Looks like a cottony cushion scale infestation to me. Also on the leaf in the background I see some brown scale along the center of the leaf. Those white and brown spots are actually the pest, and they secrete that sappy sticky fluid as they consume the liquids from your tree. If its a light infestation and you have a pretty small tree just take a cotton ball soaked in isopropyl alcohol and lightly brush it on the infested spots. The scale will let go instantly and die from the alcohol.

Otherwise you can use neem oil to control, some people are using rosemary oil now too, with reportedly good results. Do a search on the forum for scale and you should get some better pointers.

-Mike B

I just spent an hour with a mixture of 1/2 tsp of dish detergent mixed into 1 quart of lukewarm water and washed each and every leaf on top and bottom looking for scale and eradicating it as I saw it. I then sprayed it with Safer Insecticidal soap. I am hoping this will control it but I will keep a close eye on it for a while.

Sounds like you got it under control! You might have to go back to it every few days with the soap, just be on the lookout for new scale, those buggers have a tendency to stick around for a few weeks after the first treatment.