Hi, I've this white infections on my Adenium Plants for about 1 month. During this time, I've tried Imidacloprid Soil Drenching for about 2 times and foliar spary 2 times. But, the infection slowed down but didn't stop. I've also sprayed various contact fungicides. But still can find some of these white things under my leaves. Are they wooly aphids or something else? Please advise me what to do. Thanks, HK77