Codling moth. Codling moth larvae are an important pest of apple trees and to some extent pear trees. The female adult moth lays eggs on apple fruitlets in late spring, and the resulting larvae burrow into the developing apples. They damage the inside of the apple.
Keep on giving it Haircuts and it'll evolve eventually. Eevee can evolve into an Umbreon at and between the levels 2-99. It needs at least 220 Happiness points but from what you said earlier (trusts you), it means that your very close to reaching that level. Makes sure that you level it up so that it evolves. If you don't level it up, then it won't evolve.
Eeve requires maximum friendship to evolve to Espeon and Umbreon. If you do so and level up Eevee at daytime, it will evolve to Espeon. And if you do so and level up Eevee at nighttime, it will evolve to Umbreon. Note that day-night timings are fixed but vary between games. In Gen2 and Gen4 games, daytime is 4AM to 5:59PM and 7:59PM respectively, rest being night; and in Gen3, day lasts from noon to midnight.