I am a complete rookie when come to planting. However, a month ago, my girlfriend bought me a Dwarf Jade Bonzai from Lowes. For the past 2 weeks, it has been dropping leafs until it is almost bald now. I only water very little once a week. Today at the bottom of one of the leaf has weird looking "pimples". Is it some kind of pest or disease? Need help ASAP cause I think by this time tomorrow it will be leafless.
here is the pic: