Remarks for Changes to CCD --- Colony Collapse Disorder--- 23-3-2007
Well the biosafety homepage of the study of "effects of Bt pollen on honeybees" is an official one: from the german government. Then, "a researcher in germany"...I do not think you want to be quoted with "a researcher in the US". And picking out from an article what seems to fit in the actual own theory does not fit either. So I just wrote some additional information to the quotations, But I do not want to give the article an Anti-GMO-bias on the one side, and on the other hand I do not want to neglect GMOs and their potentials. The German findings concerning "nosema" bees, had really been strongly discussed in Europe (see last story in the: DER SPIEGEL Are GM Crops Killing Bees?). Well a question: are healthy bees those you feed antibiotics? Concerning the quotation of David Hackenberg: A PA Beekeeping Association has sent me a letter of D. Hackenberg. If you want, I will send it to you. And for sure he really is in the bee bussines.
The Letter Of David Hackenberg:
Dear Grower,
I have been receiving calls because of the stories in the media about what is now being called “Colony Collapse Disorder”.
I will try to explain as well as I can what is going on in the Bee Industry. First it seems that ever since we discovered Varroa mites in this country in 1987 there has been one crisis after another for our industry. I am sure many of you are to the point where you do not want to hear any more about these troubles that our bee industry seems to be mired in. Well I can tell you that it has not been pleasant being on the inside of each one of these almost continued crises. I wish I could take a few years off from the problems and honestly tell everyone “life is good” in the bee business but that is not the case.
Colony collapse Disorder (CCD) may be one of the most serious problems the bee industry ever faced. I have many beekeeping friends who have lost 50 to 95% of their hives since November. I have had reports of disaster in California where over one million hives are now pollinating the almonds. Beehives that were full of what appeared to be healthy bees in early January are now empty boxes with a few sick and dying bees left in them. A Texas beekeeper with 10,000 hive outfit that has less then 1,000 hives left. A package bee and a queen bee producer in Georgia that supplies beekeepers in the north in the spring with replacements cancelled all his orders this past Monday. There is speculation that maybe 150,000 or more hives may have already died nation wide, but this is only a guess since numbers are impossible to estimate while hives are still collapsing.
Unfortunately I was the first to discover CCD in one of my locations just south of Tampa, Florida in November 2006. In October I brought several loads of bees to Florida from Pennsylvania and New York and they appeared to be strong healthy hives when I unloaded them but by mid November several of my larger yards had less then 10% of the hives still alive. I contacted people at Penn State and the Pennsylvania Department of Agriculture and USDA. They requested that I bring those hives that were still living but appeared to be collapsing as well as dead bee hives to analyze in their labs. The initial findings were very puzzling. Dead bees showed signs of fungus, amoebas, and undigested pollen in their mid-gut (this can be viewed on website MAAREC.org, look up CCD). There was no record in bee research literature on this kind of pathogen levels that were present in these bees. At the same time this was happening in Florida, reports from several other states were beginning to come in at larger than normal beehive losses. By mid January at the American Beekeeping Federation convention in Austin, Texas a large number of dead (disappearing) hives were reported in 22 states. Two weeks ago researchers from all over the country met in Stuart, Florida to discuss CCD. I and 10 other beekeepers from across the US were there.
This has been a very difficult problem to figure out what is happening to the bees????? At first many of us thought we were seeing something related to varroa mite or maybe a new virus spread by mites. But the symptoms of CCD were very different from any mite damage we have seen in the past. There are four particular things about CCD that were perplexing but some what consistent across the country. First, some people referred to this as “disappearing disease” because the bees literally disappeared. The second symptom is that bees left behind frames of brood (young baby bees) and boxes filled with honey that no other bees came in and robbed out as normally happens. The third symptom was that the small hive beetle and wax moth would not move into the hive for at least 3 weeks as if something toxic was in the hive. One problem that beekeepers experienced early is that it is a common practice to place dead bee hive boxes on top of a live hive nearby to fill them with bees again. When you place a dead CCD hive on top of a live hive nearby you kill the hive below. This makes us think that there must be something toxic in the hive from CCD. But when aired out for several weeks the toxicity levels seem to go away. The last symptom is that the dead bees always seem to have a fungus found in the bee’s mid-gut and sometimes through their entire body.
So the big question (problem) is what is killing the bees???? According to one spokes person from the CCD working group of researchers, extension people, university officials and industry leaders, preliminary work has identified several likely factors that could be causing or contributing to CCD. Among them are mites associated diseases and viruses, some unknown pathogenic disease and pesticide contamination or poisoning. I have been in CCD group discussions from the beginning. I have had detailed talks with affected beekeepers, researchers, bee inspectors, growers, farmers, seed company representatives and anybody that might be able to contribute any useful information. The picture that has emerged so far has many people in this industry extremely concerned.
Environmental contaminants are a research priority. Neonicotinoids are a relatively new class of pesticides that are being wildly used and we know that they can be toxic to bees and for these reasons it makes sense that they are one of the group of pesticides being looked at.
Even though the problem is wide spread across the USA not all beekeepers have been affected yet. That is a key piece of information in solving the puzzle.
Beekeepers that have been most affected so far have been close to corn, cotton, soybeans, canola, sunflowers, apples, vine crops and pumpkins. So what is it about these crops that are killing the bees?? In the last three years what changed about the growing practices that would have this affect. Initially beekeepers discounted the possibility of pesticide damage because there is no sign of dead or dying bees when bees are working around these plants. Also in the past it was accepted that soybeans and cotton were good crops to produce honey and corn was an excellent source of pollen when in tassel and pollinating apples, vine crops and pumpkins other than causing stress and queen loss from moving bees so many times was acceptable. Bees were not dying in the summer while these crops are blooming but rather several months later in the late fall and early winter. During the fall and winter of 2004 and 2005 there were similar die-offs in mid-western states. This year the die-off has spread more across the country and there are much larger losses.
In conversation with farmers, growers and seed and spray company representatives we have learned that there has been a big change in pesticides used to treat these crops.
We are simple beekeepers not entomologists, chemists or biologists, but we are now taking a crash course in insect and pesticide interactions. Before November I knew very little about neonicotinoids. In the past three months I have come to know more than I want to know about this newer type of pesticide. From what I have learned so far, I am convinced that neonicotinoids may play a role in CCD and exposure to these materials is something that is under our control.
From research on the internet I have learned that neonicotinoids are systemic insecticides used to control sucking insects on plants, everything from corn, tree crops, most vegetables, cranberries, blueberries, strawberries, cotton, canola, ornamentals, forestry and turf.
I think that the reason neonicotinoids may be so damaging to honeybees is that they are found in fairly low “sublethal” levels in the pollen and nectar of the plants. The field bees often do not die when working on plants treated with these products. Instead they may bring the pollen and nectar back to the hive and store it in their comb to use later. It is usually several months later when natural sources of pollen and nectar slow down in the field that the bees would use this store of pollen and nectar to raise brood that the symptoms appear. The young bees raised on this food may exhibit memory loss and impaired immune response. What may finally kill the hive are two things: first, the loss of most of their adult bees because when “sick” bees leave the hive to collect food they do not return (disappearing disease) and second, the remaining young bees in the hive may have such a weakened immune system that normal pathogens found in the hive such as fungus easily overwhelm them. The result is a dead hive loaded with pathogens in the dead and dying brood left behind. Of course, these symptoms appear several months after exposure to neonicotinoids and up until recently the cause of effect appeared unrelated.
Much sampling and testing is being done on dead and dying bee hives in different parts of the country.
Even though I have lost over 2,000 of 2,950 hives of bees here in Florida in October, I feel fortunate when I talk to beekeepers across the country that has had 80-95% losses. We have been busy since November feeding and working with bees to build these hives into large hives to make new hives of bees as well as we have brought bees in from Australia to restock about 400 hives at a great cost.
I am very concerned in the coming season about minimizing my beehive exposure to whatever is killing the bees. I am hopeful that there are things that we can do to help keep our bees as healthy as possible.
Even though we may “think” we know something about what is killing the bees. There is very little that will be done by regulatory agencies in short term to help us. We need the cooperation of our pollination customers for this. That is something individual growers can help with. I have already got word from my largest customer, Jasper Wyman and Sons Blueberry Co. that they will not use these products on blueberries and I wish to thank them for taking the lead. I am asking you as a grower to take a look at what you have used last year and what you might be using this year. If at all possible, please try to use something beside these products. I have attached a list of neonicotinoids products and their brand name.
If you as a grower feel you must use these products, please speak to me before honeybees are placed in your crops. We as beekeepers must do everything we can to minimize our exposure. We also need help from growers to speak up about the importants of honeybees for the pollination of your crops to your elected officials in Washington, D.C. The bee industry leaders have been working very hard to get more money for bee research in the country. The new “Farm Bill” is currently being developed in congressional committees. We are trying to get increased funding for USDA and University Bee Labs around the country. There are so many factors contributing to honeybee health and disease that we know very little about. We need to accelerate the learning curve dramatically to figure out how to keep the bees alive. Political support from growers will be crucial to fund some of this research so we can hopefully have a good supply of healthy bees for your pollination needs. I am sorry this is so lengthy but I feel it is important for you to know this information. We will have honeybees available for you for the 2007 pollination season. Prices will be somewhat higher because of these new problems. You may contact me or I will contact you before the pollination season about your pollination needs. As always, any comments, questions or suggestions you have about any of the information I have presented would be more than welcome. Feel free to call me at 813-713-1239 or 352-583-2796. After April 20th call 813-713-1239 or 570-568-2337 or e-mail at [email protected].
Thanks.
David Hackenberg
HACKENBERG APIARIES
1466 Crossroads Dr.
Lewisburg, PA 178237