The practice of using bees to pollinate fruit
crops is as new as the beekeeping industry in most parts of tropical Africa,
although the practice has started in a few places in northern and southern
Africa. This short chapter describes how farmers could utilize it to great
advantage.
From flowers, the honeybees collect large
quantities of nectar for the production of honey to feed themselves and pollen
for feeding their young. In the collection process, the insect pollinates thousands
of different kinds of plants, including edible and cash crops.
Many parts of the world are blessed with
similar variety and nutritive quality in their available food supply. If less
fortunate parts of the world are to improve their diets to include more meat,
dairy products, fruits, and vegetables, there will be a need for great world-wide
increases not only in bee-pollinated crops but also in bees and beekeepers to
carry on the pollination and particularly an increase in knowledge and
understanding of what a potent force in food production and human nutrition the
honeybee activity is
In the USA & Africa, many crops depend on the
wind for their pollination, including cereals: millet, guinea corn, maize and
rice. Plantain, cocoyam, and yam also do not need insects to pollinate them. But
most leguminous vegetables; cash crops such as coffee, cola nut, cocoa,
coconut, palm, cashew and shea butter; fruits such as the mango and citrus; and
many other plants cannot be pollinated without insects.
The insect forages for nectar and pollen from
several thousands of plant species and in the process pollinate a wide variety
of crops important for the survival of life. While bees may visit many species
of plants in a day, a forager may also constantly visit one plant, sometimes
for several days, until there is no more nectar or pollen to collect.
Pollen is a vital food for the brood of the
honeybee. The bee needs it in the hive, but the flower also needs the bee to
fertilize it. The bright color and sweet odor of the flower combine to attract
insects. The honeybee, which has a powerful sense of smell and a keen sense of
sight, is easily attracted to the flower. In the process of gathering both
nectar and pollen, it incidentally transfers some pollen from the flower\'s male
organs, the anthers, to its female organ, the stigma. The
pollen germinates and penetrates to the plant\'s ovaries, where the
seeds are formed.
The honeybee starts its foraging activity
between 5:00 and 5:15 a.m. Flight usually depends on the weather and temperature.
The honeybee will not leave the hive if the temperature is below 14°C or if the
wind speed is above 30 kilometers per hour. To be effective, therefore,
pollination should take place in warm, clear weather, but too much heat has the
same adverse effect as too much cold. If the weather is hot, dry and windy, the
flower\'s stigma may dry out, so that pollen deposited does not germinate.
Pollen may also not be available in conditions of continuous rainfall, since
flowers are usually scarce during the rainy season. Thus, areas of frequent
rainfall offer few flowers for bee activity.
The honeybee is the only insect that can
successfully be moved from farm to farm. It is estimated that five average
colonies (about 50 000 bees each) can work a two-hectare plantation. This is
achieved by moving colonies and siting them close to the farm.
How to
move bees
The beekeeper must study carefully the
temperament of his bees, and keep a record of the seasons when they are
friendly or aggressive in his locality, because during certain periods of the
year, bees can be transported easily without precautionary measures against
aggression and stinging.
A motorized lorry is an indispensable tool
for the professional beekeeper. Bees cannot be moved by head-load. The top-bar
hive cannot be transported over long distances on poor roads or tracks, and
therefore hives that are to be transported frequently must be fitted with
movable frames. The hives should have a ventilation hole about two centimeters
in diameter, covered with mosquito mesh. Their bottom board should be coated
with termite-repellent paint.
The hives should be light enough to be loaded
and unloaded easily. Combs with capped honey should be removed to reduce
weight, while uncapped combs should be retained in the hive. Before loading,
hives should be inspected and all unwanted openings sealed with wood and wax since they can create problems if the bees come through them and cluster
outside the hive. However, bees tend to cluster quietly in moving vehicles and
rarely attempt to fly away or cause any harm until movement stops.
In general, bees are less troublesome riding
at night. Hives should be loaded in the evening when most of the bees have
returned from foraging. The bees clustered at the entrance are smoked to drive
them into the hive. The entrance is then sealed, and the ventilation hole is
opened to allow air to circulate through the hive. Hives can be stacked one
above another. They should be packed closely and neatly, and secured with a tracer’s
rope. The journey and the reinstallation of the hives should take place at
night: hives should be unloaded and installed before sunrise because the bees
will be ready to leave shortly after that time. To assist in the night work, a
flashlight with a red bulb, or covered with red cellophane, is a useful tool,
because bees cannot detect red light and are therefore not disturbed by it.
Pollination Programs
Fruit-growers should be encouraged to keep
their own bees to ensure that their crops are properly pollinated. Growers who
for any reason do not wish to keep bees should be advised to use the services
of a beekeeper who has colonies to move about for the purpose.
In order for a pollination program to work
successfully, it is important that the farmer and the beekeeper work in close
collaboration, because both have an essential role to play. yell before he
needs the bees (where bees are scarce, several months\' notice may be
necessary), the farmer should contact the beekeeper to make detailed
arrangements. At this time they should agree on a number of points, and it is
often advisable for the agreement to be written down in a simple contract.
Among the things they should agree on, these are possibly the most important:
1. The number and the strength of the
colonies to be provided. Rented colonies should be queen-right, with at least
four brood combs;
2. The dates of delivery and removal of the
colonies;
3. The distribution of the hives on the farm;
4. The fee and schedule of payments. This is
negotiable and depends on a number of factors, including proximity and
transport costs, the quantity and quality of honey produced from the crop, and
the risks, if any, involved in the operation. Due to the fact that he can
expect two different benefits from the operation, the beekeeper should be
prepared to charge moderate prices;
5. Ownership of the honey produced. Normally,
the honey belongs to the beekeeper. If not, his fee is likely to be higher;
6. The right of the grower to verify that the
colonies are up to strength. However, the grower should never attempt to open
hives without the consent of the beekeeper. Colonies can be simply inspected by
counting the number of returning foragers: on a warm, bright day during the
flowering period, 100 bees returning to the hive within one minute is usually
regarded as very good;
7. Restrictions on the use of insecticides or
pesticides toxic to bees, not only during the rental period but for a specified
period before it begins. This is important because the farmer owes it not only
to the beekeeper but also to himself to be sure that the colonies are strong,
and therefore that he does not kill bees by the wrong use of pesticides;
8. Precautions to be taken against bush
fires;
9. Liability for random stinging by bees, for
vandalism, for livestock damage, and for theft of hives.