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Conference pear tree problem

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Question from Mrs Lorna Dyter

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I have a conference pear tree which has a large number of leaves on it with almost like light coloured blisters on the leaves. The leaves are still intact but this seems to have affected small parts of a large number of leaves on the tree.
Is this a disease or larva which is affecting the tree?
Is it best to remove the damaged leaves or leave them alone?
Is there anything that the tree should be sprayed with to help with this?
Please advise me.

Conference pear tree problem (18/05/2013)Conference pear tree problem (18/05/2013)Conference pear tree problem (18/05/2013)

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  • Views: 3431
  • Replies: 2
  • Posted: Sat. 18th May 2013 10:23

Re: Conference pear tree problem

Reply from Sue Bell

Hi Lorna,
This could possibly be damage from pear blister mite. A quick 'Google' will bring up lots of pictures looking just like your leaves. The RHS have a page on it here.
It seems there is no chemical control. You can remove the affected leaves if there aren't many, but if it's wide spread you just have to live with it as removing too many leaves will weaken the tree.
The good news is that it won't affect the fruit, so try to ignore it.

  • Posted: Sun. 2nd June 2013 14:02

Re: Conference pear tree problem

Reply from Kathy C

Hi, Mrs. Dyter,
Around late October, the female mites are actively moving about the twigs and leaves as they search for bud scales in which to overwinter. Starting in early to mid-October, you can use horticultural oil, insecticidal soap, or a general purpose garden insecticide spray to help decrease the population. As Sue correctly stated, there are no pesticides specific to pear blister mite presently available in the UK, but general pesticides, soaps, or oils available to the home gardener can help.
Best of luck,
Kathy C

  • Posted: Tue. 4th June 2013 16:15