Spinosad was what best worked for me, you spray only buds, blooms and new growth.

Like BenT said , full strength Spinosad is the best treatment for thrips . Or you can use a lower concentrate if you want like Bonide Captain Jack's dead bug brew .

I had a thrip issue for the first time last year on my white roses (for the first flush), going to try Lacewing Larvae this year. Lacewings do great in my garden every year and keep aphids and thrips well in check, but usually they're not in full swing when the roses have their first flush. I'm getting some from naturesgoodguys.com

Spinosad didn't work for me. I tried it years ago. Now I just ignore the thrips which get on just a few of my roses, and they are soon gone on their own. The thrips have lessened without any intervention. Roses affected are four Evelyn, The Prince, and Augusta Luise to a lesser degree. Diane

I never had thrips in my last garden but the first year in my new garden was terrible. I’m not sure if the location already had them around or they got introduced by new roses I bought but my three huge potted Mme Ansinette’s and two Boleros that moved with me looked terrible that first year. My Eden and White Eden were fine but they bloomed later when the thrips seem to have most run their course.

Last year I scraped back and replaced the mulch a few inches down on the affected roses and religiously picked off all deformed growth even if it meant no flowers and at the end of the season I replaced the mulch again. This year I’ve had a handful of deformed leaves but no deformed buds yet - fingers crossed since last year at the same time the infection was quite obvious.

All my roses are currently potted which does make controlling the mulch a bit easier but my understanding is even in the ground they don't travel far.