Honeybee populations have declined worldwide in recent years
and many gardeners are coming to understand that protecting pollinator insects
– particularly honeybees but native bees as well – is increasingly
important. Three quarter of the earth’s
flowering plants rely on insects or animals to mediate pollination including
one third of the world’s crops. Many
fruit and vegetable crops rely on insect pollinators including apples,
blueberries, peaches, strawberries, cucumbers, squash, and melons.
Several factors have been identified in bee population
decline including parasites and diseases, poor nutrition, habitat loss,
pesticides and environmental stress.
While we cannot address all of these issues, gardeners should recognize
the importance of pollinator insects and can take steps to protect pollinators
in and around the garden.
Honeybees are the most well known pollinator. They are native to Europe and are often
managed for pollination in gardens and agricultural crops because they form
colonies and are excellent pollinators – often flying 2 miles or more from the
hive. Native pollinators, while less
well known, play an important role as well.
There are over 4000 species of native bees in the US. Native bees are also valuable crop
pollinators. While they do not range as
far as honeybees, native bees are very efficient and are more active in
inclement weather than honeybees. Native
bees also play an important role pollinating wild plants and sustaining native
ecosystems. The greater the diversity of
bees in an area, the better the pollination.
While research has focused more on protecting honeybees, the same steps
that protect honeybees will also protect native bees.
First, use pesticides sparingly and only as needed. Pesticides include insecticides (chemicals
used to kill insects), fungicides (chemicals used to control fungi), herbicides
(chemicals used to kill plants) and miticides (chemicals used to kill mites). While it seems apparent that insecticides are
a threat to bees, other pesticides can also be toxic to bees.
Make sure that you have plant problems accurately diagnosed
prior to applying a pesticide. Utilize
integrated pest management practices prior to resorting to chemical pest
control. Building healthy soils,
choosing the right plant for the right place, good sanitation and optimum
watering can help reduce pest problems in the garden. Handpicking, row covers and fostering
beneficial insects can help reduce pest pressures.
When insecticides must be used, consider the
formulation. Powdered formulations
generally last until the next rainfall and can gather on the bee’s body and be
carried back to the hive. For this
reason, use liquid formulations when possible.
Apply insecticides late in the day when most bee activity has diminished
for the day. Never apply insecticides to
plants with open flowers that are being actively foraged by bees and be careful
to avoid pesticide drift on to adjacent weeds or crops that are in flower. Even following appropriate measures, many
insecticides have residual toxicity that lingers for 24 hours or longer on the
plant. It is important to note that
insecticides labeled natural or organically approved can still be toxic to bees,
so make sure that you read and follow all label directions regardless of the
pesticide being used.
Provide a bee friendly landscape including diverse pollen
and nectar sources for bees at various times of the year. Include flowering plants such as tulip
poplar, sourwood, magnolia, red maple, serviceberry, various fruit trees,
asters, black-eyed susan, goldenrod, coneflowers, and monarda. Choose single flowered forms over double
flowered forms (which are harder if not impossible for pollinators to
forage). Allow some crop plants to go to
bloom – bees love the flowers of broccoli, mustard, carrots, and herbs such as
basil, cilantro, dill and mints. Leave
naturalized portions of the yard with blooming weeds such as clover, henbit and
dandelion. Include native plants to
support native bee populations. For a
full list for pollinator plants visit http://growingsmallfarms.ces.ncsu.edu/growingsmallfarms-pollinatorconservation/.
Preserve nesting habitat for native bees including ground-nesting
bees. 70% of native bees nest in the
ground. They prefer well-drained sunny
areas with sparse vegetation. Most
native bees are solitary with each female preparing her own nest. While the bees may be communal (many nesting
in the same area), their solitary nature means that they are not
aggressive. Preserve their nesting areas
by not disturbing them. Other natives
nest in wood or hollow stems. Where
safe, leave dead trees standing.
Alternatively, create bee blocks by drilling holes in a wooden block or
bundling hollow stems or straw together and place them in a location receiving
morning sun about 4 feet above the ground.
Honeybees swarm in the spring and summer as a way to manage
the hive. If you find a honeybee swarm
near your home, contact a local beekeeper. Many beekeepers welcome a chance to collect a
swarm to start a new colony. If you are
interested in learning more about beekeeping, join your local beekeeping
association. In Onslow County, the
Onslow County Beekeepers meet on the second Tuesday of the month at 7 pm at the
Onslow County Multipurpose Building at 4024 Richlands Highway. Between meetings, call the Extension Office
at 910.455.5873 for current contact information or to report a honeybee
swarm.
For more information about pollinators of all sorts:
http://pollinator.org/PDFs/Guides/OuterCoastalrx7FINAL.pdf
Are you interested in beekeeping? Do you want to learn more? If so, the Onslow County Beekeepers are
offering a spring Beekeeping Short Course.
This three-day class includes comprehensive training and an end of
course test. The class will be held at
the Onslow County Cooperative Extension Office on February 28, March 7 and
March 14 from 8 am until noon each day.
Contact the Onslow County Beekeepers for more
information and to register: Eric
Talley, President, at 910.389.7709 or via email at erictalley@ec.rr.com. Cost is $30 per person or
$40 for a couple that shares a book.
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