Rothie, I have never seen that kind of scale on my plants and I have lived in Miami-Ft Laud for a very long time. I am having a bit of a proliferation of regular scale (flat green) and mealy bugs right now because we are at a change in season and they have a chance to get established. I prefer regular Orthene in the spray can. Expensive, but no mixing, no mess. I always wear a bandana over my nose and mouth because it is aeorsolized. However!! be careful of oil based products down here! The sun is so intense right now. Just a little bit of direct sun (like 5 mins) and you will cook your plants that have any oil on them (I have seen it). You will cook those leaves like bacon in a frying pan! Just my