Whitefly? in the GH. Help!

When you have whitefly if you touch the plant they all fly...it's like dandruff

I had it once on overwintered kale in the greenhouse and was a bigger to get rid of.

I think SP uses ladybirds? But I think it may be something different for whitefly. I'm not sure.
Be sure to post what you do. What a pain this early in the season.