Widespread impacts of neonicotinoids 'impossible to deny'

Neonicotinoid pesticides are causing significant damage to a wide range of beneficial species and are a key factor in the decline of bees, say scientists.

Researchers, who have carried out a four-year review of the literature, say the evidence of damage is now "conclusive".

The scientists say the threat to nature is the same as that once posed by the notorious chemical DDT.

Manufacturers say the pesticides are not harming bees or other species.

Neonicotinoids were introduced in the early 1990s as a replacement for older, more damaging chemicals.

They are a systemic insecticide, meaning that they are absorbed into every cell in a plant, making all parts poisonous to pests.

But some scientists have been concerned about their impact, almost since the moment they were introduced.

Much of the worry has surrounded their effects on bees.

There's been a well documented, global decline in these critical pollinators.

Many researchers believe that exposure to neonicotinoids has been an important destabilising factor for the species.

'Worldwide impacts'

In 2011, environmental campaigners, the IUCN, established an international scientific taskforce on systemic pesticides to look into the impacts of these chemicals.

The members have reviewed over 800 peer reviewed papers that have been published in the past 20 years.

Their assessment of the global impact says the threat posed goes far beyond bees.

In their report, to be published next month, they argue that neonicotinoids and another chemical called fipronil are poisoning the earth, the air and the water.

The pesticides accumulate in the soil and leach into water, and pose a significant problem for earthworms, freshwater snails, butterflies and birds.

The researchers say that the classic measurements used to assess the toxicity of a pesticide are not effective for these systemic varieties and conceal their true impact.

They point to one of the studies in the review carried out in the Netherlands.

It found that higher levels of neonicotinoids in water reduced the levels of aquatic invertebrates, which are the main prey for a whole range of species including wading birds, trout and salmon.

"There is so much evidence, going far beyond bees," Prof Dave Goulson from the University of Sussex told BBC News.

"They accumulate in soils, they are commonly turning up in waterways at levels that exceed the lethal dose for things that live in streams.

"It is impossible to deny that these things are having major environmental impacts."

DDT comparison

The scientists are very worried about the prophylactic use of neonicotinoids, where seeds are coated in the chemicals and the plant grows up with the ability to destroy pests already built in.

"It is a bit like taking antibiotics to avoid getting ill," said Prof Goulson, one of a team of 29 scientists involved in the research.

"The more they are used, the stronger the selective pressure you place on pest insects to become resistant to them. Using them as prophylactics is absolute madness in that sense."

The task force argues that with neonicotinoids and fipronil making up around a third of the world market in insecticides, farmers are over-relying on them in the same way as they once became over reliant on chemicals like DDT.

"We have forgotten those lessons and we're back to where we were in the 1960s," said Prof Goulson.

"We are relying almost exclusively on these insecticides, calendar spraying 20 times or more onto a single field, it's a completely bonkers way."

While neonicotinoids don't accumulate in human or animal tissue in the way that DDT once did, the modern pesticides are more lethal, about 6,000 times as toxic compared to the older spray.

Representatives of manufacturers say that there is nothing new in the task force study.

"There is very little credible evidence that these things are causing untoward damage because we would have seen them over 20 years of use," said Dr Julian Little from Bayer, one of the manufacturers of neonicotinoids.

"If you look at the tree bumblebee, it is eating the same food as the other bees, and is being exposed to the same pesticide load and weather conditions and yet it is flourishing, whereas some other bees are not.

"If it were pesticides causing the mass destruction of our fauna, surely you would see effects on all bees?"

The European Crop Protection Association said the task force was being selective in their evidence, pointing to recent studies carried out by industry showing that the declines in bee populations have been overstated.

"We respect the scientists who have produced this research, but it appears that they are part of a movement that brings together some academics and NGOs whose only objective is to restrict or ban the use of neonicotinoid technology regardless of what the evidence may show," a spokesperson said.

Europe already has a two-year moratorium in place meaning that neonicotinoids can't be used on flowering crops such as oilseed rape.

Last week, President Obama announced the creation of a pollinator health task force to look at the impact of pesticide exposure on bees and other insects.

Prof Goulson says that he isn't in favour of a ban.

"We have been using these things for 20 years and there's not a single study that shows they increase yield," he said.

"I'm not personally in favour of an outright ban but I think we should use them much more judiciously - if they don't benefit yield we should stop using them." More

 

© 2014

Farmers worldwide suffer as extreme weather wreaks food havoc

To address the crisis, farm ministers from around the world are gathering in Berlin Saturday to discuss climate change and food production.

BOSTON — Volatile weather around the world is taking farmers on a wild ride. Too much rain in northern China damaged crops in May, three years after too little rain turned the world’s second-biggest corn producer into a net importer of the grain. Dry weather in the U.S. will cut beef output from the world’s biggest producer to the lowest level since 1994, following 2013’s bumper corn crop, which pushed America’s inventory up 30 percent. British farmers couldn’t plant in muddy fields after the second-wettest year on record in 2012 dented the nation’s wheat production.

“Extreme weather events are a massive risk to agriculture,” said Peter Kendall, president of the British National Farmers Union, who raises 3,953 acres of grain crops in Bedfordshire, England. “Farmers can adapt to gradual temperature increases, but extreme weather events have the potential to completely undermine production. It could be drought, it could be too much rain, it could be extreme heat at the wrong time. It’s the extreme that does the damage.”

Farm ministers from around the world are gathering in Berlin Saturday to discuss climate change and food production at an annual agricultural forum, with a joint statement planned after the meeting.

Fast-changing weather patterns, such as the invasion of Arctic air that pushed the mercury in New York from an unseasonably warm 55 degrees Fahrenheit on Jan. 6 to a record low of 4 the next day, will only become more commonplace, according to the New York-based Insurance Information Institute. While the world produces enough to provide its 7 billion people with roughly 2,700 calories daily, and hunger across the globe is declining, one in eight people still don’t get enough to eat, some of which can be blamed on drought, the United Nations said.

“There’s no question, while there’s variability and volatility from year to year, the number and the cost of catastrophic weather events is on the rise, not just in the U.S., but on a global scale,” said Robert Hartwig, an economist and president of the insurance institute. “It’s all but certain that the size and the magnitude and the frequency of disaster losses in the future is going to be larger than what we see today.”

The number of weather events and earthquakes resulting in insured losses climbed last year to 880, 40 percent higher than the average of the last 30 years, according to Munich Re, the world’s largest reinsurer.

Research points to a culprit: an increase in greenhouse gases, generated by human activity, that are forcing global temperatures upward, said Thomas Peterson, principal scientist at the U.S. National Climatic Data Center in Asheville, N.C. The warmer the air the more water it can hold, he said.

“What we’re finding worldwide is that heavy precipitation is increasing,” Peterson said.

Flood waters in Passau, Germany, in May and June reached the highest level since 1501, Munich Re said. That was the year Michelangelo first put a chisel to the block of marble that would become his sculpture of David. High water did $15.2 billion in damage in parts of Central and Eastern Europe, according to Munich Re.

A July hailstorm in Reutlingen, Germany, led to $3.7 billion in insured losses, according to Munich Re. Hailstones the size of babies’ fists cracked the windshield of Marco Kaschuba’s Peugeot.

“Two minutes before the storm started you could already hear a very loud noise,” said Kaschuba, a 33-year-old photographer. “That was from hailstones hitting the ground in the distance and coming closer.”

In 2012, Britain had its second-highest rainfall going back to 1910, according to Britain’s meteorology office. England and Wales had its third-wettest year since 1766. More

 

Italy Calls for Food Security to Be U.N. Priority

ROME--Italy wants to shepherd efforts to make food security a priority for global policy makers, Prime Minister Enrico Letta said in his debut speech at the United Nations General Assembly Wednesday.

"We should address the root causes of the ills afflicting our world rather than limit ourselves to the side effects," Mr. Letta said. "The time has come to launch a new global consensus on food," he said.

In 2008, Italy, with limited financial firepower due to chronic fiscal problems, tried to make food security a signature theme at the Group of Eight summit in L'Aquila, Italy, prodding the largest economies to pledge as much as $15 billion for the cause. The global financial crisis then commanded vast public resources and attention, even though the serious spike in basic food prices that helped trigger the so-called Arab Spring sparked fear that easy monetary policies in developed economies would trigger runaway inflation in basic staples.

Commodity prices have since stabilized, according to a price-monitoring index set up by the UN's Food and Agricultural Organization in Rome.

Mr. Letta said that the 2015 Expo, or world's fair, in Milan should be a springboard for global initiatives, floating the idea that a multilateral pact might be reached there.

The Milan Expo, whose slogan is "Feeding the Planet, Energy for Life," aims to draw 20 million visitors interested in issues linked to sustainability. The event should be seized upon to create a Milan Protocol, modelled on the Kyoto Protocol of the late 1990s that covers environmental issues, with nutritional education, sustainable farming practices and food waste as its cardinal points, according to the Barilla Center for Food and Nutrition, a think tank backed by Barilla SpA, the pasta maker.

"Italy, with its rich food culture and heritage, is well-placed to show leadership in tackling the world's global food issues," said Danielle Nierenberg, an advisory board member at the Center.

Italy is also home to the U.N.'s main food-related agencies, the World Food Program, the International Fund for Agricultural Development, and the FAO, which after decades of advising farmers on how to boost yields is beginning to try to influence retail supply chains in an effort to reduce what it says is the waste of one-third of global food production. More

 

The Refractometer - An Indispensable Monitoring Tool

The Refractometer - An Indispensable Monitoring Tool. from NTS Health on Vimeo.

 

Climate change may reduce crop production by 50% in some countries, says environmentalist

A former Bolivian Ambassador to United Nations said this in Lagos on Friday.

Climate change could reduce yields from rain-fed agriculture by up to 50 per cent in some countries by 2020.

Pablo Solon, former Bolivian Ambassador to United Nations, stated this, Friday, at the inaugural Health of Mother Earth Foundation (HOMEF)’s Sustainable Academy in Lagos.

“We have to recognize that we are part of nature, that our future is linked with the future of earth,” said Mr. Solon, Executive Director, Focus on the Global South.

Two-thirds of all proven fossil fuel reserves would have to be left “unburned” if global warming will be held for two degrees Celsius, according to the International Energy Agency.

Mr. Solon explained the magnitude of the temperature rise by stating that a one degree rise in the normal body temperature could lead to fever.

The event themed ‘Climate Change and the Looming Food Crisis’ had already concluded two sessions, earlier in the week, in Abuja and Benin City.

Nnimmo Bassey, HOMEF’s Director, said that global warming has become a major concern in Nigeria and the rest of the world, with large numbers of people still ignorant about it.

“No doubt people recognize that weather events such as rainfall and flooding are getting more intense. They can even tell you the rhythms of the weather have become unpredictable,” said Mr. Bassey.

“However, when it comes to saying what is responsible for climate change, the answers taper out. If we do not know the cause and those responsible, it is doubtful that we can solve the problem,” he added.

Mr. Bassey said that effective communication of climate change and the looming food crisis will help “unpack the problem.”

“We hope that concepts like Reducing Emissions from Deforestation and Forest Degradation in developing countries (REDD), Clean Development Mechanism (CDM), and other market-based false solutions would be exposed for what they are,” Mr. Bassey said.

“Projects like Eko Atlantic City must be interrogated as a climate challenge, not a solution, recognizing the fact of sea level rise and the low-lying nature of Nigeria’s vulnerable coastline,” he added.

Mr. Bassey further stated that temperature increases of the magnitude currently experienced was now a possibility because of refusal of polluting nations to commit to measurable and verifiable emissions cut.

“Africa is poised to heat up much more than other regions,” Mr. Bassey continued.

“Continuous temperature rise because of lack of commitment of nations to cut emissions at source will translate to the roasting of Africa, an already very vulnerable continent.

“Food production capacity will also be diminished, exposing the continent to great danger,” he added. More

 

Imported bumblebees pose 'parasite threat' to native bees

Bumblebees imported from Europe carry pathogens that pose a threat to native honeybees and bumblebees in the UK, according to scientists.

Between 40,000 and 50,000 bumblebee colonies are imported into England each year to assist with crop pollination.

For a study in the Journal of Applied Ecology, scientists bought 48 colonies - hives containing up to 100 bees each - from three producers in Europe.

They found 77% had parasites that could infect native bees.

Lead researcher Prof William Hughes, of the University of Sussex, said commercial production and importation of bumblebees had been "going on for decades".

"We couldn't grow tomatoes in this country without these bumblebees," he said.

And with the decline in pollinating insects in recent years, food producers are increasingly reliant upon imported bees.

"Over a million colonies are imported globally - it's a huge trade," said Prof Hughes. "And a surprisingly large number of these are produced in factories, mainly in Eastern Europe.

"We sought to answer the big question of whether colonies that are being produced now have parasites and, if so, whether those parasites are actually infectious or harmful."

With his colleagues from the universities of Leeds and Stirling, the researcher set out to buy colonies "in exactly the same way a farmer would".

The team then screened the bees for parasite DNA.

"We found quite a number of parasites within the bees," Prof Hughes said.

The imported bumblebee colonies carried a range of parasites including the three main bumblebee parasites (Crithidia bombi, Nosema bombi and Apicystis bombi), three honeybee parasites (Nosema apis, Ascosphaera apis and Paenibacillus larvae), and two parasites that infect both bumblebees and honeybees (Nosema ceranae and deformed wing virus).

The team also found parasites in the pollen food supplied with the bees.

The scientists say that current regulations governing bumblebee imports are ineffective.

In England, for example, the non-departmental public body responsible for the protection of the environment, Natural England, issues licences for the release of non-native bumblebee subspecies.

But this study found parasites in both native and non-native subspecies that were commercially reared in Europe, and no licences are required to release native subspecies into the environment.

Natural England said under current regulations it was "not possible to impose disease control conditions or environmental safeguards on the release of imported bumblebees which originally descended from British bumblebees".

"It is therefore of particular concern that this research has revealed that imported bees - descended from British stock - have been found to be carrying disease," its statement added.

"Our licensing regime stipulates that where non-native bumblebees are used, they must be disease free, only used within polytunnels or greenhouses, using hives from which queens cannot escape, and that all hives and surviving bees must be destroyed at the end of their use."

But the researchers say that regulatory authorities need to strengthen measures to prevent importation of parasite-carrying bumblebee colonies, including checking bees on arrival in the UK and extending regulations to cover imported colonies of the native subspecies.

Prof Hughes said: "If we don't act, then the risk is that potentially tens of thousands of parasite-carrying bumblebee colonies may be imported into the UK each year, and hundreds of thousands worldwide.

"Many bee species are already showing significant population declines," he said.

"The introduction of more or new parasite infections will at a minimum exacerbate this, and could quite possibly directly drive declines." More

 

Dietary Fructose Causes Liver Damage in Animal Model

June 19, 2013 — The role of dietary fructose in the development of obesity and fatty liver diseases remains controversial, with previous studies indicating that the problems resulted from fructose and a diet too high in calories.

Fructose is the most commonly added sugar in the American diet

However, a new study conducted in an animal model at Wake Forest Baptist Medical Center showed that fructose rapidly caused liver damage even without weight gain. The researchers found that over the six-week study period liver damage more than doubled in the animals fed a high-fructose diet as compared to those in the control group.

The study is published in the June 19 online edition of the American Journal of Clinical Nutrition.

“Is a calorie a calorie? Are they all created equal? Based on this study, we would say not,” said Kylie Kavanagh, D.V.M., assistant professor of pathology-comparative medicine at Wake Forest Baptist and lead author of the study.

In a previous trial which is referenced in the current journal article, Kavanagh’s team studied monkeys who were allowed to eat as much as they wanted of low-fat food with added fructose for seven years, as compared to a control group fed a low-fructose, low-fat diet for the same time period. Not surprisingly, the animals allowed to eat as much as they wanted of the high-fructose diet gained 50 percent more weight than the control group. They developed diabetes at three times the rate of the control group and also developed hepatic steatosis, or non-alcoholic fatty liver disease.

The big question for the researchers was what caused the liver damage. Was it because the animals got fat from eating too much, or was it something else?

To answer that question, this study was designed to prevent weight gain. Ten middle-aged, normal weight monkeys who had never eaten fructose were divided into two groups based on comparable body shapes and waist circumference. Over six weeks, one group was fed a calorie-controlled diet consisting of 24 percent fructose, while the control group was fed a calorie-controlled diet with only a negligible amount of fructose, approximately 0.5 percent.

Both diets had the same amount of fat, carbohydrate and protein, but the sources were different, Kavanagh said. The high-fructose group’s diet was made from flour, butter, pork fat, eggs and fructose (the main ingredient in corn syrup), similar to what many people eat, while the control group’s diet was made from healthy complex carbohydrates and soy protein.

Every week the research team weighed both groups and measured their waist circumference, then adjusted the amount of food provided to prevent weight gain. At the end of the study, the researchers measured biomarkers of liver damage through blood samples and examined what type of bacteria was in the intestine through fecal samples and intestinal biopsies.

“What surprised us the most was how quickly the liver was affected and how extensive the damage was, especially without weight gain as a factor,” Kavanagh said. “Six weeks in monkeys is roughly equivalent to three months in humans.”

In the high-fructose group, the researchers found that the type of intestinal bacteria hadn’t changed, but that they were migrating to the liver more rapidly and causing damage there. It appears that something about the high fructose levels was causing the intestines to be less protective than normal, and consequently allowing the bacteria to leak out at a 30 percent higher rate, Kavanagh said.

One of the limitations of the study was that it only tested for fructose and not dextrose. Fructose and dextrose are simple sugars found naturally in plants.

“We studied fructose because it is the most commonly added sugar in the American diet, but based on our study findings, we can’t say conclusively that fructose caused the liver damage,” Kavanagh said. “What we can say is that high added sugars caused bacteria to exit the intestines, go into the blood stream and damage the liver. More

If you want to a kill a honeybee hive’s buzz, take all its honey away and feed the bees a steady diet of high-fructose corn syrup. Believe it or not, apiarists have been doing just that since the 1970s — feeding HFCS to their colonies as a replacement source of nourishment for the honey that gets taken away from them to be sold. And believe it or not, HFCS, which is bad for humans, is also bad for honeybees. It’s especially bad for those that are exposed to pesticides, which these days is a high proportion of them. Grist

 

Russia Warns Obama: Global War Over “Bee Apocalypse” Coming Soon

The shocking minutes relating to President Putin’s meeting this past week with US Secretary of State John Kerry reveal the Russian leaders “extreme outrage” over the Obama regimes continued protection of global seed and plant bio-genetic giants Syngenta and Monsanto in the face of a growing “bee apocalypse” that the Kremlin warns “will most certainly” lead to world war.

According to these minutes, released in the Kremlin today by the Ministry of Natural Resources and Environment of the Russian Federation (MNRE), Putin was so incensed over the Obama regimes refusal to discuss this grave matter that he refused for three hours to even meet with Kerry, who had traveled to Moscow on a scheduled diplomatic mission, but then relented so as to not cause an even greater rift between these two nations.

At the center of this dispute between Russia and the US, this MNRE report says, is the “undisputed evidence” that a class of neuro-active insecticides chemically related to nicotine, known as neonicotinoids, are destroying our planets bee population, and which if left unchecked could destroy our world’s ability to grow enough food to feed its population.

So grave has this situation become, the MNRE reports, the full European Commission (EC) this past week instituted a two-year precautionary ban (set to begin on 1 December 2013) on these “bee killing” pesticidesfollowing the lead of Switzerland, France, Italy, Russia, Slovenia and Ukraine, all of whom had previously banned these most dangerous of genetically altered organisms from being used on the continent.

Two of the most feared neonicotinoids being banned are Actara and Cruiser made by the Swiss global bio-tech seed and pesticide giant Syngenta AG which employs over 26,000 people in over 90 countries and ranks third in total global sales in the commercial agricultural seeds market.

Important to note, this report says, is that Syngenta, along with bio-tech giants Monsanto, Bayer, Dow and DuPont, now control nearly 100% of the global market for genetically modified pesticides, plants and seeds.

Also to note about Syngenta, this report continues, is that in 2012 it was criminally charged in Germany for concealing the fact that its genetically modified corn killed cattle, and settled a class-action lawsuit in the US for $105 million after it was discovered they had contaminated the drinking supply of some 52 million Americans in more than 2,000 water districts with its “gender-bending” herbicide Atrazine.

To how staggeringly frightful this situation is, the MNRE says, can be seen in the report issued this past March by the American Bird Conservancy (ABC) wherein they warned our whole planet is in danger, and as we can, in part, read:

“As part of a study on impacts from the world’s most widely used class of insecticides, nicotine-like chemicals called neonicotinoids, American Bird Conservancy (ABC) has called for a ban on their use as seed treatments and for the suspension of all applications pending an independent review of the products’ effects on birds, terrestrial and aquatic invertebrates, and other wildlife.

“It is clear that these chemicals have the potential to affect entire food chains. The environmental persistence of the neonicotinoids, their propensity for runoff and for groundwater infiltration, and their cumulative and largely irreversible mode of action in invertebrates raise significant environmental concerns,” said Cynthia Palmer, co-author of the report and Pesticides Program Manager for ABC, one of the nation’s leading bird conservation organizations.

ABC commissioned world renowned environmental toxicologist Dr. Pierre Mineau to conduct the research. The 100-page report, “The Impact of the Nation’s Most Widely Used Insecticides on Birds,” reviews 200 studies on neonicotinoids including industry research obtained through the US Freedom of Information Act. The report evaluates the toxicological risk to birds and aquatic systems and includes extensive comparisons with the older pesticides that the neonicotinoids have replaced. The assessment concludes that the neonicotinoids are lethal to birds and to the aquatic systems on which they depend.

“A single corn kernel coated with a neonicotinoid can kill a songbird,” Palmer said. “Even a tiny grain of wheat or canola treated with the oldest neonicotinoid — called imidacloprid — can fatally poison a bird. And as little as 1/10th of a neonicotinoid-coated corn seed per day during egg-laying season is all that is needed to affect reproduction.”

The new report concludes that neonicotinoid contamination levels in both surface- and ground water in the United States and around the world are already beyond the threshold found to kill many aquatic invertebrates.” More

 

Seeds of Death: Unveiling The Lies of GMO's - Full Movie

Seeds of Death: Unveiling The Lies of GMO's - Full Movie

Monsanto's Questionable Relationship With The US Government

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Neonicotinoid pesticides 'damage brains of bees'

Commonly used pesticides are damaging honey bee brains, studies suggest.

Scientists have found that two types of chemicals called neonicotinoids and coumaphos are interfering with the insect's ability to learn and remember.

Experiments revealed that exposure was also lowering brain activity, especially when the two pesticides were used in combination.

The research is detailed in two papers in Nature Communications and the Journal of Experimental Biology.

But a company that makes the substances said laboratory-based studies did not always apply to bees in the wild.

And another report, published by the Defra's Food and Environment Research Agency (Fera), concluded that there was no link between bee health and exposure to neonicotinoids.

The government agency carried out a study looking at bumblebees living on the edges of fields treated with the chemicals.

Falling numbers

Honey bees around the world are facing an uncertain future.

They have been hit with a host of diseases, losses of habitat, and in the US the mysterious Colony Collapse Disorder has caused numbers to plummet.

Continue reading the main story

“Start Quote

It would imply that the bees are able to forage less effectively”

Dr Sally WilliamsonNewcastle University

Now researchers are asking whether pesticides are also playing a role in their decline.

To investigate, scientists looked at two common pesticides: neonicotinoids, which are used to control pests on oil seed rape and other crops, and a group of organophosphate chemicals called coumaphos, which are used to kill the Varroa mite, a parasite that attacks the honey bee.

Neonicotinoids are used more commonly in Europe, while coumaphos are more often employed in the United States.

Work carried out by the University of Dundee, in Scotland, revealed that if the pesticides were applied directly to the brains of the pollinators, they caused a loss of brain activity.

Dr Christopher Connolly said: "We found neonicotinoids cause an immediate hyper-activation - so an epileptic type activity - this was proceeded by neuronal inactivation, where the brain goes quiet and cannot communicate any more. The same effects occur when we used organophosphates.

"And if we used them together, the effect was additive, so they added to the toxicity: the effect was greater when both were present."

Another series of laboratory-based experiments, carried out at Newcastle University, examined the behaviour of the bees.

The researchers there found that bees exposed to both pesticides were unable to learn and then remember floral smells associated with a sweet nectar reward - a skill that is essential for bees in search of food.

Dr Sally Williamson said: "It would imply that the bees are able to forage less effectively, they are less able to find and learn and remember and then communicate to their hive mates what the good sources of pollen and nectar are."

'No threat'

She said that companies that are manufacturing the pesticides should take these findings into account when considering the safety of the chemicals.

Continue reading the main story

“Start Quote

Decisions on the use of neonicotinoids must be based on sound scientific evidence”

Ian BoydDefra

She explained: "At the moment, the initial tests for bee toxicity are giving the bees an acute dose and then watching them to see if they die.

"But because bees do these complex learning tasks, they are very social animals and they have a complex behavioural repertoire, they don't need to be killed outright in order not to be affected."

The European Commission recently called for a temporary moratorium on the use of neonicotinoids after a report by the European Food Safety Authority concluded that they posed a high acute risk to pollinators.

But 14 out of the 27 EU nations - including the UK and Germany - opposed the ban, and the proposal has now been delayed.

Ian Boyd, chief scientist at Defra, said: "Decisions on the use of neonicotinoids must be based on sound scientific evidence." More