I became overly familiar with Thrips from growing roses for so many years. I just about gave up on White roses as they were almost always heavily damaged by Thrips. Thrips hate the light, which is why in single petaled roses which open wide quickly there is often less evidence of Thrips damage then in the densely petaled ones....... But Thrips aren't always hanging around just waiting for Maryl's blooms to open. It may seem like it, but it's not so. They prey on too many other plants that bloom at the same time. I suspect that some of the undamaged buds on ruffly daylilies just weren't noticed by the Thrips. Also, Thrips are cyclical. So you gets waves of them then some relief as they move on to greener pastures.....I've often wondered if putting a baggy over a bud at a certain stage of development might be a good test to see if that stops the blotching. Personally I've never tried it on roses or daylilies. As you said, sometimes it's easier to just move on. I did it with roses, eliminating all but a few whites, and I do it with daylilies.........Maryl
