Insecticides For Spiders
Residual insecticides, which are pesticides that keep working for weeks or months after application, are effective in controlling and preventing spider infestations. In order for insecticides to work, they should be applied wherever spiders may present themselves. These areas include corners, behind refrigerators and in dark, moist places such as basements. Insecticides should also be applied to the boundaries surrounding the outside of the home in order to prevent spiders from entering. Household insecticide products containing bifenthrin, cyfluthrin, permethrin or tetramethrin are most effective for killing spiders on contact and preventing them from returning, as long as the treatment is repeated as often as recommended by the product's manufacturer--typically every two to three months. For tougher cases, professional-grade forms of these products in stronger concentrations may be necessary; these strengths of insecticide must be applied by professional exterminators.
Water Bug Killers
Water bugs are another name for the American or German Cockroach. Cockroaches are notorious for their propensity to breed and infest. One of the most effective treatments against water bugs is boric acid. Boric acid comes most commonly in powder form. When water bugs come in contact with the powder, it sticks to their bodies, and they ingest the poison when they clean themselves. Another insecticide that is effective in the treatment of water bugs is Pyrethrin. Pyrithin normally comes in a spray form and is applied to cracks and crevices where water bugs tend to hide. The residual effect of Pyrethrin is effective against re-infestations is applied as often as is recommended by the manufacturer. Typically, the suggested application frequency is every two to three months.
For health conscious consumers who prefer to use non-toxic forms of insecticide, there are a great many alternatives that are as effective as their chemically based rivals. Products that contain natural ingredients such as neem seed or natural sandalwood are particularly effective against both spiders and cockroaches. Another effective remedy against water bugs is the combination of sugar and baking soda. Mix equal parts sugar and baking soda, and then spread the mix in areas where water bugs tend to appear, such as kitchen cabinets and corners. The bugs are attracted to the sugar and, once the mixture is ingested, they are killed by expansion in their bodies caused by the baking soda.