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Drywood Termite Characteristics
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Size
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Color
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Behavior
- Drywood termites are social insects that live in colonies.
- The colonies are composed of kings, queens and soldiers.
- There is no worker caste as in subterranean colonies.
- The work is performed by immature termites before they
become adults.
- King and queen termites perform the reproductive
functions of the colony.
- They are light to dark brown
and 1/3- to 1 inch in length.
- Soldiers guard the
colony against invaders such as ants.
- They are white and
wingless with large brownish heads and jaws.
- The nymphs
(immatures), which are the most numerous caste, are white
and wingless.
- The soldiers and immatures remain inside
the wood at all times.
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Habitat
- Drywood termites infest only dry wood and are most often
found in attic wood structure as they do not require contact
with the soil.
- They need very little moisture because they
are able to live off of the water produced from the digestion
of the cellulose.
- Drywood termites mate and fly to new dry
wood areas, enter a small hole in the wood, and start to
form a colony.
- Colonies will contain up to 2500 members.
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Tips for Control
- There are some things a property owner can do to help prevent
drywood termite infestation.
- Store firewood and lumber away from the house.
- Use
20-mesh screen on all windows and doors, and especially
at ventilation openings for attics and crawl spaces.
- Exposed wood that is sealed with a uniform coating
of paint, varnish or other sealant will help prevent
easy access by drywood termites.
- Be sure to seal
nail holes and cracks.
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Damage:
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Dead trees, branches, brush and firewood
from residential areas are the primary habitat of drywood
termites.
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When land is cleared and houses or other
buildings constructed, these structures are then subject
to attack.
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Drywood termites enter structures through
attic or foundation vents, directly through or under wood
shingles, under eaves and fascia boards, and through natural
cracks, checks and joints in exposed wood trim, window and
door frames and sills.
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Drywood termite alates can penetrate flat
wood surfaces, but prefer to wedge themselves into narrow
places to begin tunneling.
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Most new homes are constructed
on concrete slabs and have tile roofs.
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However, attic
areas are normally vented and wood trim is still commonly
used externally.
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- Drywood termites spend their entire lives inside wood.
- They construct round “kick holes” in infested wood, through
which the fecal pellets are eliminated from the galleries or
tunnels.
- These pellets accumulate in small piles below the kick holes,
or will be scattered if the distance between the kick hole
and the surface below is very great.
- Fecal pellets also may be found caught in spider webs.
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Fecal pellets are distinctive and used for
identification of drywood termite infestation.
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Drywood fecal pellets are hard, elongated
and less than 1/25 inch long.
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They have rounded ends and six flattened
or concavely depressed sides with ridges at angles between
the six surfaces.
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The characteristic shape results when the
termite exerts pressure on the fecal material to extract and
conserve moisture in its hindgut.
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Typically the pellets are a light tan in
color with some black ones mixed in.
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