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Chronic exposure to neonicotinoids reduces honey bee health near corn crops

Damage confirmedEarly studies of the impacts of neonicotinoid insecticides on insect pollinators indicated considerable harm. However, lingering criticism was that the studies did not represent field-realistic levels of the chemicals or prevailing environmental conditions. Two studies, conducted on... Full description

Journal Title: Science June 30, 2017, Vol.356(6345), pp.1395-1397
Main Author: Tsvetkov, N
Other Authors: Samson-Robert, O , Sood, K , Patel, H , Malena, Da , Gajiwala, Ph , Maciukiewicz, P , Fournier, V , Zayed, A
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0036-8075 ; DOI: 10.1126/science.aam7470
Link: http://search.proquest.com/docview/1919953954/
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title: Chronic exposure to neonicotinoids reduces honey bee health near corn crops
format: Article
creator:
  • Tsvetkov, N
  • Samson-Robert, O
  • Sood, K
  • Patel, H
  • Malena, Da
  • Gajiwala, Ph
  • Maciukiewicz, P
  • Fournier, V
  • Zayed, A
subjects:
  • Mortality
  • Overwintering
  • Survival
  • Immunity
  • Acute Toxicity
  • Agrochemicals
  • Crops
  • Pollen
  • Workers
  • Colonies
  • Insecticides
  • Pollinators
  • Chronic Exposure
  • Fungicides
  • Reproduction
  • Immune Response
  • Environmental Conditions
  • Apis Mellifera
  • Physiology, Anatomy, and Biochemistry
ispartof: Science, June 30, 2017, Vol.356(6345), pp.1395-1397
description: Damage confirmedEarly studies of the impacts of neonicotinoid insecticides on insect pollinators indicated considerable harm. However, lingering criticism was that the studies did not represent field-realistic levels of the chemicals or prevailing environmental conditions. Two studies, conducted on different crops and on two continents, now substantiate that neonicotinoids diminish bee health (see the Perspective by Kerr). Tsvetkov et al. find that bees near corn crops are exposed to neonicotinoids for 3 to 4 months via nontarget pollen, resulting in decreased survival and immune responses, especially when coexposed to a commonly used agrochemical fungicide. Woodcock et al., in a multicounty experiment on rapeseed in Europe, find that neonicotinoid exposure from several nontarget sources reduces overwintering success and colony reproduction in both honeybees and wild bees. These field results confirm that neonicotinoids negatively affect pollinator health under realistic agricultural conditions.Science, this issue p. 1395, p. 1393; see also p. 1331 Experiments linking neonicotinoids and declining bee health have been criticized for not simulating realistic exposure. Here we quantified the duration and magnitude of neonicotinoid exposure in Canada's corn-growing regions and used these data to design realistic experiments to investigate the effect of such insecticides on honey bees. Colonies near corn were naturally exposed to neonicotinoids for up to 4 months-the majority of the honey bee's active season. Realistic experiments showed that neonicotinoids increased worker mortality and were associated with declines in social immunity and increased queenlessness over time. We also discovered that the acute toxicity of neonicotinoids to honey bees doubles in the presence of a commonly encountered fungicide. Our work demonstrates that field-realistic exposure to neonicotinoids can reduce honey bee health in corn-growing regions.
language: eng
source:
identifier: ISSN: 0036-8075 ; DOI: 10.1126/science.aam7470
fulltext: no_fulltext
issn:
  • 00368075
  • 0036-8075
url: Link


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titleChronic exposure to neonicotinoids reduces honey bee health near corn crops
creatorTsvetkov, N ; Samson-Robert, O ; Sood, K ; Patel, H ; Malena, Da ; Gajiwala, Ph ; Maciukiewicz, P ; Fournier, V ; Zayed, A
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ispartofScience, June 30, 2017, Vol.356(6345), pp.1395-1397
identifierISSN: 0036-8075 ; DOI: 10.1126/science.aam7470
subjectMortality ; Overwintering ; Survival ; Immunity ; Acute Toxicity ; Agrochemicals ; Crops ; Pollen ; Workers ; Colonies ; Insecticides ; Pollinators ; Chronic Exposure ; Fungicides ; Reproduction ; Immune Response ; Environmental Conditions ; Apis Mellifera ; Physiology, Anatomy, and Biochemistry
descriptionDamage confirmedEarly studies of the impacts of neonicotinoid insecticides on insect pollinators indicated considerable harm. However, lingering criticism was that the studies did not represent field-realistic levels of the chemicals or prevailing environmental conditions. Two studies, conducted on different crops and on two continents, now substantiate that neonicotinoids diminish bee health (see the Perspective by Kerr). Tsvetkov et al. find that bees near corn crops are exposed to neonicotinoids for 3 to 4 months via nontarget pollen, resulting in decreased survival and immune responses, especially when coexposed to a commonly used agrochemical fungicide. Woodcock et al., in a multicounty experiment on rapeseed in Europe, find that neonicotinoid exposure from several nontarget sources reduces overwintering success and colony reproduction in both honeybees and wild bees. These field results confirm that neonicotinoids negatively affect pollinator health under realistic agricultural conditions.Science, this issue p. 1395, p. 1393; see also p. 1331 Experiments linking neonicotinoids and declining bee health have been criticized for not simulating realistic exposure. Here we quantified the duration and magnitude of neonicotinoid exposure in Canada's corn-growing regions and used these data to design realistic experiments to investigate the effect of such insecticides on honey bees. Colonies near corn were naturally exposed to neonicotinoids for up to 4 months-the majority of the honey bee's active season. Realistic experiments showed that neonicotinoids increased worker mortality and were associated with declines in social immunity and increased queenlessness over time. We also discovered that the acute toxicity of neonicotinoids to honey bees doubles in the presence of a commonly encountered fungicide. Our work demonstrates that field-realistic exposure to neonicotinoids can reduce honey bee health in corn-growing regions.
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titleChronic exposure to neonicotinoids reduces honey bee health near corn crops
descriptionDamage confirmedEarly studies of the impacts of neonicotinoid insecticides on insect pollinators indicated considerable harm. However, lingering criticism was that the studies did not represent field-realistic levels of the chemicals or prevailing environmental conditions. Two studies, conducted on different crops and on two continents, now substantiate that neonicotinoids diminish bee health (see the Perspective by Kerr). Tsvetkov et al. find that bees near corn crops are exposed to neonicotinoids for 3 to 4 months via nontarget pollen, resulting in decreased survival and immune responses, especially when coexposed to a commonly used agrochemical fungicide. Woodcock et al., in a multicounty experiment on rapeseed in Europe, find that neonicotinoid exposure from several nontarget sources reduces overwintering success and colony reproduction in both honeybees and wild bees. These field results confirm that neonicotinoids negatively affect pollinator health under realistic agricultural conditions.Science, this issue p. 1395, p. 1393; see also p. 1331 Experiments linking neonicotinoids and declining bee health have been criticized for not simulating realistic exposure. Here we quantified the duration and magnitude of neonicotinoid exposure in Canada's corn-growing regions and used these data to design realistic experiments to investigate the effect of such insecticides on honey bees. Colonies near corn were naturally exposed to neonicotinoids for up to 4 months-the majority of the honey bee's active season. Realistic experiments showed that neonicotinoids increased worker mortality and were associated with declines in social immunity and increased queenlessness over time. We also discovered that the acute toxicity of neonicotinoids to honey bees doubles in the presence of a commonly encountered fungicide. Our work demonstrates that field-realistic exposure to neonicotinoids can reduce honey bee health in corn-growing regions.
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abstractDamage confirmedEarly studies of the impacts of neonicotinoid insecticides on insect pollinators indicated considerable harm. However, lingering criticism was that the studies did not represent field-realistic levels of the chemicals or prevailing environmental conditions. Two studies, conducted on different crops and on two continents, now substantiate that neonicotinoids diminish bee health (see the Perspective by Kerr). Tsvetkov et al. find that bees near corn crops are exposed to neonicotinoids for 3 to 4 months via nontarget pollen, resulting in decreased survival and immune responses, especially when coexposed to a commonly used agrochemical fungicide. Woodcock et al., in a multicounty experiment on rapeseed in Europe, find that neonicotinoid exposure from several nontarget sources reduces overwintering success and colony reproduction in both honeybees and wild bees. These field results confirm that neonicotinoids negatively affect pollinator health under realistic agricultural conditions.Science, this issue p. 1395, p. 1393; see also p. 1331 Experiments linking neonicotinoids and declining bee health have been criticized for not simulating realistic exposure. Here we quantified the duration and magnitude of neonicotinoid exposure in Canada's corn-growing regions and used these data to design realistic experiments to investigate the effect of such insecticides on honey bees. Colonies near corn were naturally exposed to neonicotinoids for up to 4 months-the majority of the honey bee's active season. Realistic experiments showed that neonicotinoids increased worker mortality and were associated with declines in social immunity and increased queenlessness over time. We also discovered that the acute toxicity of neonicotinoids to honey bees doubles in the presence of a commonly encountered fungicide. Our work demonstrates that field-realistic exposure to neonicotinoids can reduce honey bee health in corn-growing regions.
doi10.1126/science.aam7470
urlhttp://search.proquest.com/docview/1919953954/
eissn10959203
date2017-06-30