Question
my azalia has a disease which turns healthy leaves into leaves which swell up into thick cream, turning to brown,succulent distorted leaf. can you help? chas

Answer
The azalea has leaf gall, which is a fungal disease.  The fungus transforms the leaves into the cream colored distorted galls that you see.  The disease is usually harmless to the plant but can make it look quite bad.  Control is to either pick off the galls by hand and discard in the trash.  Fungicides can be applied but only in the early growing season when buds begin to break.  Any all purpose fungicide will help prevent the disease.  I hope this helps.  Good Luck.