Next time you sync with iTunes, do it by USB. After your device is recognized by iTunes, go into the Apps tab and UNcheck the apps you do not want installed during the sync. From that point on, iTunes will install/sync only the checked apps and you should be OK.
HOWEVER, it pays to check the list each time - or at least periodically. App updates can mess you up and re-install an app. iTunes will then continue to sync it.