I just purchased this pear tree about 1.5 weeks ago. It is an asian pear with four different types grafted onto one tree. Rootstock is OHXF333.

A week or so after planting it I noticed that it was covered in aphids. I sprayed all of the aphids off a few days ago and only saw one aphid on it today. I don't feel that explains the leaves, though. I feel like it may be suffocating, but even that doesn't seem to me to explain it all. I feel I may have overwatered it the first week, but I am currently trying to let is dry out a bit. I also just planted garlic around it to try and keep the aphids away.

Could it be planted too deep?

Anybody have any ideas about what I should do?

Sorry the pictures didn't turn out so great.

Thanks.