Results 1 to 3 of 3
  1. #1
    Join Date
    Nov 2014
    Location
    Portugal
    Posts
    896

    Default residues above the LMR on the honey

    I have dealt with Apivar , Apistan and the first time I am using Bayvarol . I have looked extensively on the net if scientific documents that refer to honey, coming from hives where they are applied these miticides and according to the protocol defined by their manufacturers, has residues of these treatments with values ​​above the MRL established by law. So far I have not found any .

    However as I read so often that honey is contaminated by these residues I hypothesize that my research is incorrect given that English is not my mother tongue .

    I ask those who have English as a mother tongue (most of us ) that relate the scientific sources that support the affirmation that deal with Apivar , Apistan or Bayvarol according to the protocols of the manufacturers causes irreversible damage to the quality of the honey (residues above the legal MRL) making improper for the consumer.

    My thanks in advance.
    "We are two abysses - a well staring the sky." Fernando Pessoa

  2. #2
    Join Date
    Feb 2006
    Location
    Herrick, SD USA
    Posts
    5,995

    Default Re: residues above the LMR on the honey

    Most major honey packers in the US are testing for beekeeper applied miticide residues in honey. I don't know the levels at which each packer might reject a load but I can tell you that our honey has never had a positive reading for any of these residues at a level (I think) of 5ppb.
    "People will generally accept facts as truth only if the facts agree with what they already believe."- Andy Rooney

  3. #3
    Join Date
    Nov 2014
    Location
    Portugal
    Posts
    896

    Default Re: residues above the LMR on the honey

    Thank you Jim Lyon for your feedback.

    I transcribe below a set of general coments made ​​by us beekeepers and the outcome made by the Committee for Medicinal Products for Veterinary Use (CVMP ) to these comments .

    General comment:
    "The vast majority of beekeepers provide beeswax-foundation for their bees based on recycled beeswax from old comb. Some hydrophobic veterinary medicinal products or their metabolites may contaminate the beeswax and lead to increasing levels by repeated recycles of beeswax from treated colonies. The accumulation is dependent on the stability of the compounds to the heat-treatment in the wax melting
    process.
    The concentrations of such VMP's or their metabolites in the beeswax may approach toxic levels or levels where contamination of the honey is likely to occur. Furthermore may constant presence of the VMP in the hive accelerate the development of resistant varroa mites against such VMP's.
    In this way the long term efficacy and the target animal safety of the VMP may be compromised. We therefore suggest that the guideline should include studies to evaluate VMP's for such adverse properties. Problems with accumulation of VMP's in recycled beeswax
    were discussed at the EMA Workshop on medicines for bees, 14-15 December 2009 in London (EMA/28057/2010).
    Studies on accumulation in wax (without recycling) have been requested by the CVMP for the summary report on
    Amitraz (EMEA/MRL/572/99 and EMEA/MRL/187/97)."

    Outcome:

    Indeed, some acaricides can lead to residues in honey. Honey always contains wax. Both water soluble and organic solvent soluble substances may end-up in honey. In relation to the potential contamination of honey with residues transferred from wax it should be noted that the MRL set for honey does not distinguish between residues incurred as a result of treatment and residues incurred as a result of transfer from wax. In addition, it is acknowledged that wax particlesmay be present in honey. For substances for which MRLs in honey have been established, compliance with the MRL therefore continues to ensure consumer safety.

    It is accepted however, that for a number of substances the CVMP has concluded that there is not a need to set an MRL in honey. These substances are not considered to represent a consumer safety concern because either their toxicity is low and consequently exposure, even at high levels, will not represent a risk for the consumer, or because it is accepted that their concentration in honey will always remain low (for example because they are non-lipophilic and non-accumulating). The transfer of residues of substances of this type from beeswax to honey is therefore also concluded not to represent a consumer safety concern.
    It should also be noted that data exists to show that the residue values in honey from contaminated honeycombs are about 1700 times lower than the residue concentrations in honeycomb wax1.
    Also, for transfer of residues of a variety of varroacides from beeswax to honey, the level of residues in the wax needs to be at 2 digit ppm levels (10-60 mg/kg) for concentrations in honey to appear at 0.6 to 36 μg/kg levels. It is therefore considered that the potential
    for transfer of residues from wax to honey is limited and does not represent a consumer safety concern.

    With respect to bees wax, it is common practice to recycle it. In this way residues may persist in wax over the years. The problem is not new and it is related to substances that are not water-soluble. As recycling is usually done by heating, the residue level of a substance may
    be reduced (by evaporation).
    There is no scientific information which indicates a risk of acaricide residues in bees wax, and no toxic effects in bees and/or resistance-induction in Varroa mites have been identified,
    Rather than being related to residues in wax, such possible adverse effects seem to be related to inappropriate use of acaricides. Those levels that have been observed are usually too low to induce such effects. So the likelihood of residues, building-up to levels that are toxic for bees (brood) and/or select for resistance in mites is considered low.
    Moreover, bees and mites do not come into contact with wax in a way that it may lead to the aforementioned effects.
    Although it is possible to study the persistence of substances in wax in relation to recycling, the likelihood of finding toxic effects on bees and/or reduction of susceptibility in mites, due to residues in bees wax, is considered very low, taking into account all adverse effects that can affect bee colonies.
    Therefore no recommendation on studies addressing effects of residues in bees wax in relation to bee toxicity and/or induction of resistance in Varroa-mites is made.
    Long term studies on bees are limited in the kind of information they can provide on the risk due to wax residues. Furthermore, it may not be appropriate to ask for such studies in bees being MUMS species and experience has shown that even long term studies would not be appropriate to identify such effects.

    Good beekeeping practices as well as appropriate use of acaricides is a major issue in reducing the presence of residues in bees wax."

    source: Overview of comments received on 'Guideline on veterinary medicinal products controlling varroa destructor parasitosis in bees'
    (EMEA/CVMP/EWP/459883/2008-CONSULTATION)
    "We are two abysses - a well staring the sky." Fernando Pessoa

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Ads