredient automatically climbs the stalks and self-heals, returning the non-stick surface to its former glory.

An oleophobic iPhone screen protectorWhat isn’t clear is whether this same approach can be used for other kinds of coating, but considering most coatings are polymer-based, and that the research paper explicitly sets out to find a way of producing self-healing coatings of different varieties, I would be cautiously optimistic. As far as gadgets are concerned, self-healing coatings could replace screen protectors on smartphones and tablets, and possibly provide better protection against dirt and fingerprint smudges. There is also interest in self-healing circuit boards, but micro metal capsules that break open and fill any cracks are a better solution in this case. Beyond gadgets, this self-healing coating will probably be used be on cars (never wash it again!), airplanes (less dirt, less air resistance), ships (less algae/barnacles, less water resistance), frying pans, and possibly plastic tools and appliances, such as self-healing contact lenses.

Police fatally kills man

Stanislaus deputy Tasers, fatally shoots man:



MODESTO, Calif. — Authorities are investigating the shooting death of a man by a Stanislaus County sheriff’s deputy who was responding to reports of a family dispute.  Sheriff’s officials say the deputy went to the home in the town of Keyes on Monday afternoon.  Sgt. Anthony Bejaran says the deputy first used a Taser on 32-year-old George Ramirez Jr. and called for backup. Moments later, the deputy reported that he fired shots.  Ramirez’s family told KCRA-TV that he was severely depressed and that they urged the deputy not to hurt him. George Ramirez Sr. says the deputy refused to listen and shot his son three times after he staggered back to his feet from the Tasering.  Sheriff’s officials declined comment on the family’s claims pending the investigation.