I've recently bought a house in the Auvergne region of France (South central) which is about 30 years old and that has the good fortune to have several mature fruit trees in the garden (cherry, apple, pear and apricot). All these species are in the same part of the garden so have similar aspects/exposures (lots of sun throughout the entire day) and presumably similar soil and drainage.
However, whilst my cherry crop was fine and I can see no problems with the other fruits still on the tree, most of my apricots have these kind of black-brown spots all over them:
Though the spots don't seem to make any difference to the flavour of the fruit and the texture is unchanged apart from the skin being slightly harder where the spots are. What may be different is that I've noticed that the affected fruit tend to be more prone to rotting on the tree, and many of the fruit that have fallen from the tree are mouldy.
Any suggestions to what might be causing this and how I may eliminate the problem in future years?