Some of the leaves appear to be curling up and have a rusty colour. On one particular tree the new fruit bearing shoots are falling off and it seems that they have been eaten. What is the cause? What can I do to improve the situation? What would be the best treatment that I could use? Many thanks in anticipation.
Regular spray schedule can help with disease and pests on fruit trees.
These links have more information.
https://www.gardeningknowhow.com/edible/fruits/fegen/fruit-tree-spraying.htm
https://www.gardeningknowhow.com/edible/fruits/apples/apple-tree-diseases.htm