Can anyone help me. I have an orange and satsuma tree (and lemon and lime) in our conservatory. They are all 4 years old and the 2 orange/satsuma trees have different diseases. I have photos but don't know where to post them. The orange tree has like White foam on the bark (like water droplets) and brown bits in it. Not really on the leaves. The satsuma has black like bugs on the leaves not really on the bark/stems. I can email photos. Can anyone help and with what as don't want to chuck them. The lemon and lime trees are so far unaffected.