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pear tree leaf disease?
Posted: Mon Jul 21, 2008 3:42 pm
by retropants
does anyone know what this might be?
Posted: Mon Jul 21, 2008 4:40 pm
by oldherbaceous
Dear Retropants, the only thing i can think of is Pear leaf blister mite, but i'm not convinced it is this.
Maybe someone else can say yes or no.
Posted: Mon Jul 21, 2008 4:44 pm
by oldherbaceous
It could also be Pear scab.
Posted: Mon Jul 21, 2008 5:03 pm
by retropants
thankyou ever so, OH. I'll look them up and see what I can find.....RP
Posted: Wed Jul 23, 2008 1:20 pm
by bstendel
Looks like Pear trellis rust (European pear rust)- Gymnosporangium fuscum. I live in Toronto, Canada and until recently it didn't exist here (it was only in a few spots on the west coast of Canada and California. As I have just recently moved into a home with a pear tree in the yard I was looking forward to eating its fruit in a few weeks. But then I noticed this blight on the leaves and have no idea what can be done or what the effect will be on the tree and its fruit.
Posted: Fri Jul 25, 2008 12:57 pm
by retropants
I have come to the same conclusion. Don't know what to do about it either.....
Should I remove and burn the affected leaves do you think?
Posted: Fri Jul 25, 2008 1:17 pm
by oldherbaceous
Dear Retropants, i think it would be a good idea to pick the affected leaves off and burn them.
Posted: Fri Jul 25, 2008 4:25 pm
by retropants
thankyou
Posted: Sat Jul 26, 2008 9:30 am
by daylily
Hi, Retro!
I have very similar on my pear tree. Unfortunately, my clever book says real control is only achieved if there are no Junipers in the vicinity as this is a two hosts pathogen.
See also:
http://www.omafra.gov.on.ca/english/crops/hort/news/hortmatt/2007/23hrt07a2.htm
Good luck!
Posted: Thu Jul 31, 2008 11:57 am
by retropants
thanks daylilly. I read that too, I don't think there are any nearby. I have removed all the affected leaves from both trees.
Posted: Thu Jul 31, 2008 9:56 pm
by Lyn
Hi - I had this "blight" on both my pear trees last year, for the first time - the fiery yellow spots were on every leaf so it was therefore not feasible to remove affected leaves. It did not affect the crop of pears, however, which were quite o.k. The spots eventually developed into powdery blisters about the size of a 5p piece, and when the leaves fell in the autumn I collected them up and burnt them. This year the trees are perfectly OK, without any sign of yellow spots, and a decent crop of pears forming. So I wouldn't worry too much, but it is probably wise not to let any affected leaves lie around on the ground.