I suppose there are only two generally way that would sum up the entire idea of pest control approach, even with spider control. One approach would be the use of preventive, non-chemical based methods and the other would be the chemical based. Both of them are effective and efficient in dealing with spider pests but more than half the time only one of them would fit to one's preferences on pest control methods. Sometimes, the preferences are governed by some set of rules and regulations as there are certain restrictions on some methods of approach in dealing with pest spiders. For example, there are some chemical based spider control pesticides that are not allowed in some states because they could serious detriment to the surrounding environment once it is used. Such considerations should be carefully and thoughtfully underscored to ensure that you will not have to go through any legal ramifications and sanctions in the near future.
But before we move on discussing about these pest spider control methods, there is an important thing that must be impressed to the reader of this article. The idea here is only to control them and not eradicate them. One must understand that supposedly, spiders are ought to be encouraged to exist in the environment because of their natural purposes that serve crucial importance to the ecological balance. Your task then is to maintain their numbers that they don't go out of hand and cause setbacks to your properties. At some point even, using pesticides to deal with spiders are no longer necessary, as they will on their own remove themselves from human territories. What you are actually doing when executing a pest spider control method is that you are controlling their population. And I suppose the best approach is to naturally get rid of their food sources by implementing sanitation inside your house. That way you wouldn't even have to kill them whenever necessary.
Prevention and Organic Pest Control Methods
Spiders are often small creatures and would conveniently fit in through small openings. Seams and small cracks are ideal passages for spiders to get inside your property. It would be wise to seal off these openings to prevent any further spider incursions. Another way for spiders to infiltrate inside your house is through vessels firewoods, plants, boxes, cartons and crates which are often transported inside-out of your house. In order to prevent spiders' transportation through these vessels, make sure that any of the items are checked and cleaned first before they are carried inside your home. That way you will prevent the spiders from attaching themselves through these items and infiltrating your home. Regular routine chores also help a lot in controlling spiders in your house. Usually spiders like to lurk and thrive in dirty secluded places and you have to make sure that such places don't exist inside your house. Vacuuming is always a very effective way to deal with spiders as their soft bodies could never be able to withstand the suction pressure. And also, clean off cobwebs as you see them. Dusty old cobwebs are potentially no longer in use by any spider.
If you are to take care of individual spiders, you may be able to do so placing a jar on them. Not the other end though cause it would squish them. Place a piece of paper beneath the jar so that they will be sealed within the jar and you can then just throw them away for good. Make sure you throw them away from your house otherwise, they will just probably find their way back in.
Screens could also help a lot in keeping spiders away from entering your house. Not only does it deter spiders from getting in but as well as other insects that spiders would have for food. If there's no food source to find inside your house, spiders will find no interest in thriving in your place. Make sure that the screens that you will use are those that are tight and have very small openings to ensure no insects will ever get through. You also have to regularly check on the screens to make sure there are no damages or ran on it.
Chemical Control
Usually, pesticides are of no use to quelling spider infestations unless you can visible spiders and spray it on them. That's the only time that spider pesticides could actually work. Fumigating type of pesticides is usually prohibited as they could often lead to serious health hazards and environmental risks due to unintentional absorption. There have been many occasions when a spider remains unaffected by any spider pesticide treatments. A spider may just walk on and over a treated area without getting killed even if the treatment has just been implemented a few hours ago. It means, it can only take effect on the spider if the pesticide is directly sprayed on the spider itself. The residuals of the spray have little or no effect at all to its target.
There are also certain chemical treatments that contain amorphous silica gel and also pyrethrins that deal with spider problems. However, complex chemicals such as these ought not to be used by amateur hands. Hence it would require professional assistance to have them applied effectively, and even with a professional's hands there are still necessary precautions that have to be done initially to ensure that the implementation of the chemical is safe. The chemical works as a corrosive element that imbues itself with the dust and air and once it comes in contact with the spider; the spider's exoskeleton will react to it, causing it to dry out and would eventually kill the spider at some point. The process is somehow like dehydration wherein the organism is deprived of its water components. Usually, these treatments are placed on seams and cracks wherein spiders are most likely to go through. So that by the time they get in the house, they wouldn't have much time anymore to live.