The fruit moth is a pest that affects not only apple trees or apples. Also pear and quince as well as stone fruit, figs and walnuts are colonized by the pest. The females lay eggs, from which the caterpillars hatch. The gluttonous animals then unobtrusively make use of the shell of the apple right down to the pulp.
To give the codler no chance, wrap a wide strip of corrugated cardboard around the tree trunk. The space in the corrugated board is used by the fruit mats as lodging for laying eggs. At the end of July you can remove the cardboard again and dispose of it together with codling moth.
On fruit trees, however, there are far more pests than those mentioned here. Animals such as the leaf flea, the gallmidge, the hazelnut drill and the raspberry beetle also cause damage.