Health Canada said as much Thursday as it released its final re-evaluation decisions for three neonic pesticides — re-evaluations dealing specifically with the products’ potential impacts on bees and other pollinators.

The department’s assessments of the three neonics — clothianidin, imidacloprid and thiamethoxam — show “varying effects on bees and other pollinators from exposure to each of these pesticides.”

For those reasons, Health Canada said, its final decision calls for outright cancellation of some uses of the three neonics, mainly affecting the horticulture and tree fruit sectors.

For some other uses, the department plans to change conditions of use, such as “restricting the timing of application” and adding new “label statements” for uses such as cereal seed treatments.

Uses such as canola seed treatments and on greenhouse vegetables “are not expected to pose unacceptable risks to bees and other pollinators,” the agency said Thursday.

Crop protection industry group CropLife Canada hailed much of Health Canada’s announcement Thursday, saying it “affirm(s) the safety of neonics as a seed treatment and for many other uses.”

The department’s decision “confirms that in the vast majority of cases, neonics can be used effectively by farmers without unnecessary risk to pollinators,” CropLife CEO Pierre Petelle said in a statement via email.

Grain Farmers of Ontario CEO Barry Senft, in a separate statement, noted growers in that province “take several steps to protect pollinators on their farms and (Health Canada’s) decision shows that these efforts are working, as is the regulatory system that works to protect human health and the environment.”

Health Canada has been re-evaluating the three neonics since 2012 to” address growing concerns around bee health” and issued proposed decisions for clothianidin, imidacloprid and thiamethoxam in December 2017, May 2018 and December 2017, respectively.

Neonic seed treatments, Petelle said, “represent an incredible innovation that has improved agricultural sustainability and limited exposure to non-target organisms due to the very precise application of the product on the seed.”

However, he warned, the planned new restrictions and cancellations Health Canada announced Thursday will leave many growers, particularly in the hort sector, “severely impacted.”

In many cases, he said, for those growers, “there are no viable alternatives… to control certain insect pests and removing neonics for growing certain horticulture crops like apples and cherries may jeopardize the viability of certain types of fruit and vegetable production in Canada.”

The decisions

For clothianidin, Health Canada’s final pollinator decision will cancel foliar application on orchard trees and strawberries and on municipal, industrial and residential turf sites. It also limits the number of foliar applications on cucurbit vegetables to one per season.

Also, “additional label statements” will be required for clothianidin seed treatment of cereal crops.

For imidacloprid, the final pollinator decision will cancel foliar application to pome fruit, stone fruit, certain tree nuts with “high pollinator attractiveness,” lavender and rosemary. It will also cancel soil application on legume, fruiting, and cucurbit vegetables when grown outdoors; herbs harvested after bloom; small fruit and berries (caneberry; bushberry; low-growing berry; berry and small fruit vine excluding grapes); and ornamentals that are “attractive to pollinators and planted outside.”

The department would also prohibit foliar spraying of imidacloprid before or during bloom on fruiting vegetables, herbs that are harvested after bloom, legume vegetables (broad beans, fava beans andVicia faba), berry crops (with renovation after harvest for woody berries), and tree nuts apart from those with high pollinator attractiveness.

Also, additional label statements will be required for imidacloprid seed treatment of cereal and legume crops.

For thiamethoxam, Health Canada proposes to cancel foliar and soil application on ornamental crops “that will result in pollinator exposure” — in other words, crops that are planted outdoors and attractive to pollinators. It will also cancel soil application for berry crops, cucurbit crops and fruiting vegetables, and foliar application to orchard trees.

Health Canada will also prohibit spraying of thiamethoxam before or during bloom in foliar application on legume and outdoor fruiting vegetables, and on berry crops, with “renovation required” for woody berries. Foliar application on sweet potato and potato would not be allowed during bloom.

Also, “additional label statements” for thiamethoxam will be required for seed treatments of cereal and legume crops.

Risks ‘not imminent’

Health Canada proposes to put all the above risk mitigation measures in place over a 24-month period. “The risks identified (to pollinators) are not considered imminent because they are not expected to cause irreversible harm over this period,” the department said.

Members of the public have 60 days from the final decisions’ publication date to file any notices of objection, Health Canada said.

The department also noted Thursday it already put risk mitigation measures in place in 2014 to help protect bees and other pollinators from exposure to neonic-laden dust kicked up during planting of treated seeds.

With the risk mitigation measures in place from 2014 onward, Health Canada said Thursday, the number of bee incidents in 2014, 2015 and 2016 were 70-80 per cent lower than in 2013. Further decline was seen in the number of incidents reported during planting in 2017 and 2018.

Health Canada on Thursday also granted that “other factors” such as favourable weather conditions might have also contributed to the reduction in bee “incidents” and bee deaths in the crop years since 2014.

Phase-outs still proposed

All this said, the agency’s final pollinator re-evaluation decisions have no bearing on Health Canada’s separate ongoing evaluations of the “potential risks to aquatic insects” from the use of neonics.

Final decisions on those evaluations are expected at the end of this year, Health Canada said Thursday — but the department also reiterated that current research shows neonics are “detected frequently in waterbodies at levels that could be harmful to certain aquatic organisms.”

Health Canada in 2016 proposed a phase-out of most uses of imidacloprid over three to five years after a routine re-evaluation by its Pest Management Regulatory Agency (PMRA) found imidacloprid showing up at levels harmful to certain aquatic insect populations such as mayflies and midges — a “critical food source” for fish, birds and other animals.

Special reviews for both clothianidin and thiamethoxam were announced in the wake of those findings on imidacloprid. Those reviews, released last summer, found both pesticides being measured at levels harmful to aquatic insects.

As a result, Health Canada also proposed last summer to cancel all outdoor (that is, non-greenhouse) agricultural and turf uses for clothianidin, and all outdoor agricultural and ornamental uses for thiamethoxam, over three to five years, depending on availability of alternatives.

In Canada, clothianidin is marketed by Bayer as insecticides and seed treatments under brand names including Poncho, Prosper, Titan and Sepresto and by Nufarm as NipsIt.

Thiamethoxam products include Cruiser and Helix, marketed by Syngenta, while imidacloprid is sold mainly by Bayer under brands such as Admire, Gaucho, Concept and Intercept. — Glacier FarmMedia Network

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Health Canada’s Pest Management Regulatory Agency (PMRA) is proposing that two neonicotinoid pesticides, clothianidin and thiamethoxam, be phased out over the next three to five years.

Following special reviews, PMRA found that the pesticides are harmful to aquatic insects which are a major source of food for fish, birds and other animals.

The chemicals are widely used as seed treatments for the majority of canola grown in Western Canada. While the impact on bees is often mentioned in discussions on neonics, PMRA itself came out with a proposed decision in 2017 noting that the neonicotinoid seed treatments don’t negatively hurt pollinators, including bees.

“These seed treatments are used on canola to prevent the young plants from being eaten by flea beetles,” said Brian Innes, vice-president of public affairs with the Canola Council of Canada.

“We’re concerned about not having these products will have a significant impact on the canola industry,” said Innes adding “it will mean increased risks and reduced yields.”

It can be very hard to predict when the insect when flea beetles will strike a field and individual fields can be lost in as little as 36 hours, according to Innes. While foliar chemical applications are an option, the small window makes control difficult.

“If we remove the neonicotinoids, it forces people to use other alternatives,” said John Gavloski, extension entomologist with Manitoba Agriculture. There are trade-offs with other pesticides, he said, making it hard to determine the eventual impact on crop production.

Diamides are a group of chemicals that can also be used as a seed treatment against flea beetles, he said. They are not as water-soluble as neonicotinoids — which comes with its own pros and cons.

The lower water solubility of diamides means they are slower to react. However, with neonicotinoids, a rain right after planting can wash away much of the seed treatment, which would not be the case with diamides.

Gavloski said more chemical options were also being researched and should be available for the market soon.

While more tools could take the place of neonicotinoids, “we’re very concerned as a canola industry, because any tool that’s taken away from farmers has a negative impact on their ability to produce canola and manage their risk,” said Innes.

Small impacts on yields could lead to hundreds of millions of dollars of losses in the bigger picture, he said.

There is a 90-day window of comment on the PMRA proposals, and Innes said the Canola Council will review the decision to make sure all of the available information was taken into account.

“We as a canola industry very much value a science-based review process,” he said.

— Phil Franz-Warkentin writes for Commodity News Service Canada, a Glacier FarmMedia company specializing in grain and commodity market reporting. Follow him at @PhilFW on Twitter.

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PMRA officials on Wednesday announced 90-day consultation periods on its decisions for both clothianidin and thiamethoxam, following “special reviews” which found both substances being measured at levels harmful to aquatic insects.

Clothianidin, under its current conditional registration, is marketed by Bayer in Canada as insecticides and seed treatments under brand names including Poncho, Prosper, Titan and Sepresto and by Nufarm as NipsIt. Thiamethoxam’s conditional registration covers products such as Cruiser and Helix, marketed by Syngenta.

PMRA proposes to cancel all outdoor agricultural and turf uses for clothianidin, and all outdoor (non-greenhouse) agricultural and ornamental uses for thiamethoxam, over three to five years, depending on availability of alternatives.

Scott Kirby, director general of PMRA’s environmental assessment directorate, said on a conference call with reporters Wednesday that most affected products would be phased out over the shorter period as alternatives are available.

Final special review decisions are to be announced at the end of next year, Health Canada said, and “will take into consideration any comments or new information received during the consultation period.”

Special reviews for both neonics were announced in November 2016 in the wake of PMRA’s routine re-evaluation of the third major neonic, imidacloprid, sold mainly by Bayer under brands such as Admire, Gaucho, Concept and Intercept.

Through that re-evaluation, Health Canada said it found imidacloprid being measured at levels harmful to certain aquatic insect populations such as mayflies and midges — a “critical food source” for fish, birds and other animals. The department thus proposed to phase out most uses of imidacloprid over three to five years.

Special reviews, Health Canada said, are launched based on “reasonable grounds to believe that the health or environmental risks, or the value (including effectiveness), of a pesticide is unacceptable.”

An environmental assessment of clothianidin showed that, in aquatic environments in Canada, the product is being measured at concentrations that are harmful to aquatic insects and most outdoor uses of clothianidin in Canada thus are “not sustainable.”

Modelling results from a risk assessment for thiamethoxam showed a “minimal acute risk to freshwater invertebrates” but found exposure on a “chronic basis” poses a risk to those species, Health Canada said.

However, the agency deemed the risks to aquatic invertebrates from greenhouse uses of thiamethoxam to be “acceptable” and plans to allow the chemical’s continued registration for greenhouse uses, “provided wastewater mitigation instructions on product labels are followed.”

For both neonics, PMRA said it will consider any “alternate risk management proposals” put forward during the comment period, “provided that they can achieve acceptable levels in the environment within the same timeframe.”

PMRA had proposed in late 2017 to grant three-year extensions to the registrations for both products, pending the outcome of the special review, while also phasing out certain specific uses of the products to reduce risk to pollinators. Final decisions relating to the pollinator evaluation are expected at the end of this year, Kirby said.

Grain Growers of Canada, in a separate statement Wednesday, said it plans to further review PMRA’s proposed decisions.

Meanwhile, GGC president Jeff Nielsen said, the group is concerned that PMRA’s re-evaluation process “is focused on publishing proposed decisions as fast as possible,” which appears to limit the agency’s ability to ensure “all relevant information” is available.

The focus on speed, he said, also “prevents (PMRA) from engaging farmers so that we can fully understand the issues they raise, which would allow us to provide the PMRA with the information required to refine these decisions.”

Both products “are very important for our growers, and without viable alternatives, the ban will significantly impact the canola sector,” Brian Innes, vice-president of public affairs for the Canola Council of Canada, said in a separate release.

The council, which said it will also “thoroughly review” the PMRA proposal, on Wednesday cited a 2017 study of European growers’ experience without neonics, showing increased risk of insect damage, lower yields and, as a result, fewer canola acres.

“With more than 22 million acres of canola in Canada in 2018, banning these plant protection tools would have a dramatic impact,” the council said.

CropLife Canada, representing the crop protection industry, said it found the PMRA proposal “especially disappointing and confusing to many, given that earlier this year the PMRA released a seemingly contradictory proposed decision validating the safety of both of these products to pollinators as seed treatments, which is one of their primary uses.”

CropLife CEO Pierre Petelle said Wednesday the organization will also review the PMRA’s proposals and data, “correct any misinterpretation of the data and provide comments to address any information gaps identified.”

The Reuters news agency on Wednesday quoted a Syngenta Canada spokesperson as saying the company is disappointed with the decision and believes the PMRA did not consider all relevant information. Reuters also quoted a Bayer spokesperson as saying the company believes clothianidin has a “favourable environmental profile.” — Glacier FarmMedia Network

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“Insect biomass has fallen by more than 75 per cent in the last 27 years in Germany,” according to the paper seen by Reuters on Wednesday, saying the main factor was the disproportionate use of herbicides and pesticides.

The ministry, led by the Social Democrats (SPD) who share power with Chancellor Angela Merkel’s conservatives, also said it planned to increase the proportion of farmed land that would have to adhere to environmental stipulations.

Conditions for fertilizer use should be extended, including making subsidies dependent on using insect-friendly chemicals, the ministry paper said.

The move to make it more difficult to get a permit to use agrochemicals follows plans drawn up by conservative Agriculture Minister Julia Kloeckner to limit the use of glyphosate herbicide.

Germany has also backed EU plans to ban neonicotinoids, insecticides that studies show can harm honey bees.

— Reporting for Reuters by Hans-Edzard Busemann; writing by Madeline Chambers.

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The ban, championed by environmental activists, covers the use of three active substances — imidacloprid, developed by Bayer CropScience; clothianidin, developed by Takeda Chemical Industries and Bayer CropScience; and Syngenta’s thiamethoxam.

“All outdoor uses will be banned and the neonicotinoids in question will only be allowed in permanent greenhouses where exposure of bees is not expected,” the European Commission said in a statement.

Representatives of EU member states in the EC’s standing committee on plants, animals, food and feed on Friday supported the proposal for a new regulation to be adopted by the EC “in the coming weeks” and applicable “by the end of the year.”

Vytenis Andriukaitis, the EC’s commissioner for health and food safety, hailed the results of Friday’s vote, saying the EC “had proposed these measures months ago, on the basis of the scientific advice from the European Food Safety Authority.”

Bee health, he said, “remains of paramount importance for me since it concerns biodiversity, food production and the environment.”

Bayer called the ban “a sad day for farmers and a bad deal for Europe” and said it would not help bees. Many farmers, it said, had no other way of controlling pests and that the result was more spraying and a return to older, less effective chemicals.

The use of neonics in the European Union has been restricted to certain crops since 2013, but environmental groups have called for a total ban and sparked a debate across the continent about the wider use of chemicals in farming.

Campaign group Friends of the Earth described the decision of EU governments a “tremendous victory” for bees and for the environment.

“The European Commission must now focus on developing a strong pollinator initiative that boosts bee-friendly habitat and helps farmers cut pesticide use,” it said.

Both Bayer and Syngenta have challenged the 2013 partial ban at the European Court of Justice. A verdict is due on May 17.

Bayer, in a separate move Thursday, announced it would sell its clothianidin-based seed treatment brands Poncho and VOTiVO to fellow German chemical firm BASF.

The brands are part of a $2.65 billion asset sale to help clear the regulatory path for Bayer’s planned takeover of seed and ag chem firm Monsanto.

In Canada, two of the three neonics in question, clothianidin and thiamethoxam, are up for renewal of their conditional registrations as seed treatments and foliar- and soil-applied pesticides in field crops.

Health Canada’s Pest Management Regulatory Agency in December proposed to renew those registrations to the end of 2019.

For imidacloprid, PMRA in November proposed a three- to five-year phase-out of all agricultural uses and a “majority of other outdoor uses” of the product, citing the chemical’s presence in waterways at levels harmful to aquatic insects.

Final decisions from the PMRA on both proposals are due later this year.

— Reporting for Reuters by Philip Blenkinsop; includes files from AGCanada.com Network staff.

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The Pest Management Regulatory Agency on Tuesday issued proposed decisions on clothianidin and thiamethoxam that would extend the products’ existing conditional registrations as seed treatments and foliar- and soil-applied pesticides in field crops, to the end of 2019.

Clothianidin, under its current conditional registration, is marketed in Canada as insecticides and seed treatments under brand names including Poncho, Prosper, Nipsit, Titan and Sepresto. Thiamethoxam’s conditional registration covers products such as Cruiser and Helix.

The agency’s proposed decision stems from the re-evaluations of neonic pesticides it announced in 2012, with an eye on the chemicals’ “potential risk to pollinators in light of international updates to the pollinator risk assessment framework.”

PMRA on Tuesday also announced proposed re-evaluation decisions for clothianidin and thiamethoxam based on its pollinator risk assessments.

For clothianidin, the proposed pollinator re-evaluation calls for the phase-out of its foliar application to orchard trees and strawberries and to municipal, industrial and residential turf sites. It also proposes to reduce pre-bloom applications for cucurbit vegetables (cucumbers, squash, et cetera) from two down to one.

The re-evaluation also calls for added “protective label instructions” for cereal crop uses of clothianidin.

For thiamethoxam, the proposed pollinator re-evaluation calls for the phase-out of foliar and soil applications to ornamental crops that would result in pollinator exposure; of soil application to berry crops, cucurbit crops and fruiting vegetables; and of foliar application to orchard trees.

Foliar application of thiamethoxam to legumes, outdoor fruiting vegetables and berry crops would no longer be permitted before or during bloom, PMRA said.

PMRA’s proposals are now up for a 90-day public comment period, running to March 19, 2018. The agency’s final decisions on the products are due to be published in late 2018.

Recent separate assessments of a third neonic, imidacloprid, found it to be turning up in waterways at levels harmful to aquatic insects, leading PMRA to propose a three- to five-year phase-out of all agricultural uses and a “majority of other outdoor uses” of the product.

The proposal for imidacloprid went through a 120-day public comment period ending in March this year, to be followed by a final PMRA decision on the use of imidacloprid in Canada late next year. PMRA said it also expects to publish a proposed decision on imidacloprid pollinator safety in March 2018.

Clothianidin and thiamethoxam have also been found to occur “frequently and at comparable levels to imidacloprid” in certain waterbodies in areas of intensive agriculture, PMRA said Tuesday.

Consultation is expected in July on proposed measures for clothianidin and thiamethoxam to protect aquatic life. Final decisions on such measures are expected to follow in January 2020.

“Decade of overuse”

The Ontario Beekeepers’ Association on Thursday ripped PMRA’s proposal to continue registration for clothianidin and thiamethoxam “against overwhelming scientific evidence showing acute and chronic effects on bees.”

PMRA’s decision, OBA said, also flies in the face of “the experience of Ontario beekeepers whose bees continue to suffer from a decade of overuse of neonicotinoids on soy, corn and winter wheat.”

Noting PMRA’s plans to call for new labelling on field crop seed treatments, related to reducing dust at planting, OBA said dust from planters represents “less than five per cent of the pesticide applied to seed.”

By focusing its attention to crop dust, OBA said, PMRA “perpetuates the myth that neonicotinoids could be safe for bees if applied properly at planting time.”

Ontario in 2015 moved to limit access to neonic-treated seed only to farmers “who can demonstrate they need protection from the pests targeted” by the products in question, OBA noted.

“Ontario beekeepers are hopeful that Ontario’s Class 12 legislation will allow farmers access to crop protection in a way that also protects our vital insect pollinators,” OBA president Jim Coneybeare said in the association’s release Thursday.

“The only group that could possibly benefit from PMRA’s decision are the manufacturers of these pesticides.” — AGCanada.com Network

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The preliminary ruling by an administrative court in the city of Nice overturned a decision by France’s health and environment agency ANSES in September to grant a permit for the Closer and Transform crop chemicals, which contain the insecticide sulfoxaflor.

ANSES’s authorization of the products angered environmental protection groups, which say they are part of the neonicotinoid family of substances that are being phased out in France because of concern they could be a factor in declining bee populations.

ANSES argued that while sulfoxaflor functioned in a similar way to neonicotinoids, it remains present in soils and plants for a much shorter time.

Friday’s ruling suspends the use of the products in France pending a court hearing to consider detailed arguments from the parties.

Dow AgroSciences SAS, a French subsidiary of the U.S. group, said it planned to appeal the ruling before France’s top administrative court.

“We find this ruling extremely surprising,” Benoit Dattin, communications manager at Dow AgroSciences, said.

“Our products have a very favourable toxicological profile. The problem is that certain associations have put our products in the same basket as neonicotinoids.”

ANSES said in a statement that it had noted the ruling and would continue to examine new evidence, as requested by the government.

Environmental group Generations Futures, which took the case to court, welcomed Friday’s ruling and called for an end to all neonicotinoid products.

Pesticides have come under the spotlight in a divisive EU debate over whether to renew the licence for glyphosate, a widely used weedkiller made popular by Monsanto’s Roundup brand.

The EU’s health regulator approved sulfoxaflor in 2015.

ANSES authorized sulfoxaflor for use on straw cereals like wheat as well as fruit and vegetable crops, but prohibited it for crops that attract pollinating insects and for all crops during flowering periods, noting potential toxic effects for bees.

The court in Nice said it was unclear whether restrictions set out by ANSES on the use of sulfoxaflor would be followed.

Dow Chemical, which in September completed a merger with U.S. peer DuPont to become DowDuPont, said sulfoxaflor is used in more than 40 countries.

In Canada, sulfoxaflor is an approved active ingredient in Dow AgroSciences’ Closer and TwinGuard insecticides, and in a Syngenta seed treatment product, Rascendo.

— Gus Trompiz reports on commodities for Reuters from Paris. Includes files from AGCanada.com Network staff.

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The University of Guelph team, led by toxicologist Keith Solomon and adjunct professor Gladys Stephenson, analyzed 64 papers from “open, peer-reviewed literature” on the topic plus 170 unpublished studies submitted to regulators by the products’ manufacturers, Syngenta and Bayer.

The scientists, who on Monday published their findings online across five papers in the Journal of Toxicology and Environmental Health, said Bayer and Syngenta asked them to assess earlier studies conducted by or for the companies, on the impacts of pesticide-treated seeds on honeybees.

Solomon and Stephenson used a “quantitative weight of evidence” methodology, meant to gauge the quality of reported data and to compare relevance of results from different studies.

The “higher-tier” studies which Solomon and Stephenson examined were focused on the exposures of honeybees to neonicotinoids by way of “several” matrices as measured in the field, and on the effects seen in “experimentally controlled” field studies.

The Guelph team’s study involved Bayer’s clothianidin and imidacloprid and Syngenta’s thiamethoxam, all used in seed treatments for various field crops.

The original papers, Solomon said, varied in quality and “scientific rigour,” but their results generally showed no adverse effects of pesticides on honeybee hives.

For all three products, the “overall weight of evidence,” based on the studies analyzed, indicated “no adverse effects on colony viability or survival of the colony,” the team wrote in the Journal.

“At least for honeybees, these products are not a major concern,” Solomon said in a university release Tuesday — though he granted the three pesticides can kill individual honeybees, and could also pose threats to other pollinators.

That said, “use of these neonics under good agricultural practices does not present a risk to honeybees at the level of the colony.”

“Many studies look at effects of insecticides on individual bees,” he said in a release Tuesday. However, “what regulations try to protect is the colony — the reproductive unit.”

Other researchers, he said, might use the Guelph team’s results to improve studies of pesticide exposure in hives.

The Guelph researchers also stressed the importance of “good agricultural practices” in farmers’ neonic use, including making sure the treated seeds are coated and planted properly to avoid airborne contamination of bees during seeding.

The Guelph team’s results don’t necessarily apply to other insects that also serve as crop pollinators and that have shown population declines, Solomon said.

For those, he said, “there are too few studies at the colony or field level to allow a weight-of-evidence analysis.”

The team said bees and other pollinators are affected by “potentially harmful” factors, including long-distance movement of colonies for crop pollination, as well as mites and viruses, weather, insufficient food and “varying beekeeping practices.” — AGCanada.com Network

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“Studies on the risks of neonicotinoids have often focused on bees that have been experiencing population declines. However, it is not just bees that are being affected by these insecticides,” said Christy Morrissey, U of S biology professor.

Research led by Margaret Eng, a post doctoral fellow in Morrissey’s lab, is the first study to show that imidacloprid (neonicotinoid) and chlorpyrifos (organophosphate) —two of the most widely used insecticides worldwide—are directly toxic to seed-eating songbirds. The paper, published in Scientific Reports, shows these chemicals can directly affect songbird migration.

“These chemicals are having a strong impact on songbirds. We are seeing significant weight loss and the birds’ migratory orientation being significantly altered,” said Eng, who also worked with colleagues from York University. “Effects were seen from eating the equivalent of just three to four imidacloprid treated canola seeds or eight chlorpyrifos granules a day for three days.”

Neonicotinoids have become the most popular class of insecticides among farmers because they are very successful at killing pests and are easy to apply.

“In the past farmers might have placed an insecticide into a crop duster and would spray their fields with the insecticide. However, now farmers have access to seeds that in many cases are already coated with neonicotinoids,” said Morrissey. “Birds that stop on migration are potentially eating these seeds, but can also mistakenly ingest the chlorpyrifos pellets for grit, something they normally eat to aid in the digestion of seeds.”

During a spring migration, Eng and Morrissey captured sparrows, which were then fed daily for three days with either a low or high dose of imidacloprid or chlorpyrifos. Lab experiments showed that the neonicotinoids changed not only the birds’ migratory orientation, but the birds also lost up to 25 per cent of their fat stores and body mass, both of which are detrimental to how a bird successfully migrates.

“What surprised us was how sensitive and rapid the effects were, particularly to imidacloprid,” said Morrissey. “The birds showed a significant loss of body mass and signs of acute poisoning (lethargy and loss of appetite). The migration trials also showed that birds completely failed to orient or changed their northward orientation.”

Research took place at the U of S Facility for Applied Avian Research (FAAR), a facility devoted to ecotoxicology and avian health. The $2.3 million facility opened in May 2016 and FAAR is the only resource of its type in Western Canada.

“We were encouraged that most birds survived, and could recover following the cessation of dosing,” said Eng. “But the effects we saw were severe enough that the birds would likely experience migratory delays or changes in their flight routes that could reduce their chance of survival, or cause a missed breeding opportunity.”

Morrissey said that this research “could have major implications for regulation decisions of these pesticides. Imidacloprid and chlorpyrifos are highly controversial for their safety to the environment or to humans and a decision on a proposed imidacloprid ban in Canada is being considered, with the federal government expected to make a decision on imidacloprid and its use in Canada sometime in December.”

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The study, spearheaded by a team from Switzerland’s Universite de Neuchatel and published in Friday’s edition of the journal Science, was meant to assess “global exposure of pollinators to neonicotinoids.”

The team’s report emphasized the compounds occurred in honey samples “at levels considered safe for human consumption.”

However, the Swiss team wrote, “the contamination confirms the inundation of bees and their environments with these pesticides, despite some recent efforts to decrease their use.”

Of 198 honey samples sourced worldwide through a “citizen science project,” the team found at least one of five tested compounds (acetamiprid, clothianidin, imidacloprid, thiacloprid, thiamethoxam) in 75 per cent of all samples.

Thirty per cent of all samples contained “a single neonicotinoid,” while 45 per cent of the total samples contained “two or more” neonic compounds; 10 per cent contained “four or five.”

The samples were taken from all continents except Antarctica, as well as from “numerous isolated islands.”

The proportion of samples with trace levels of at least one neonic “varied considerably among regions,” with the highest in samples from North America (86 per cent), Asia (80 per cent) and Europe (79 per cent) samples; the lowest proportion was in South American samples at 57 per cent.

In all regions, at least one neonic was recorded in at least 25 per cent of samples, and three neonicotinoids (thiamethoxam, imidacloprid, clothianidin) were recorded in at least 50 per cent of samples in North America, the team wrote.

Imidacloprid “dominated overall concentrations in Africa and South America,” the team added, while thiacloprid led in Europe, acetamiprid in Asia and thiamethoxam in Oceania and North America, “reflecting regional differences in usage of specific pesticide types.”

“Our results confirm the exposure of bees to neonicotinoids in their food throughout the world,” the team wrote, and “the coexistence of neonicotinoids and other pesticides may increase harm to pollinators.”

The Ottawa-based Canadian arm of environmental group Friends of the Earth viewed the Swiss team’s findings as evidence supporting a “complete and permanent ban” on neonic pesticides.

“Bees collect nectar and pollen from their environment and, like the canary in the coal mine, they provide early warning of toxins. This study points to the urgent need to ban neonics,” John Bennett, senior policy advisor for Friends of the Earth Canada, said in a separate release Thursday.

“We also have the right to know what pesticides are being used where and when — it’s time for Canada to require pesticide use reports.”

Specifically, the group said, pesticide users “should be required to report time and location of use,” which would provide “much-needed information on the cocktail of pesticides encountered by honey bees and wild, native bees.” — AGCanada.com Network

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