olive trees and yellow leaves

[Gabrielle R]

Hi there everyone I wonder if anyone else has olive trees and whether you've got the problem I'm having with the leaves starting to yellow (with a few dark spots on them) and fall off. Not all the leaves but a small %. I've sprayed with copper hydroxide which is supposed to help control humidity related problems, but maybe did that too late cos there are still problems! Also would be interested in any organic solutions to this?? Any suggestions? Gabrielle