Help Identifying a Tree and also a possible disease . . .

I have recently moved house and have the tree in the first pic below in my back garden.

First question is what type of tree is it??? I'm not particularly green fingered, and this is the first house where I have any garden to look after (and I can't wait to get started planting ! ).

Secondly - some of the leaves look as shown in the second two pictures

Can anyone tell me what is wrong with the tree? Is there anything that I can do for it, and to stop it spreading (as there are two more trees in close proximity.

Any help would be greatly appreciated, even if it's just being pointed in the right direction to look.

thanks in advance
dan

 

Looks like a pear.

 

Those holes are possibly caused by Pear Slug, which are in fact caterpillars of a type of sawfly. They look sort of like slugs and are covered with a mucus.

These have been attacking my quince, and the tree is small enough that I can pick them off one by one, but as trees get bigger this will become nigh-on impossible as there'll be too many leaves to sort through.

I believe Dipel will kill these off, which is a biodegradable agent. The slugs really only inhabit the top surfaces of leaves, so they're pretty easy to spot.

 

Orchard pear.

 

Chomp--my pear gets similar black spots on leaves, and they seem to be scab. This is the same fungus that makes black spots on the fruits (not sure if yours has fruit or is just an ornamental flowering type). My Bosc is especially plagued by this, very discouraging in our wet spring climate.

If you don't see any insects/'slugs' as mentioned previously, you might search for scab and see if it's a match.

Sulfur sprays after spring rains can limit this, I believe copper sprays also achieve some control, but most of the infection is probably already done. Preventive stuff is usually more effective than curing an existing infestation...