I have fungus gnats in my plants, But i guess im lucky cuz im at day 66 and i guess im gonna finish well.
About spidermites:
Tabacco Juice recipe
Take 3 strong ciggeretes soak them over night in water
Boil it for 2 to 3 miniutes, let it cool off and spray the plants 3 to 4 times a week. You can add safer soap if you like to the mixture.
(make absolutly sure you use gloves/face protection while handling and spraying)
Neem oil works very well too!!
ZBQ has an excellent thread on how to use neem oil without geting your plants to oily!! OpenDNS :tup: Your Last resort is to use Avid.