I doubt it is aphids because I get the bud bumps here where there are no aphids on the daylilies. There are thrips though, but that doesn't necessarily mean they do it, although they may be the guilty party. Stopping the bumps by treating for thrips also doesn't convict them because whatever was used for the thrips potentially may also control another pest. What would be enlightening would be if someone got the bud bumps without having thrips (and we may well all have thrips), or had thrips without treating for them and did not get the bumps.
