Just found this online, and since spidermites seem to be quite an annoyance with marijuana plants I thought I'd post it here. I have not tried it myself so I cannot confirm its effectiveness, if someone tries it and finds it effective just let us know
Combine one teaspoon of hot pepper or tobasco sauce, 4 cloves of garlic and a quart of water. Blend well in a blender and strain, with cheesecloth or nylon mesh before placing in your sprayer. This will repel many insects including whiteflies, ahpids, spidermites and caterpillars.
Combine one teaspoon of hot pepper or tobasco sauce, 4 cloves of garlic and a quart of water. Blend well in a blender and strain, with cheesecloth or nylon mesh before placing in your sprayer. This will repel many insects including whiteflies, ahpids, spidermites and caterpillars.