General Spider Characteristics:
Many species of spiders are common household pests in the United States. Spiders are considered a beneficial pest because
of their prey to other insects and many people do not consider spider
control measures for most spiders. Because spiders have eight legs, they are easy to separate from other insects, which have only six legs. Another distinction between spiders and other pests is that spiders do not have wings or antennae.
Location of Spiders:
They are found in moist basements, crawl spaces, and other damp parts of buildings. Other spiders live in warm, dry places so are found in sub floor air-vents, in upper corners of rooms or in attics. Most species hide in cracks, darkened areas, or other retreats which they construct of silk.
Some spiders will form cob webs in basements, corners and over lamps and other spiders do not spin webs. No other insect will make a cobweb.
Spider Bites and Venom:
All spiders use venom to kill there prey.
However their are three North American species that
are dangerous to humans: Black
Widow Spiders and Brown
Recluse Spiders, and European House Spider and should consider spider control.
It is interesting to note that all three of these types of spider do not create spider webs indoors.
Although there is generally little danger resulting from spider bites from most spiders, it is advisable to consult a physician from spider bites.
BLACK WIDOW SPIDERS
The female has a shiny black, globular abdomen with two yellow
or red markings in a triangle shape. It looks like an hourglass. Males
are smaller, lighter in color, with light streaks on the abdomen. The
web is irregular, many times found along exterior foundations on slabs,
under stones and rocks, behind shrubs .They usually don't enter structures
.They will bite if provoked. The bite feels like a sharp pain ,like
a needle puncture. After 15 minutes to an hour there will be muscular
cramps. Bites are rarely fatal, but you should seek medical attention.
For recommended spider control for the Black Widow Spider
see Spider Control Measures
Click here: Black Widow Spiders
For more information on black widow spiders.
BROWN RECLUSE SPIDERS
The body is yellow to dark brown, with the body size of 1/3-1/2
inch long. Combined with the legs it could be about 1 inch or longer
in diameter .The dorsal has a dark brown violin shaped marking, very
distinctive. Their web is off white to Gray .They can be found outside,
under rocks, debris, wood piles, etc. ,but many times they are found
Brown Recluse spiders can be found in storage areas like closets, basements, attics,
garages and cellars. Sometimes they can be around above the ceiling
duct work or register. Many times people get bit by putting their
hands or feet in something that has been in storage. You should always
wear gloves when handling debris outside the home The initial bite
is not intense, but poisonous. After 8-12 hours, the pain is more
intense, and over the next few days large sores form leaving a disfiguring
scar. You should seek immediate medical treatment after the bite.
For recommended spider control for the Brown Recluse Spider
Brown Recluse Spiders
for more information on brown recluse spiders.