Hive poisoning occurs in urban environments, but probably even more in the rural areas where crops are routinely sprayed on a calendar basis. In other words, the spraying is not in response to a assessment showing a pest or problem, but on a schedule. Poisoning happens in the city because homeowners do not read labels carefully and the labels hide the information about toxicity to bees in small print deeply embedded in the directions. By now, just about everyone has been made aware, by media coverage, of the crisis in losses of commercial honey bee colonies. But, people are still buying a LOT of toxic chemical answers to their perceived "bug" problems and spraying a shrub, tree or flower bed with these chemicals during visitations by honey bees and this can cause a huge amount of death.
It is in the nature of bee foragers to tell their sisters of strong sources of nectar and pollen so that a source may be exploited with efficiency. If the plants have been sprayed, the bees will ALL be collecting poisoned nectar and pollen and taking it back to the hive to off-load to the house bees---which poisons those bees, as well.
It is a devastating experience. I have had a nuc, full to the brim and ready to sell, be stricken by poisoning till the colony population fell to about 200 bees and the queen. I boosted them with frames of capped brood and they recovered in 2 months.
All my 28 colonies are feral survivor stock. They start working early and are still coming back after dark. One tall stack, kept at my house, has actually had TWO incidents of pesticide poisoning—July of 2014 and December of 2015. Both times, the pool of dead bees out front, the dead on the bottom board, the bees dropping off the frames and flipping around on the ground were the cardinal signs of acute poisoning. All signs became clear over the course of a day, but the initial recovery—the continued acute dying—took about 10 days to run its course. I do not think this colony would have survived but for their bulk size—3 deeps—contributed to a larger population to absorb and dilute the poisoning. The queen was not poisoned either time, and I attribute that to the fact that bees handing off any food to the queen are not the usual bees receiving nectar as it comes in.
In most cases of poisoning, the situation can't be fixed, so much as, it has to run its course. I do not re-queen bee hives, so the main thing is to reduce their hive space appropriately to the number of bees left after the incident concludes. You may have to remove entire hive bodies and save back those combs. (I put those in the freezer for three days to kill any hiding hive moth eggs before I store them in a air tight crate)
If the hive was not very large to begin with, such as a nuc, adding in frames of capped brood with nurse bees (not open brood or eggs---you want the surviving bees to have to do the least work possible) can help them come back up faster.
What can you do about this awful disaster? The first time it happened to me, I had no resources to direct me, but by the second time it happened, I had been learning about the Pollinator Stewardship Council and their "super-advocate", Michele Colopy. She is intensely involved in all types of research and monitoring of pollinator protection and the often-times poor oversight by our government agencies in policing chemical applicators and users and manufacturers. She has a newsletter which I highly recommend you subscribe to. Beekeepers should join this organization that is working for us to affect regulatory processes of pesticide risk assessment, labeling, and enforcement.
And if you find a colony you are keeping that you suspect was poisoned, I strongly urge you to make use of Michele Colopy at the Pollinator Stewardship Council in her effort to collect and report poisoning incidents to the government agencies. All you have to do is submit some photos of the carnage, a description of what happened. Michele does all of it for you---the filing of the official reports to the Dept of Pesticide Regulation in your state and the report to the Environmental Protection Agency. If we do not make the effort to report these bee kills, it is the common tendency of the agencies to say “nothing is happening”
This kind of attitude does not help our cause to rein in pesticide usage.
Here is the note she sent me after I wrote her of my hive’s second poisoning----
Dear Ms. Rudnicki,
The Pollinator Stewardship Council has been encouraging beekeepers to report their bee kills (not winter losses, that is BIP’s work) since 2013
http://pollinatorstewardship.org/?page_id=934 . We worked with the Honey Bee Health Coalition in May 2015 to create a guide on how to report bee kills due to pesticides. The attached article was printed in Bee Culture magazine, and the attached Quick Guide PDF was there as well. Beekeepers can request a laminated copy of the Quick Guide at
http://pollinatorstewardship.org/?page_id=3292
Thank you for your due diligence in reporting your losses. It is only through awareness and data collection that we all can gain a better understanding of all of the factors (pests, pathogens, pesticides, and poor forage) affecting our honey bees whether it is 2 hives or 2000 colonies damaged or killed.
Even though EPA has stated they do not like to accept “second-hand” reports, such as from the Pollinator Stewardship Council; EPA doesaccept “second-hand” reports of pesticide incidents that were reported to pesticide manufacturers. When you and I spoke about your bee losses, I simply wrote down what you told me; you reviewed and approved the report, and gave me your permission to email the reports to CDPR and to EPA with your name and contact information in the report. (beekeepers can report their losses anonymously, and we will respect a beekeeper’s privacy to do so.) The Pollinator Stewardship Council is here to assist beekeepers in the reporting process. Our goal is to listen to beekeepers, explain the reporting process, and help them document their losses.
At this time the Pollinator Stewardship Council is part of a committee, along with other concerned nonprofits, working with EPA to revamp their incident reporting data collection.
Through more than 50 presentations around the U.S. the Pollinator Stewardship Council has provided information about reporting bee kills due to pesticide exposure, and encouraged beekeepers to report their losses. We need all beekeepers to report their losses (winter losses to Bee Informed Partnership as that data collection is important), and losses as a result of pesticide poisoning to the Pollinator Stewardship Council, EPA, and the beekeeper’s state EPA as this data is just as important in helping to improve the health of our bees. See reported losses athttp://pollinatorstewardship.org/?page_id=1428
I am very sorry for the losses you have experienced. Thank you for taking the time to report this incident. Please feel free to share this information with your beekeeping network.