Spiders

Any product containing pyrethrins should do the trick. Spray flowerbeds, around retention walls, beneat rain catchers, etc. Prior to using pesticides, focus on exlusion. Seal all doors and windows and make sure the plumbing lines under your sink are properly sealed.

• Take preventative measures (get the bed away from walls, shake clothes before putting them on, don't walk around barefoot, don't store things in old closets with many cracks, check sheets before going to bed)
• Ask you physician to subscribe you something that is an antihistamine that can treat allergic responses. Some scientists says it works, others disagree, but it cannot harm to try it
• Go to you physician if you have been bitten and keep track of the development of the bite. As said, mine were minors and healed within two weeks (not even open wounds). There are many sorts of reactions to it.

No, in the phylum Arthropoda there are several classes, two being Insecta, insects, and Arachnida, spiders. This means that spiders and insects are related, but they are not the same and spiders are not a type of insect. Spiders and insects are at the same level of classification. There are several differences between insects and spiders. The first and easiest way to distinguish them is that insects have 6 legs, and spiders have 8. Insects also have three body segments, head, abdomen, and thorax, while spiders have just two, cephalothorax and abdomen. Spiders are always wingless, but most adult insects have wings. There are a few exceptions such as walking sticks, fleas, silverfish, springtails, thrips, and in some species just one gender is wingless, such as the velvet ant. This is not a good way to tell the difference between spiders and insects, because there are a few adult insects without wings, and all immature insects are wingless, they don't get wings until they become adults.

Spiders fall in the class arachnid (Arachnida), which is due to the fact that they have 8 legs instead of 6 . Other arachnids are scorpions and ticks, to name but a few.

Visually, you can distinguish them easily because spiders have eight legs, two arm-like pedipalps, and no antennas, whereas insects have six legs, no pedipalps, and two antennas. Spiders have two main body parts of about equal size, and insects have three body parts, a small head, a medium-sized thorax, and a large abdomen. Spiders have fangs, and almost all spiders deliver venom through their bites. Insects do not have fangs but some of them have stingers that inject venom. All spiders produce silk from teat-like organs that extend from their abdomens. Some insects produce silk from their mouths when they are pre-adults, and they use this silk to produce shelters such as cocoons that protect them while they change into their adult forms. Insects mate by making a direct contact between sexual organs at the ends of their abdomens. Spiders use a complicated procedure. Male spiders deposit semen onto a special silk pad, and then absorb the semen into their pedipalps. They then approach a female, negotiate with the female, and if accepted by the female they will introduce their pedipalps, one by one, into the sexual organ of the female, which is located on the underside of the abdomen. Semen is then deposited inside the female spider.

No spiders have wings. Many insects have wings for at least part of their adult lives. Almost all spiders live solitary lives, but a few species live in large but leaderless colonies. Many insects live in large colonies, and the individuals of these colonies may perform different functions on behalf of the entire colony. Frequently an insect colony has one or only a few sexually mature females who lay eggs for the entire colony, but female spiders do not demonstrate such specialization of functions within their colonies.

These are only a few of the differences between spiders and insects.

I don't know where you are. There is no poisonous yellow and black spider in North America. The only poisonous spiders in North America are the black widow and brown recluse. All others are beneficial because of the insects they eat.

We need to know where you are, where you saw the spider, size of spider, what the web (if any) looks like, was spider "hairy" or shiny?

It sounds like a common orb weaver, aka common garden spider or Black and Yellow Garden spider, Argiope aurantia, which are way cool. They build a huge web every evening to catch mosquitoes and other flying insects. The next morning they often actually eat the web and go off to hide till evening. Watching them spin the web is really something.

Go to Google Images and look up Argiope aurantia, see if it the one you saw.

Do a regular Google search for Identify Spider and you'll see sites where you can see many spiders including poisonous ones and webs.

Below are some links to Yellow Orb Weavers, check out the rest of site too.