try Neem oil, it helped me with my spidermite problem, they were gone in 4 - 7 days.
http://www.discoverneem.com/
Formulations made of Neem oil also find wide usage as a bio-pesticide for organic farming, as it repels a wide variety of pests including the
mealy bug,
beet armyworm,
aphids, the
cabbage worm,
nematodes and the
Japanese beetle. Neem Oil is not known to be harmful to mammals and birds as well as many beneficial insects such as
honeybees and
ladybugs. It can be used as a household pesticide for ant,
bedbug, cockroach, housefly, sand fly, snail, termite and mosquitoes both as repellent and larvicide (Puri 1999). Neem oil also controls
black spot,
powdery mildew,
anthracnose and
rust (fungus).
For use as a bio-pesticide, pure Neem oil should be diluted at the rate of 1 teaspoon per quart, or 4 teaspoons per gallon of water (
metric: 5.2 millilitres per litre). Adding a
surfactant greatly enhances its effectiveness.