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The Classroom
by Jerry Hayes
Please send your questions to Jerry Hayes,
17505 NW Hwy 335, Williston, FL 32696
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from the April 2007 American Bee Journal
Recently, I was able to attend and
participate in the Canadian Association of Professional
Apiculturists (CAPA), the Canadian Honey Producers (CHP) and
the Canadian Honey Council (CHC) meetings in Langley, BC,
Canada. These groups, meeting separately and together, were
some of the best beekeeping meetings that I have been
privileged to attend. Canadian beekeepers have similar pests,
predators, diseases and marketing, import, export and
perception challenges. They struggle like us with ignorance by
the public and strangely with agriculture about the value of
honey bees as honey producers and pollinators. The meetings I
attended were very well organized. CAPA is a leader in
apiculture research. The provincial apiarists are well
respected as regulatory agents and extension leaders. CHC is
reinventing itself and is working very hard to make Canadian
honey an asked-for No. 1 product. The CHP works well with its
members to increase the stability of the industry. This was a
very inclusive meeting. Nobody is left out and everyone has a
voice. Very refreshing. We in the US have no lock on honey bee
research, marketing or organization and probably can learn from
these groups. Canadians keep honey bees for the same reasons we
do. They do it, except on the West Coast, in a much harsher
environment. Siberia of North America in the interior of Canada
is not an exaggeration. In this Siberia they have learned how
to overwinter and produce queens that lead colonies to produce
200-300 pound averages of high quality, export valuable honey.
Go to www.honeycouncil.ca and see what they are doing in Canada.
Q
Toxic Honey... “Say It Ain’t So!”
Jerry, please review the
comments about bees making toxic honey. I have seen articles
about Carolina Jessamine being toxic to bees and they try to
avoid the flowers. What do you know about “toxic
honey” from Jessamine?
Michael Shreves
A
Carolina or Yellow Jessamine
can be toxic to honey bees. Many times, if the colony is
foraging on a limited number of these flowers, some may die and
the beekeeper may never even notice it. If there are large
numbers of these flowers to forage on, the noticeable and
significant colony impact may be noted. This is generally not a
big problem for us because there is no vast acreage of this
plant.
Summer Titi is another plant
that produces toxic nectar and pollen in Florida. There is more
acreage of this plant and its toxic qualities results in a
condition called purple brood. This brood is killed from the
nurse bees feeding them food produced from its nectar and
pollen. If there is surplus nectar and pollen (bee bread)
stored, the bees will continue to use this as a colony resource
and you may see more bee mortality for weeks or even months.
Moving colonies out of these areas is the only method to
respond to this problem.
Other plants that honey bees
forage on that produce a toxic nectar and or pollen are,
Mountain Laurel (Kalmia), Tansy Ragwort, Egyptian Henbane,
Rhododendrons, and some other plants in Europe and Asia that we
do not have to worry about.
Honey bees are the ones
generally affected by the toxic nectar and pollen. It is
certainly possible under the right conditions that a surplus of
honey could be stored from one of these sources. Because there
is not extensive planting of these toxic plants, the chance of
getting pure honey from these sources is slim. In fact, there
have been no reported cases of “toxic honey” in the
United States in 25 years or so that I know about.
Here are a couple of
interesting things in this talk of toxic plants. There are two
examples of toxic plant products that may be familiar to you.
The toxic phytohaemagglutinin is found in red kidney beans.
Cooking red kidney beans lowers the level of this toxin
significantly. Eating kidney beans raw or uncooked can give you
an upset stomach and if in high amounts, could kill you. Did
you know that apple seeds have a chemical in them called
amygdalin, which degrades into Hydrogen Cyanide? The apple seed
covering is so thick, and you would have to eat and chew up so
many apple seeds that this isn’t a big problem. Now you
know what took out Sleeping Beauty.
All of this said to make the
point that our world is filled with natural and man-made
toxins. Most of us are adapted to handle these in the small
amounts that nature offers. Some hypersensitive individuals are
at risk, but the general population is okay.
Q
A Less Painful
Way?
Hi Jerry, I have about 40
colonies that I started taking down to almonds. I am thinking
about growing into a bona fide sideliner, but I have always
come home from the valley with a few problems. Last year was my
first case of American foulbrood. I have read with interest
about autoclave treatment and radiation treatment to sterilize
empty colonies of harmful spores. I was thinking about using
the no medication method used in other countries to treat my
AFB colonies (shaking the colony onto completely new equipment
and destroying the infected equipment without losing the whole
colony). What about sterilization of the recently vacated hives
instead of burning? I use all medium boxes with screened
bottoms and plastic frames, so burning would cause its own set
of problems with smoke and other waste. Recent articles in the ABJ have led me
to believe that AFB spores are very plentiful in the
environment, so I was wondering about sterilization of all used
equipment before hiving new colonies. How would I locate a
radiation facility close by? How much would it cost? I should
think this would have the potential of saving the bee industry
a lot of money, while at the same time reducing the use of
mediation and improving the hive environment for our
“girls”. Thanks, I always value your answers in the
Classroom.
Boyd Taylor
Alturas, CA
A
Boyd, I wish you the very
best in your goal of growing your “bee” business.
An autoclave will not work to sterilize honeycomb because it
melts the wax under high temperature and pressure. That
won’t work. We burn colonies in Florida for the control
of AFB as it is the ultimate cure from a regulatory standpoint.
But, we are having some beekeepers use a radiation facility
that is used primarily to irradiate fruits and vegetables to
extend shelf life. It uses gamma radiation and the managers of
the facility have calculated the mass and density of a pallet
of boxes, frames and combs to apply the correct dosage. They
are charging in the range of $4.00 to $6.00 per box per pallet,
depending on quantity of pallets to sterilize this equipment.
Some beekeepers have been using this procedure even when they
do not have any identified diseases to “clean up”
their equipment from viruses, molds, fungus, even chemical
residues. I have seen bees installed on what was old black icky
comb after irradiation. It still looked old, black and icky,
but the bees just jumped on the comb and the colony exploded
and looked wonderful. And, no disease! Locating a commercial
irradiation facility in your area may be problematical and the
facility may not be ready or willing to accommodate beekeeping
equipment. This is something you will have to investigate by
checking with your state apiarist and extension office. If you
live close to a large city or university, there may be an
irradiation facility near you.
In pollination situations
with other colonies around bees will drift from colony to
colony, even if they are not right next to each other. This
drifting allows pests and diseases to be spread all around.
Because of this disease spread between and among colonies, your
colonies can still get AFB, EFB, Varroa, Tracheal mites, PMS,
Chalkbrood, and everything else. But, they will not break down
as quickly if the disease load is nonexistent in sterilized
equipment. Just remember that irradiation is no guarantee, but
it sure seems to help.
The USDA Lab in Logan Utah,
under the leadership of Dr. Rosalind James, has produced some
preliminary data that using various concentrations of ozone to
sterilize comb in a similar fashion as some vegetable crop
packers use it to lengthen storage life of their product works
well. Stay tuned on this one as it looks promising and may be
more readily available than irradiation facilities.
Q Infants and Honey, Granulation and Swarming Revisited
Three questions, please. 1. Is it
true that honey should not be fed to human infants? If so, why
not? 2. What is the change that is brought about in honey by
heating? In other words, why does honey not granulate after it
has been heated? 3. The official word seems to be that when
swarming occurs, it is the old queen that leaves the hive with
the swarm. However, I keep running into references saying that,
to the contrary, it is a new queen who takes off with the
swarm. I found an example of this most recently in the novel,
McKay’s Bees, by Thomas McMahon, a book that seems
otherwise very well grounded in bee science. So, is it an
uncontested fact that it is the old queen that leaves? Thanks
much for your entertaining and informative column in the American Bee Journal.
When each issue of the magazine arrives, it is your column that
I turn to first.
Carl Krumhardt
A
Carl,
1. Folks go down this road once every few years. (For a good
fact sheet on this subject done by the National Honey Board go
to: http://www.honey.com/downloads/infantbotulism.pdf) Years ago there
was tragic incident that involved a baby, who was constipated,
and the mother fed the baby honey as a folk remedy for
relieving this problem in the infant. Constipation in an adult
or a baby means that there is fecal material lodged in the
intestines in an anaerobic (nonoxygen) situation. Only certain
bacteria thrive in a condition lacking oxygen. Many times these
bacteria produce toxins (poisons) as their by-product of living
off the fecal material in a constipation situation. One of the
most dangerous of these organisms that lives without oxygen is Clostridium botulinum that causes botulism. The term botulism comes
from the Latin for ‘sausage’ that was the cause of
this food poisoning and potential death many years ago. The
botulism bacteria forms an almost indestructible life stage
called a spore when its food runs out or it comes in contact
with oxygen.
These spores are almost
everywhere. Most adults have developed some degree of immunity
to low levels of the botulinum spores in their environment and the bacteria
that can emerge from them under the right conditions of no
oxygen/anaerobic. These spores are everywhere, as I stated,
such as the doorknob you just touched, handshakes, pop can,
just about any surface including fruits, vegetables, etc. They
are very common in outdoor situations where food products have
been exposed to dust. Because honey is an unprocessed
agricultural product, botulinum spores can sometimes be found in it, just
as they sometimes can be found in other unpasteurized
agricultural products.
Babies, who do not have an
immunity to botulism, and who are constipated because they are
eating imperfect foods and not mother’s milk, can be in
jeopardy, not only from honey, but from any other non-baby
approved foods. Honey has never been directly implicated in
some of these cases, but there is strong anecdotal evidence
that it and other non-baby foods be restricted until
approximately one year of age. In fact, I just read of a
warning about feeding babies fermented soy products like tofu
because of the same potential problem.
2. Heat destroys many of the
enzymes honey bees add to nectar to make it honey, as well as
neutralizing some of the aromatic oils that give fresh honey
its wonderful floral scent. It can also darken the color of
your honey or even give it an off flavor if temperatures are
too high for long periods of time. However, heat also melts
minute sugar crystals that hasten the general crystal-forming
behavior of some honeys that have particular sugar ratios. That
is why many commercially sold liquid honeys have been heated to
some degree to retard crystallization and/or reduce moisture
levels in the honey. However, most pure honeys will eventually
crystallize since crystallization is the stable condition of a
super-saturated solution like honey. If crystallization of your
honey is a big problem and you do not want to heat your
product, you might want to try producing creamed (finely
crystallized) honey.
3. Nothing is ever sure in
honey bees. They are survivors and anything goes in a survival
situation. The older, original queen, stops laying, slims down
and generally leaves with the first swarm. But, and there is
always a but, if she can’t leave because of clipped or
damaged wings, many times this will not stop swarming.
Ultimately multiple virgins will be produced and a
“queen” will leave with the swarm. Life finds a
way.
Q
Very Carefully?
Just how does one mark a
queen? I hived my first swarm (and first bees) this past
spring. They’re doing fine here in the San Francisco area
-- I pulled 30 pounds of honey off of them in late summer and
they still have quite a bit left. I can see the queen when I go
through the hive, but I have to look. So, does one mark a queen
with a paintbrush with a dab of acrylic paint, or superglue on
a dot (Heaven forbid)? I am looking forward to your answer. I
read the classroom every time I get a new ABJ.
Stefani Leto
A
A marked queen is more easily
seen in a large colony. But, if you are finding her now, maybe
you are doing better than you think. Marking a queen properly
is sometimes tricky and it can result in the workers rejecting
her at times. All that said, if you still want to try this,
check out your bee supply catalog or go to the hobby section of
your local mega store and get a bottle of Testors model paint.
The queen paint markers sold by many bee supply companies are
much easier to use than a small bottle of paint. Yellow is the
color for 2007. A small paintbrush or stick to dab a bit of
paint on is needed. And, one must know that the target is the
thorax, which is the round, black structure behind the head and
in front of the abdomen. If you get the paint on her head/eyes,
you have a problem, as she is probably now blind. Or, if you
slop some paint on her abdomen/wings, you may have a problem
because the workers may “decide” she is now
defective and supersede her. Put a small but significant dab of
paint on her thorax, give it a minute or so to thoroughly dry
and then release her back into the hive. You should pull the
paint stick or brush through a small hole in the paint lid, so
that excess paint on the sides has been removed. We haven't
talked about how to pick her up or pin her down with a
queen-marking device, so I'll let you research that yourself :
).
Q
Lost As A Bee?
Jerry, enjoy your intelligent
views. What effect does Imidacloprid soil insecticide have on
bees? Is the insecticide banned in 17 countries?
HO in California
A
According to studies in
France, it affects the honey bee's short-term memory. They
leave the hive and can't remember how to get home--not a good
thing for honey bees! That is why two countries that I know of,
Italy and Spain, have banned it. Research is not conclusive,
however, on what effects, if any, this systemic soil-applied
insecticide has on honey bees that might ingest minute amounts
of it from the nectar and pollen they gather. Researchers have
theorized that Imidaclopril could be a reason for some of the
recent U.S. Colony Collapse Disorder. I wonder what it does to
humans who eat the food with it in it? Who did you say you
were? I can’t remember:).
Q
Where To Start
Hello Jerry, I am a beginner
beekeeper with a question in mind. All the discussion about
Russian bees doing well with mites and cold weather is
interesting. Would this be a good choice for starting out some
hives? Thanks for your time.
Dan Chambers
A
Dan, I think using IPM
(Integrated Pest Management) with chemically reduced beekeeping
as a goal is the way to go. Using a “hygienic”
queen is part of this multi-technique strategy. Couple this
with screened bottom boards, powdered sugar varroa control,
drone trapping and, of course, sample, sample, sample for
mites. Learning a good IPM strategy is an excellent way to
start your beekeeping experience.
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