Not sure what happened from previous years to this year but my lantana plants have all been attacked by lacebugs. Last year they were healthy and massed with butterflies of every sort (even my husband noticed, lol) and this year they're white and crispy and no blooms (or butterflies either........SO disappointed).

Does anyone have any suggestions as to what they did to treat these monsters? I've seen suggestions for chemicals, of course, but don't want to do that in my butterfly garden. Does insecticidal soap work? Cutting them back?