I've been growing orchids for 20 years and today I noticed a scale underneath one of my orchid's leaves. I used a Q-tip w alcohol and removed but I'm concerned about my other 21 orchids. I did recently purchase BioAdvanced 3:1 and fortunately it still has a bit of Imidacloprid.
My plan is to take all plants outside and spray liberally, repeat in 2 weeks X2.
Sound like a good plan? Any other suggestions?