How to get rid of scale on various palms
Scale started on some herbs Daisy’s and has now spread onto my Areca palms, pony tail palms, mancho ferns, and potted tree palms(don’t know name of these). I have used mixture if 1/2 alcohol, 1/2 water, and dish soap but cannot get rid of them completely. Seems to be spreading
If you send photos we may be able to give you more specific information. But general observations are: if you in fact have scale insect pests, they will be a different type on different plant materials. Pests on daisies will not be the same as on palms. Pest identification is vital for developing an integrated pest managment program.
Insecticial soap will not be effective for control of adult scale insects, only for the immature "crawler" stage. Adults have a protective covering like a turtle. Timing is everything.
Scale insect pests will require a "systemic" insecticide at this time of year when adults are settled in and feeding.
Don't use alcohol in a spray solution, it can be drying and toxic to plant tissues, dabbing it directly on a scale insect body is ok, but don't drench the foliage or stems.