Hi! My name is Michael! I live on the Central coast! I have a peach tree about 2m tall with no obvious signs of disease. Up until
yesterday the tree looked very healthy! Just overnight the tips are wilting and the leaves are falling off! We have had a lot of rain the last week! Might that be a problem? Thankyou?
If mine I would prune out the infected tips in order to limit further spore dispersal to healthy foliage. And I would use a biological fungicide as a preventive barrier for further infection.
As a California arborist I don't know your local resources, but Double Nickel Bio-fungicide-bactericide from Certis USA is a good one if you can get it. Or something similar.
Sorry, my answer was distorted and sent prematurely.
It should have said that from your description of the conditions, I suspect a fungal leaf disease as a result of rain/wind transmission of spores.
It appears as if "peach leaf curl", but lacks the characteristic red-orange discoloration, so it may be another disease.
From the photo and your descriastion of a heavy rainy period, I suspect a fungal leaf disee pdue to spore transmission with the wet conditions.