CASE STUDIES
DRYWOOD TERMITES
TERMITES OF CALIFORNIA
Unlike the Subterranean termite, they do not require any
contact with the soil. They live in undecayed wood with a
low moisture content.
Diet
Habitat
Signs of Infestation
DESCRIPTION:
Individuals are in distinct forms or castes - reproductives,
workers, and soldiers. Each performs a separate biological
function. Only the reproductives are winged (4 wings).
Their
are no workers in the drywood termite group - instead the
young reproductives and soldiers serve as workers until they
mature. The vast majority in the colony is the worker caste
and the workers and the reproductives have chewing
mouthparts especially adapted for chewing wood. It is the
workers who do the wide-spread destruction. The soldiers
have powerful mandibles to attack their enemies (usually
ants).
Male
and Female reproductives up to 1/2 inch long.
Bodies soft and cylindrical in shape, usually pale brown in
color; six legged; they have compound eyes and chewing type
mouthparts. During the winged stage there are 4 equal size
wings that extend longer than the body by 1/8-1/4 inch.
Soldier 3/8 inch;
Wood and
occasionally other cellulose materials. They eat wood in
houses, utility poles, furniture and dying trees. They can
not digest the cellulose directly. They have other
microorganisms (protozoans and bacteria) in their stomachs
that help break down the cellulose which then can be
digested by their own metabolism.
They
live in small social colonies in dry wood. They mate and fly
to new dry wood areas; enter a small hole in the wood and
start to form a colony.In the first year, colony size may be
only around 50 . After 4 years, there may be as many as 700
individuals in one colony. At this time, the colony may
swarm to start the cycle over again. After 15 years, the
colony will have grown to approximately 3,000 individuals.
They do not need a source of water and live off of the
water that is produced from the digestion of the cellulose.
They
infest dry, undecayed wood, including structural lumber as
well as dead limbs of native trees and shade and orchard
trees, utility poles, posts, and lumber in storage.
The
Drywood variety have a low moisture requirement and can
tolerate dry conditions for prolonged periods. They remain
entirely above ground and do not connect their nests to the
soil.
Piles of their fecal pellets, which are distinctive in
appearance, may be a clue to their presence.
From
these areas, winged reproductives seasonally migrate to
nearby buildings and other structures usually on sunny days
during fall months.
This
type is usually found in the humid coastal and subtropical
regions (i.e. California, Hawaii, Florida, Arizona, South
and North Carolina, New Mexico, Texas, Alabama, Mississippi,
Louisiana and Puerto Rico). They usually infest attic spaces
or exterior wood members exposed to them when they swarm in
early spring or summer.
1.
Shed wings
2.
Ejected pellets
3.
Galleries inside wood are typical signs of a drywood termite
infestation.
4.
Swarming ants are many times confused with termites, but
their differences are easy to recognize.
5.
Piles of their fecal pellets, which are distinctive in
appearance, may be a clue to their presence.
The fecal pellets of drywood and dampwood termites
Fecal
pellets of drywood and dampwood termites. are elongate
(about 0.03 inch long) with rounded ends and have six
flattened or roundly depressed surfaces separated by six
longitudinal ridges.
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