Sounds like Spittle bugs to me... I get those darned things every spring
, until things dry out around here. I know that you can kill them with strong doses of Sevin, although I hate to use that stuff.
Since they get on ANYTHING GREEN (& especially like my Strawberries & my 70 foot Iris row), it's easier to wash them off with the heavy spray setting on the hose nozzle. Some of them come back, but I keep doing it a few times a day till they're gone (usually not more than a couple weeks). They can't live without being inside that mass of bubbles they make, because they dry out real fast & die.
Other than the Cucumber Beatle, Spittle bugs are just about the only insect I have more than my share of!
Good luck with your Daisies!