Explanation

The codling moth (Cydia pomonella) primarily attacks apples and pears, but is most famously known as a major pest of apples. However, in many agricultural contexts, it is also a significant pest of grapes (causing fruit rot). Given the options, grapes are a valid target, but apples remain the primary host. Wait, codling moth is specifically associated with apples. Let me double-check. Codling moth larvae bore into apple fruits. It is not typically a major pest of grapes. Grapes have different pests like grape berry moth. Therefore, Apple is correct.