Controlling Honeybees Around The Home
ANR-179,
Revised Oct 1997. Revised
by James Tew, Beekeeping Consultant for Auburn University, Associate
Professor, Entomology, Ohio State University.
Controlling Honey Bees Around
The Home
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Introduction
Though there are many kinds of insect pests
in the world, the honey bee is uniquely beneficial to human welfare.
Not only does it produce honey and wax, but more importantly,
the honey bee pollinates many crops that we depend on for food.
The three major groups of crops that require or benefit from insect
pollination are fruits, vegetables, and certain seed crops. About
one third of our total diet comes directly or indirectly from
insect-pollinated plants. Of the insects that pollinate crops
for humans, the honey bee is the most important.
Honey bees, therefore, should not be killed
except when absolutely necessary. Because of their defensive stings,
however, honey bees may not always be welcome in homes.
Honey Bee Identification
The honey bee is about 2/3 inch long, with
yellow and black or brown bands across the abdomen. The body is
covered with hairs. Because the honey bee is similar in appearance
to some wasps, it is often blamed for stings by social wasps such
as yellow jackets, paper wasps, and hornets. One difference is
that wasps can sting repeatedly, while the honey bee stings only
once and leaves its stinger at the site of the sting. The honey
bee is not aggressive, and stings only for self-protection. Worker,
queen, and drone bees are illustrated in Figure 1.
Figure 1. From right to left, worker, queen,
and drone bees.
The honey bee is the only stinging insect
that can establish a permanent nest in a house or hollow
tree. Honey bee colonies are large, numbering from 15,000 to 60,000
bees.
Control Of Bees In Swarms
In spring and early summer, a honey bee
colony may divide itself by swarming. This is the natural way
honey bees increase their colony numbers. About half of the worker
bees and their old queen will leave their nest to begin a new
colony. A swarm will cluster temporarily on a tree branch or other
object for a few hours or for several days, and then enter the
wall of a building, a hollow tree, or some other cavity, to establish
a new nest.
Swarms are not usually a problem unless
disturbed. It is often best to leave a swarm alone and let it
depart on its own. If it is in a place where the bees present
a danger to humans or animals, call your county Extension agent,
police department, or fire department for names of local beekeepers,
who may want more bees and be willing to remove the swarm for
you. If no one will agree to remove it, the best alternative is
to call a commercial pest control operator.
Bees In Buildings
It is best to take action as soon as possible
after bees enter a building. The colony quickly begins to build
combs of wax in which to rear young bees and store honey. In a
fairly short time there will be a considerable amount of wax and
honey, and a large number of bees in the colony. This means that
it is usually preferable either to trap the bees out or to open
the wall and remove the entire colony, alive or dead. If the bees
are killed in the wall, they may cause a disagreeable odor for
some time. Honey may seep out through the walls, causing a serious
problem.
If you are able to remove the entire colony,
paint over the nest area, fill the nest cavity with insulation,
then seal and paint all entrance holes. Otherwise, another swarm
may smell the old nest and move in.
Control measures are usually more effective
in the late winter or early spring when honey stores and colony
population are at their lowest levels. Keep in mind that the combs
that bees live in may be some distance from the entrance hole
through which they enter and leave the nest. This means that an
insecticide applied at the entrance may not make contact with
the nest at all, and can complicate the procedure of opening the
wall to remove the colony.
You can often locate a nest by tapping
on the outside or inside wall at night and listening for the buzzing
of the bees. Since bees keep the brood area of the nest at about
95 F, you may also be able to feel the warmth of the nest through
an inside wall.
Removing Bees Alive From A Building
The entire colony can be removed either
through opening the wall of the building or by trapping the bees.
Caution! To work with live bees, you will need protective clothing--a
bee veil, gloves, long sleeves, long pants tucked into boots,
and a bee smoker. It's best to have an experienced beekeeper perform
the task.
If you can, remove the siding and cut out
all combs. Place the good combs containing brood and honey into
frames placed in a hive positioned at about the same location
as the main flight hole. Scoop, brush, or use a modified vacuum,
to move all clusters of bees into the hive. Most of the bees that
fly will enter the hive. During the next day, move the hive at
least 2 miles away. Kill any remaining bees with an insecticide.
Paint over the nest area, fill the nest cavity with insulation,
replace the siding, and close and paint all openings.
If it is not practical or desirable to
remove the siding, bees can be trapped. This procedure requires
at least 30 days and may not always be successful.
1. Make sure there is only one hole that
allows bees to enter or leave the building.
2. Using window screen wire, make a funnel
or cone about 18 inches long. The big end of the funnel should
be large enough to cover the flight hole and taper off to the
little end with an opening 3/8 inch in diameter.
3. Secure the large end of the funnel
bee-tight over the flight hole.
4. Attach a temporary scaffold to the
side of the building to support a hive containing one or two
frames of unsealed brood, bees and honey, and several frames
of empty combs.
5. Place the hive so that the hive entrance
is near and at a right angle to the little end of the wire funnel.
When the bees return, they will attempt to enter at the big end
of the wire funnel which covers the flight hole. Eventually,
they will give up on reentering the old nest, and most will go
to the hive.
6. Check the area frequently for alternate
entrances that the bees might have made in response to the screened
entrance. Figure 2 shows several arrangements for trapping bees
from buildings or from trees.
Figure 2. Arrangements for using a wire
screen cone to trap bees from buildings or trees into a hive.
(Courtesy of A.I. Root Co., The ABC and XYZ of Bee Culture,
1966.)
7. Leave the hive in place for at least
1 month so that most of the bees that are developing in the nest
will complete development and leave the nest.
8. In about 6 weeks, if no new holes have
been discovered, most of the bees from the old nest will be in
the hive. Remove the screen wire funnel. Put about 1 tablespoon
of powdered sulfur in a lighted bee smoker and puff the fumes
into the original flight hole. The sulfur fumes will kill any
bees remaining in the old nest if the fumes reach them. Or, you
may let the bees die a natural death. Caution! Sulfur
fumes may cause some cloth and metals to tarnish. Be careful!
Don't set the building on fire!
9. The next day, smear a little honey
around and in the original flight hole to encourage the bees
from the hive to rob out the honey in the old nest and store
it in the hive.
10. Wait about 2 weeks or until the robbing
has stopped and seal up the original flight hole.
11. Wait until night when all the bees
are in the hive and move it 2 miles away to a permanent location.
Using An Insecticide
Insecticides are the safest and most satisfactory
materials for killing bees in buildings. Do not use fumigants
or other poisonous or flammable compounds.Use an insecticide in
the form of a dust or aerosol instead of spray because the dust
or aerosol will circulate in the wall cavity better than a spray.
A spray may be used if it can be applied directly to the bees.
However, a spray may damage interior walls, ceilings, and furnishings
if applied improperly.
Effective insecticides formulated as dust
include 5% carbaryl (Sevin), 5% malathion. An effective insecticide
formulated as an aerosol is 1% resmethrin (Whitmire Prescription
Treatment 110 Aerosol Generator). Follow directions on the insecticide
container label.
Apply the insecticide at night when all
the bees are in the nest. Close all holes except the one through
which the insecticide will be applied to the nest. Make sure none
of the bees can gain access to occupied rooms. Apply the insecticide
through the flight hole if the nest is fairly close to it. Otherwise,
drill a suitable hole through the wall just above the nest, preferably
from the outside, so that the insecticide may be directed onto
the nest.
In most cases, one application to the nest
will be sufficient. However, if the colony is very large or the
nest very extensive, it may be necessary to treat a second time
in 7 to 10 days. Check the main flight hole 7 days after treatment.
If there are no bees flying from the hole and there is no buzzing
when the wall is tapped sharply, it is probably safe to assume
the bees are dead. When the nest location is exposed in the attic,
the insecticide may be applied in the attic. Do not allow the
bees to escape into occupied rooms.
Another technique that works in some situations
is to put the insecticide dust in a heavy-duty brown paper bag.
Place the paper bag inside a plastic bag. In the evening after
all bees have entered the nest, tack the open edge of the sack
tight around and over the bees' flight hole. Make a 3/8-inch flight
hole through the upper corner of the bottom of both bags. The
colony will gradually be killed as the bees carry poison dust
to the nest on the hairs of their bodies.
A colony located in a chimney may also
be killed with an insecticide. Fit a piece of cardboard or other
suitable material over the fireplace so the bees and insecticide
cannot escape into the house. If the nest is located near the
top of the chimney or in the fireplace, conventional equipment
may be used to apply the insecticide; otherwise, special equipment
will be required to ensure that the insecticide reaches the nest.
Don't try to burn honey bees out of a chimney. A serious fire
could be started because the wax will burn almost like oil. Kill
the bees first, then cut or knock known the combs with a weight
attached to a wire or rope.
Caution!
The dead bees and the insecticide treated honeycomb are attractive
to other honey bees and are toxic to both bees and people. Dig
a hole and bury dead bees and all of the comb under at least 18
inches of soil. Do not leave the honey and comb where other bees
can reach it, or you may damage valuable honey bee colonies nearby.
The procedures and techniques are essentially
the same for controlling bees in hollow trees in yards or recreation
areas as in buildings.
The pesticide rates in this publication are
recommended only if they are registered with the Environmental
Protection Agency and the Alabama Department of Agriculture and
Industries. If a registration is changed or canceled, the rate
listed here is no longer recommended. Before you apply any pesticide,
check with your county Extension agent for the latest information.
Trade names are used only to give specific
information. The Alabama Cooperative Extension System does not
endorse or guarantee any product and does not recommend one product
instead of another that might be similar.
For more information, contact your county Extension office. Visit http://www.aces.edu/counties or look in your telephone directory under your county's name to find contact information.
Issued in furtherance of Cooperative Extension work in agriculture and
home economics, Acts of May 8 and June 30, 1914, and other related
acts, in cooperation with the U.S. Department of Agriculture. The Alabama
Cooperative Extension System (Alabama A&M University and Auburn
University) offers educational programs, materials, and equal
opportunity employment to all people without regard to race, color,
national origin, religion, sex, age, veteran status, or disability.
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