You have a bad scale insect infestation and perhaps spider mites, as well.

I take it that you are not familiar with scale insects? The population appears to be pretty advanced.

No not familiar with scale insects at all! Can I cure problem with regular houseplant insecticide?

Here are some pages with info on Scale insects and their control. Note the list of products mentioned on the bottom of the first webpage.

http://www.planetnatural.com/site/xdpy/kb/scale-control.html

http://edis.ifas.ufl.edu/MG005

http://www.rhs.org.uk/advice/profiles0801/scale.asp

I hope those help.