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Minnesota Pest Control – Spiders
Written by admin Posted On Tuesday, October 18 2011
MN Pest Control- Spiders
Spiders are a common group of arthropods. They are similar to insects in that they both have exoskeletons and jointed legs. However, spiders differ from insects in several ways. Any arthropods that share the same characteristics as spiders are known as arachnids. Other arachnids, or spider relatives, include ticks, daddy-longlegs, scorpions, and mites.
Another difference between spiders and insects is that all spiders can produce silk throughout their lifetime. However, just a few insects can produce silk, and then at only certain times during their life. Spiders use silk to build webs and other types of snares, egg cases, draglines, and refuges. Silk is also produced by spiderlings (young spiders) during a process called ballooning in which the spiderlings shoot silk into the air and are carried away by the wind.
Spiders are predators, feeding mainly on insects. Spiders are considered beneficial because of the large number of insects they prey on, including a number of pest species. All spiders have venom and are therefore venomous. However, most spiders are harmless to people. They are very shy and usually remain hidden in undisturbed areas. Many are active only at night. They are not aggressive and they will try to escape when confronted. Few spiders bite, even when coaxed. Fortunately, the bites of most spiders are less painful than an average bee sting.
Control Of Spiders In and Around Homes
Spiders are common in homes during warm weather, although they can be found indoors any time during the year. Their numbers usually peak during late summer and fall, when they are sometimes found indoors searching for winter hibernation sites.
Spider control is usually challenging. It is difficult to eradicate all spiders from a home. It is also unnecessary. Properties located in areas favorable to spiders, such as by rivers, lakes, or fields, are more likely to have large numbers of spiders.
Tolerate spiders whenever possible. Because of their beneficial nature, they are very important to the environment. When tolerance is not possible, use an integrated approach using nonchemical methods supplemented with chemical means to reduce spider numbers.
If it is necessary to reduce the number of spiders in and around your home, start with nonchemical methods including sanitation to prevent spiders from entering from the outside.
- Remove piles of bricks, firewood, and other debris that may serve as suitable homes for spiders or move them further from your home.
- Keep grassy or weedy areas near buildings cut short.
- Trim back shrubs and other plants that directly contact your home.
- Knock webs down with a broom or a hard spray of water.
- Remove and destroy any egg sacs or spiders that are found.
- Caulk or seal obvious cracks or spaces around the foundation, doors, and ground level windows.
- Check to be sure screens fit tightly. Replace any screens that fit poorly or are damaged.
- Change outside lights to reduce insect prey that can encourage spiders. Yellow lights are less attractive to insects than mercury or sodium vapor lights.
Regular housecleaning is very important in the control of spiders indoors. Large, persistent spider populations indoors indicate the presence of a significant insect population that serves as their food.
- Remove papers, boxes, bags, and other clutter to minimize favorable sites for spiders.
- Remove webbing with a broom or vacuum, and destroy any egg sacs and spiders that are found. Look especially around windows, in corners and other relatively quiet places.
- Eliminate insects that serve as a food supply, especially when large numbers exist. Check particularly in and under webs to see what insects have been captured.
You can supplement your sanitation efforts with an insecticide treatment. Treat especially behind base-boards, in cracks and crevices, and other places where spiders may hide. General treatments on surfaces and fogs are not effective. Most insecticides labeled for ants and cockroaches are also labeled for spiders. These products are commonly found in aerosol ready-to-use cans.
CAUTION: Read all label directions carefully before buying insecticides and again before using them. The label is the final authority on how you may legally use any pesticide.
Common Spiders in and Around Your Home
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