What spiders make cocoons in trees? how to get rid of them?

Question

I was wondering I moved in my place in Feb and since it got warm im seeing spiders everywhere! Well my son is 4 and he was showing us some cocoons in the trees. They are spider cocoons. Terminix has already been out 3 times in the past 2 months to spray for spiders and they are still coming in the house. Im not sure what kind they are. Yesterday i seen a little brown one, look like a sac spider but it was as small as a ant. i have tons of wolf spiders outside as well.and i was wondering if there is anything i can spray in the tree to get rid of the babies in the trees?

Answer 1

go to

http://www.diatect.com/kill-spiders-ppc....

http://www.bengal.com/ant.htm

Answer 2

I would bet that what you are seeing in the trees are not spiders, but tent caterpillars.  Do they look like this?

http://www.ca.uky.edu/entomology/entfact...

As for the actual spiders, I wouldn't kill them.  They eat a lot of insects and are keping you from being overrun by other bugs.