I had an attack that lasted best part of 4 months but I was doing a rolling harvest so couldn`t stop...I tried: Neem Oil, Insecticide Soap, SM-90, Alcohol (For me and the girls), Bug Clear Ultra & Mighty Wash...what I have found is Mighty Wash is just plain awesome but they will come back, Bug Clear is good but they get used to it quickly, Neem and Insectide Soap combined is very good as is alcohol/water solution. I used Mighty Wash to kill everything mite wish but I don`t believe it`s systemic though it`s a bit confusing on the net, then weekly neem/insectide soap as that is systemic though once buds have formed I`d hit with alcohol/water, just insecticide soap or if bad, Mighty Wash or Bug Clear. I was recommended a Cooper fungicide as good as well but haven`t tried.
They evolve so you need to just keep at them but they are really hard to eradicate. I shut down eventually to try and break the cycle...oh, SM-90`s okay but that`s about it in my experience...good luck mate, they can be controlled but it`s hard work and not good for things like Scrog