CA BRANCH 3 Structural Pest Control – Questions
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Terms in this set (195)
How can you tell the difference Wood infested with brown rot typically:
between wood suffering from brown
rot and wood suffering from white
rot? • appears dark brown,
• shows excessive shrinkage,
• develops cross-grain cracking, and
• can be crushed easily to form a brownish powder.
Wood infested with white rot on the other hand,
often:
• appears whiter than normal,
• shows normal shrinkage,
• does not crack across the grain,
• is spongy to the touch.
,What is the difference between the Sapstain fungi live on the starch in wood cells. These
stains caused by stain (sapstain) fungi fungi may discolor the sapwood entirely or in
vs. mold fungi? patches. This stain is deep within the wood and
cannot be removed by brushing or planing.
On the other hand, discoloration caused by mold
fungi is superficial. This means that you can usually
remove the discoloration by brushing or planing.
However, on hardwoods with open pores (very large
and visible vessels) such as the oaks, the surface
molds may cause stains that are too deep to remove
easily.
How can you distinguish between Look at their antennae, waists, and wings. Winged
winged termites and winged ants? termites have straight antennae, thick waists, and
wings that are equal in size and shape. Winged ants
have bent antennae, narrow waists, and forewings
that are larger than the hind wings.
Name the four basic castes of Workers - gather food, maintain the galleries, tend
termites. Describe the basic the young, and groom the other termites.
function(s) of each caste.
Soldiers - guard the colony against predators.
Primary reproductives - "swarmers" that fly out of
their colonies to start new colonies of their own. They
are the future kinds and queens of new colonies.
Secondary reproductives - supplement egg
production in the presence of the king and queen
and can take over the egg laying if the queen dies or
begins to fail.
Do subterranean termites live entirely No, because they require a constant source of
within wood? Why or why not? moisture to survive. However, they can live in wood
with less than 20% moisture by getting their moisture
from the ground. They transport this moisture
through flattened, earthen shelter tubes that serve as
passageways from the soil to the infested wood.
, How do subterranean termites most They gain entry through untreated wood that touches
often infest wood in buildings? or is close to the ground, particularly at porches,
steps, and terraces. They can also infest buildings
through cracks or voids in foundations or concrete
floors that make it easy for termites to reach wood
that is not close to the soil.
Describe the frass pellets of drywood They are small and cylindrical with six depressions on
termites. the sides. These pellets are unique to drywood
termites and are used for identification.
Where do drywood termites most In southern Florida, southern California, and along
often occur? the southern gulf coast of the United States.
Do drywood termites live entirely Yes, because they require little moisture (wood MCs
within wood? Why or why not? as low as 5%). Unlike subterranean termites, drywood
termites have no connection with the soil.
List several ways you can protect To protect wood from subterranean termites, you
wood from termites. can:
• apply insecticides to the soil around buildings, and
• avoid using wood mulches next to buildings.
To protect wood from subterranean and drywood
termites, you can:
• use physical barriers on foundations, and
• use properly preserved wood, which makes it
undesirable as a food source.
With Accurate Solutions
Save
Terms in this set (195)
How can you tell the difference Wood infested with brown rot typically:
between wood suffering from brown
rot and wood suffering from white
rot? • appears dark brown,
• shows excessive shrinkage,
• develops cross-grain cracking, and
• can be crushed easily to form a brownish powder.
Wood infested with white rot on the other hand,
often:
• appears whiter than normal,
• shows normal shrinkage,
• does not crack across the grain,
• is spongy to the touch.
,What is the difference between the Sapstain fungi live on the starch in wood cells. These
stains caused by stain (sapstain) fungi fungi may discolor the sapwood entirely or in
vs. mold fungi? patches. This stain is deep within the wood and
cannot be removed by brushing or planing.
On the other hand, discoloration caused by mold
fungi is superficial. This means that you can usually
remove the discoloration by brushing or planing.
However, on hardwoods with open pores (very large
and visible vessels) such as the oaks, the surface
molds may cause stains that are too deep to remove
easily.
How can you distinguish between Look at their antennae, waists, and wings. Winged
winged termites and winged ants? termites have straight antennae, thick waists, and
wings that are equal in size and shape. Winged ants
have bent antennae, narrow waists, and forewings
that are larger than the hind wings.
Name the four basic castes of Workers - gather food, maintain the galleries, tend
termites. Describe the basic the young, and groom the other termites.
function(s) of each caste.
Soldiers - guard the colony against predators.
Primary reproductives - "swarmers" that fly out of
their colonies to start new colonies of their own. They
are the future kinds and queens of new colonies.
Secondary reproductives - supplement egg
production in the presence of the king and queen
and can take over the egg laying if the queen dies or
begins to fail.
Do subterranean termites live entirely No, because they require a constant source of
within wood? Why or why not? moisture to survive. However, they can live in wood
with less than 20% moisture by getting their moisture
from the ground. They transport this moisture
through flattened, earthen shelter tubes that serve as
passageways from the soil to the infested wood.
, How do subterranean termites most They gain entry through untreated wood that touches
often infest wood in buildings? or is close to the ground, particularly at porches,
steps, and terraces. They can also infest buildings
through cracks or voids in foundations or concrete
floors that make it easy for termites to reach wood
that is not close to the soil.
Describe the frass pellets of drywood They are small and cylindrical with six depressions on
termites. the sides. These pellets are unique to drywood
termites and are used for identification.
Where do drywood termites most In southern Florida, southern California, and along
often occur? the southern gulf coast of the United States.
Do drywood termites live entirely Yes, because they require little moisture (wood MCs
within wood? Why or why not? as low as 5%). Unlike subterranean termites, drywood
termites have no connection with the soil.
List several ways you can protect To protect wood from subterranean termites, you
wood from termites. can:
• apply insecticides to the soil around buildings, and
• avoid using wood mulches next to buildings.
To protect wood from subterranean and drywood
termites, you can:
• use physical barriers on foundations, and
• use properly preserved wood, which makes it
undesirable as a food source.
