I am having a difficult time eradicating juniper scale on a rocky mountain juniper. I have used: imadicloprid systemic about a month ago, neem oil and Sevin insecticide (the new formulation, not carbaryl). The oil and Sevin were used separately not mixed together). It seems that the scale loved Sevin and have increased since the first application.
Tree was collected in 2016 and is otherwise healthy.
It’s a bit too much to stick them all with a needle. Will it harm the plant to “paint them” with rubbing alcohol?
Your advice on any remedy would be greatly appreciated. Thanks