#Efsa4Bees

Parasites, pathogens and pesticides: making sense of multiple stressors

Latest posts

07.11.16
Ecotox and bees: on the...
Assessing the impact of combinations of environmental pressures on bees at the population and...
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28.10.16
Bee Award winners announced
A habitat-preservation initiative and an innovative mowing technology are the two winners of this...
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25.10.16
Another step towards healthy...
How can scientists assess the health of a honeybee colony?  A piece of work we have just completed...
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Latest News

Bee Stressors

Biological stressors
Chemical stressors
  • Insecticides, including pyrethroids and systemic neonicotinoids such as imidacloprid, thiamethoxam and clothianidin. Insects can be poisoned by spray, dust and through consumption of pollen and nectar.
  • Fungicides such as chlorothalonil, which is used widely in the US on peanuts, potatoes, tomatoes and other crops.
  • Antibiotics including oxytetracycline, which are used to combat diseases such as American Foulbrood.
  • Industrial pollutants can also have effects on the behaviour and health of bees. For example, manganese – a heavy metal commonly used in the production of steel and batteries – can accumulate in the nectar of plants where it is consumed by bees. One study suggests that manganese consumption has a negative impact on bees’ foraging abilities.
Environmental pressure
  • Changes in agricultural methods – particularly the prevalence of monocultures, the practice of growing genetically similar, or identical, plants over a large area, year after year – have destroyed bees’ habitats and floral diversity, thus reducing the food supply.
  • Beekeeping practices such as long-distance transporting for seasonal pollination. 
  • Climate change is also affecting the availability of food and suitable habitats. Global warming is thought to be reducing the range of some species, and extreme events and seasons may be contributing to high mortality rates in hives.

Join the conversation

  • # Efsa4Bees
    Mariya Gabriel Verified account

    @EFSA_EU launched a European wide project 2 monitor health of #honeybee colonies. #EFSA4Bees We'll work together! @EPIntergroup_SD https:// twitter.com/EFSA_EU/status /790874736117084161   …
  • # Efsa4Bees
    Cengiz Taş

    Bilim adamları bir bal arısı kolonisinin sağlığını nasıl değerlendirebilir? #arısağlığı #balarısı #Efsa4Bees https:// twitter.com/EFSA_EU/status /790874736117084161   …
  • # Efsa4Bees
    EFSA Verified account

    Understanding how environmental stressors such as #ClimateChange can affect #bees #Efsa4Bees http:// bit.ly/2dFFX4D   pic.twitter.com/R582rp85e3
  • # Efsa4Bees
    www.cosasdeabejas.es

    Another step towards healthy bees | #Efsa4Bees http:// fb.me/NFblTgZ1  
  • # Efsa4Bees
    EFSA Verified account

    What are the main chemical stressors affecting #bees? Check out #Efsa4Bees blog http:// bit.ly/2dFDEil   pic.twitter.com/BbvXLF4VJp
  • # Efsa4Bees
    EFSA Verified account

    Want to know more about our work on #bees and #BeeHealth? Follow the #EFSA4bees blog http:// bit.ly/2cQriEp   pic.twitter.com/b812LnMEpL
  • # Efsa4Bees
    EFSA Verified account

    How can scientists assess the health of a #honeybee colony? Read our new blog post. #Efsa4Bees http:// bit.ly/2eMYa1i   pic.twitter.com/M3qxWuk1A6
  • # Efsa4Bees
    baRo

    RT @EFSA_EU What are the main biological stressors affecting #Bees? #Efsa4Bees infographic http:// bit.ly/2dwOCuN   pic.twitter.com/wdRsmbLOpm
  • # Efsa4Bees
    MEPs GERB/EPP - BG

    -@GabrielMariya: Хармонизацията в събирането и анализа на данни е ключова за опазване здравето на пчелите #EFSA4Bees http:// gerb-epp.info/1IU3  
  • # Efsa4Bees
    EFSA Verified account

    We also look forward to working together @GabrielMariya! Thank you & to MEPs for the positive feedback #Efsa4Bees #BeeWeek2017
Biological stressors
MORE
Chemical stressors
  • Insecticides, including pyrethroids and systemic neonicotinoids such as imidacloprid, thiamethoxam and clothianidin. Insects can be poisoned by spray, dust and through consumption of pollen and nectar.
  • Fungicides such as chlorothalonil, which is used widely in the US on peanuts, potatoes, tomatoes and other crops.
  • Antibiotics including oxytetracycline, which are used to combat diseases such as American Foulbrood.
  • Industrial pollutants can also have effects on the behaviour and health of bees. For example, manganese – a heavy metal commonly used in the production of steel and batteries – can accumulate in the nectar of plants where it is consumed by bees. One study suggests that manganese consumption has a negative impact on bees’ foraging abilities.
MORE
Environmental pressure
  • Changes in agricultural methods – particularly the prevalence of monocultures, the practice of growing genetically similar, or identical, plants over a large area, year after year – have destroyed bees’ habitats and floral diversity, thus reducing the food supply.
  • Beekeeping practices such as long-distance transporting for seasonal pollination. 
  • Climate change is also affecting the availability of food and suitable habitats. Global warming is thought to be reducing the range of some species, and extreme events and seasons may be contributing to high mortality rates in hives.
MORE

Bees in decline

About the MUST-B Project

The way that biological and chemical stressors and environmental factors interact to affect bees and contribute to population decline is still not well understood. The mechanisms are complex and the potential number of different combinations and interactions is hard to estimate. It is a scientific puzzle.

EFSA has set itself the task of trying to understand how some of the pieces of the puzzle fit together. With every new insight and connection we hope to improve our understanding the complex issue of bee decline.

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