Integrated
Pest Management, or IPM, is an ecological
approach to suppressing pest populations in which all available
necessary techniques are consolidated in a unified program, so that pests are
kept at acceptable levels in effective, economical and environmentally safe
ways. Because pest problems are often symptomatic of ecological imbalances, the
goal is to attempt to plan and manage
ecosystems to prevent organisms from becoming pests.
The IPM
Approach:
- Know your pests. Identify target species and understand pest behavior and ecology.
- Incorporate pest exclusion barriers in the design and construction of facilities. Modifying existing facilities should not be discounted.
- Monitor pest activity.
- As needed, apply appropriate intervention techniques to keep pest activity below injury levels.
- Monitor efficacy of pest control measures and pest activity.
Knowing
Your Pests
- Pest that cause the damage should be correctly identified; this is the foundation of correct decision making.
- There should be enough information about the biology of the pest encountered to assess the potential risk that the pest poses and determine the best possible management strategy. Below is the brief description, economic significance, life cycle and habitat of common pests.
PEST
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BRIEF DESCRIPTION
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ECONOMIC SIGNIFICANCE
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LIFE CYCLE
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HABITAT
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Norway Rats
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Stocky
burrowing rodent, found in human habitations.
An adult weighs about 400g. Reddish brown
fur, blunt muzzle, has bicolored tail that is shorter than the head and body.
Ears are small and close set. Droppings are large and bulky.
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Three
major reasons why rats and mice are considered pests:
·
They
consume and damage human foods in the field and in stores. In addition, they
spoil it by leaving behind urine and droppings.
·
Through
their gnawing and burrowing habit they destroy many items and structures. By
gnawing through electrical cables, they can cause fires.
·
They
are responsible for transmitting diseases dangerous to men e.g. leptospirosis
from blood and urine of rats, plague (bubonic,septicemic, pneumonic) and
salmonellosis.
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Reaches
sexual maturity as early as 3-5 months. 21 to 23 days gestation period. Life
span is about 1 year and can have about 4 litters per year with an average of
8 young per litter.
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Adaptable
to tropical and temperate conditions. Prefer ground level and burrow. Have
predetermined pathways, are neophobic, tend to avoid open spaces and are
nocturnal. Rats are omnivores.
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Roof
Rats
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Smaller
than Norway
rat, agile climbers and live on elevated spaces. An adult weighs about 120g.
Slender body and pointed muzzle. Has almost single colored tail that is equal
or longer than the head and body. Ears are large and prominent. Droppings are
medium and slender.
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Reaches
sexual maturity as early as 2.5-5 months. 21 to 23 days gestation period.
Life span is about 1 year and can have about 4 litters per year with an
average of 6 young per litter.
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Adaptable
to tropical and temperate conditions. Prefer double walls, ceiling spaces,
furniture and nests outdoor. Have predetermined pathways, are neophobic, tend
to avoid open spaces and are nocturnal. Rats are omnivores.
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House
Mouse
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An
adult weighs about 15g. Fine dusky grey fur. Small and slender body; pointed
muzzle. Has semi-naked tail that is as long as head and body. Ears are large
and prominent. Droppings are small and rod shaped.
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Reaches
sexual maturity as early as 2 months. 19 to 20 days gestation period. Life
span is about 1 year and can have about 4-6 litters per year with an average
of 8 young per litter.
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Adaptable
to tropical and temperate conditions. All species are good climbers and
swimmers. Prefer double walls, furniture and closets. Can live without free
water and are more adventurous.
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Red
Flour Beetle
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Flattened,
reddish brown, parallel sided. Eyes crescent shaped. Larvae elongated and
light brown in color. External feeders and cannot thrive in sound grain.
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Makes
heavily infested materials unpalatable and even unsafe to eat. These insects
excrete chemicals known as benzonquinones which have unpleasant smell and are
suspected carcinogens. Under poor hygiene conditions, may act as intermediate
host for several tapeworms.
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Egg
to adult development is 20-25 days. Adult will live up to 2-3 years under temperate
conditions. Females may lay up to 1000 eggs over their lifetime.
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Increase
rapidly under hot humid conditions (optimum at 35-37.5 Cel., 70%RH). Will
thrive in milled cereal products such as flour, rice bran, corn bran, etc.
Capable of flight and is most active during the afternoon.
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Grain
Weevil
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Cosmopolitan
pest of grain, preferring whole grain to flour or meal. Dark brown to black
snout beetle with lighter reddish yellow spots on the front and back of each
wing cover. Size of rice weevil is <3mm while that of corn weevil is
>3mm.
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Penetrate
and feed on the internal portions of whole grains during the larval stage,
making early detection of infestation difficult. Infested material is
hollowed decreasing its nutritional value and making it unpalatable.
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The
egg hatch in 3 days into soft, white, legless fleshy grubs that feed on the
interior of the grain, hollowing it out. The larvae mature in 3 weeks. They
change to white pupae and emerge 5 days later as adult. Each female can lay
between 300-400 eggs in her lifetime. They live from 7-8 months but may
survive up to 2 years.
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They
are usually found in grain storage facilities or processing plants. The
female weevil chews small cavities in the kernels and deposits one egg in
each cavity. The cavity is then sealed with a plug of gluey secretion by the
mother.
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Cockroaches
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Cockroaches
are generally either scavengers or omnivores. Mainly nocturnal and will run away when
exposed to light. One of the hardiest insects on the planet, capable of
living for a month without food and can remain alive headless up to a week.
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Besides
pilfering foods and papers, other material losses occur when cockroaches
stain or contaminate utensils, packaging and other stored items. They disrupt
electronic devices and computers with their bodies or excrement.
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Female
carry an egg capsule containing around 40 eggs; development from eggs to
adults is 3-4 months; cockroaches live up to a year; the female may produce
up to eight egg cases in a lifetime; in favorable conditions, it can produce
300-400 offspring
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Cockroaches
spend most of their time in narrow, tight cracks and spaces where surfaces
touch them on both sides. It prefers damp and cool areas, basements and crawl
spaces; near drains and leaky water pipes. Proliferation is often associated
with poor sanitary conditions.
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House
Fly
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Most
common observed stage of a fly is the winged adult. Flies are relentless -
they live basically to reproduce. They rely heavily on sight for survival.
Usually smaller in size compared blow fly.
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Flies
have filthy habits that make them efficient disease transmitters. They
transmit disease organisms causing typhoid fever, cholera, summer diarrhea,
dysentery, tuberculosis, anthrax, as well as parasitic worms. They are also
vectors of salmonella bacteria which are directly transmitted to us by way of
their mouthparts or through their vomit or feces
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Typical
life cycle is 21 to 25 days from egg to adult; female fly lays twenty batches
of eggs during her short life span, with each batch containing between 40-80
eggs; two flies can easily produce 1.8 million breeding pairs within just 12
weeks
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Prefer
breeding medium that is moist and will provide food for the developing larvae
– pale legless maggots. These breeding media include garbage, sewage, rotting
debris, dead animal carcasses, animal excrement and even ground with excess
organic matter.
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Blow
Fly (Bangaw)
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Medium
sized flies with metallic blue, green, bronze or black sheen that may produce
an audible buzzing sound. Blow flies are basically scavengers.
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Mosquito
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Mosquitoes
are not only nuisance as biting insects, but are also involved in transmitting
disease to humans and animals. They female mosquito fed on blood to obtain
the protein necessary for the development of her eggs.
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Of
all the animals on earth, mosquitoes pose the greatest threat to man’s health
and existence. Diseases they transmit include malaria, yellow fever,
filariasis, dengue fever and encephalitis. These diseases kill and debilitate
millions of people worldwide even with today’s advances in medicine.
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Mosquitoes
have four stages of development:
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Egg
– deposited on moist surfaces or still waters
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Larva
– thrives on water
·
Pupa
– does not feed but extremely active
·
Adult
– assumes terrestrial existence
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Needs
water for its larval and pupal development. They are commonly harboring in
stagnant water found in discarded tires, ornamental pools, tin cans, gutter,
etc.
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Termites
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Termites
are small, white, tan or black insects. The largest termite is the queen; her
function is to lay eggs. The king is always by her side. Soldiers have large
heads with powerful jaws, or a bulblike head that squirts liquid. But the
largest group of the termite colony is the workers. They toil long hours
tending the queen, building nest or gathering food. Queens
and kings last for decades while individual workers can survive for several
years.
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Termites
eat wood and other cellulose materials. They are also beneficial because they
enhance the decomposition of organic matter and the return of nutrients bound
up in wood to the soil. They produce methane gas as by-product of their
digestion.
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When
a female from a mated pair begins laying eggs, both the king and queen feed
the young on predigested food until they are able to feed themselves. Once
workers and nymphs are produced, the king and queen are fed by the workers
and cease feeding on wood. Termites go through incomplete metamorphosis with
egg, nymph and adult stages. Nymphs resemble adults but are smaller and are
the most numerous in the colony.
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Termites
live on woods (wood-inhabiting) or tunnel into the ground (subterranean).
Most species have microscopic, one-celled animals called protozoa within
their intestines that help in converting wood (cellulose) into food for the
colony.
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Ants
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Ants
can lift 20 times their own body. They use their antennae for touch and sense
of smell. The head has a pair of large, strong jaws which can open and shut
sideways like a pair of scissors. Adult ants cannot chew and swallow solid
food, instead they swallow the juice which they squeeze from the food. The
two eyes are made of many smaller eyes.
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· Ants are tireless scavengers;
they help to recycle dead and decaying organic materials.
· Help reduce population of
flies since they prey on the immature stages of fly
· Help get rid of garment lice.
· Attacks and kills
caterpillars and larger insects in some citrus fruits
· Ant bites are annoying to humans
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Average
life expectancy is 45-60 days. They have four distinct growing stages, the
egg, larva, pupa and adult. The queen lays eggs, hatch and feed the larva
with her own metabolized wing muscles and fat bodies until they pupate. After
several weeks, the female adult workers dig their way out of the nest to
collect food for themselves and for the queen who continues to lays eggs.
After a few years, the colony begins to produce winged male and female ants,
which leave the nest to mate and form new colonies.
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Ants
usually nest in soil which is often found next to buildings, along sidewalks,
boards, stones or in close proximity to food sources. Ant foods include
fruits, seeds, nuts, fatty substances, dead or live insects, dead animals and
sweets. They enter buildings to seek food ann water, warmth and shelter, or a
refuge from dry, hot weather or flooded conditions. They may appear suddenly
in buildings if other food sources became unavailable outside or weather
condition change.
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Birds
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Birds
include sparrows, crows, doves, pigeons, swallow and others. Most birds
causing problems are classified as migratory non-game birds and are
protected. Birds have enormous value as insect eaters.
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· Usually feed on insects,
cereals, feeds, seeds and a variety of plants.
· They damage polystyrene and
other soft insulation in warehouses, poultry and hog raising facilities.
· Their nests have been known
to cause short circuits and fires in electrical substations.
· Transmit diseases to humans
and animals including psittacosis, Newcastle
disease and many others.
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Young
birds at hatching fall into two general classes: altricial – hatched blind
and naked, cannot support themselves on their legs and wholly dependent on
parents or precocial – hatched with eyes open, densely covered with down, can
walk and find some of their own food. Young birds may stay with their parents
for 1-3 years, helping to feed and guard the young before going off to find
mates. Life expectancy is correlated with size.
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Eggs
are laid in sites varying from bare ground to highly elaborate nests usually
found on trees or ceilings.
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Stray
Animals
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Includes
dogs, cats, goats, etc.
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· They consume and damage human
foods in the field and stores; they spoil it in stores by leaving urine and
droppings reducing the sales value
· They destroy many articles
(packaging, furniture, etc.) and structures.
· Responsible for transmitting
diseases dangerous to man such as rabies, salmonellosis, etc.
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Stray
animals are usually mammals. They reproduce sexually. After mating, embryo is
formed in the womb through mitosis until fetus is formed and after several
months the mother gives birth to a young animal. Young animals feed on milk
from the mother until such time that it can eat solid food. During this time,
offspring start to live independently and mature after months or years.
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Most
stray animals are land dwellers. They feed on littered foods and garbage
sites. They usually have no shelter and stay where there is food source.
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