Imidacloprid is an insecticide that was made to mimic nicotine. Nicotine is naturally found in many plants, including tobacco, and is toxic to insects. Look for a rose insecticide that has Imidacloprid usually made by Bayer. If you can find the liquid concentrate mix a teaspoon in a gallon of water and water your plant with that for four times when you water so that the plant takes up the imidacloprid. It makes the plant toxic to mealies, scale, and other insects but does not affect invertibrates. It is toxic to bees when they visit the flower so only use it on non-blooming plants outdoors or indoor plants. They say it lasts a year but I find in my greenhouse that 6 months seems to be the limit. As long as you don't introduce a new mealie you should be good longer than 6 months.
This is an example of what you're looking for:
https://www.amazon.com/Advanced-Complete-Multiple-Insects-Imidacloprid/dp/B0044UYKLM
It's sponsored and maintained by Bayer as a public relations stunt in order to--in their corporate minds-- mitigate the impact of the neonics they sell that kill bees. Imidacloprid, the #1 systemic OG playa, is their patented invention.
See the tiny "Bayer" logo in the upper-right hand corner? That's these people. Big Pharma, Big Ag.
Bayer Advanced.
https://www.amazon.com/Advanced-Complete-Multiple-Insects-Imidacloprid/dp/B0044UYKLM
Not sure why they're harvesting emails via the Internet, but I'm sure Corporate Marketing has some really good reason for it.