Can you help me identify what this growth is and how to get rid of it?

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I had to leave three tal Plumeria plants at our last home in Southern VA as they were too big (6' + and wide!) to transport. We took off 3 branches (which those of you that know, grow easily in soil to new plants). ** 1st time I have EVER seen this in over 12 years of having Plumeria plants with this Orange "growth" on the underside or anywhere on a plant.** Any idea what this is and how to spray or keep the plants protected?

q does anyone know what this is
q does anyone know what this is
  7 answers