By Cammomile
west sussex,
United Kingdom 
My friend's Victoria plum tree is suffering from either pear scab or pear leaf blister mites - they have had to take off a large limb as it had more or less died and wonder what kind of chemical control (if there is one) they can use on the tree in the spring. All help gratefully received.
5 Aug, 2012
Answers
Looks sad doesn't it - my OH brought this home to show me after I had posted the question. It's been nibbled as well.
5 Aug, 2012
Have a look up of Bacterial canker, that causes leaves to go brown and have holes in them.
5 Aug, 2012
Thank you - I have downloaded some very helpful info and it looks to be the same.
6 Aug, 2012
Sad if it is, there is not a lot one can do about it. Victoria is very prone to this infection too.
6 Aug, 2012
Yes they inherited the tree and it must have been quite mature before that. Victoria plums are a favourite.
6 Aug, 2012
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Pear problems only attack pear trees. Can you put up a picture of the problems for identification purposes?
5 Aug, 2012