Re: [nafex] cedar apple rust

[Ginda Fisher <ginda@concentric.net>]

Having seen lots of pictures of CAR on the internet, I'm pretty sure
that's what I have on the crab, and to a lesser extent on the Jonathan. 
It's not very surprising, as junipers and their kin are a common
landscaping plant around here.  I went looking to see if my shrubs have
any visible CAR galls, and didn't find any.

1)  Would they be visible at this time of year?
2)  Is hand removing of fruiting bodies worth the effort?
3)  Is arborvitae a host?
4)  How about blue mat juniper?

I also have two unidentified junipery shrubs (neither with visible
galls). 

Two of my five closest neighbors have large, valuable hedges of
something that looks like cedar.  Two of the other three have shrubs
that look kinda like juniper as I peer at them.  Eradication of
juniper/red cedar in the neighborhood is not an option as there are
hundreds of neighbors within a 2 mile radius.  There are also seedling
crabs in every uncleared patch, so there will be a large untreated
reservoir for the fungus no matter what I do. . . So

1)  If levels of infestation seem low, is it important to treat?  (My
one edible apple in not a fruiting age.  Does this matter?)
2)  Can anyone point me to information on how to predict heavy infection
years, or otherwise determine when it's most important to treat.

Thanks,
Ginda

dwalsh/wchase wrote:
>
> Ginda,
>
> I thought someone more knowledgeable might answer by now.
>
> I wonder if you have cedar apple rust?
>
> I know pear rellis rust very well and I think your symptoms sound like they may be
> cedar apple rust.
>
> The russeting is probably due to cold weather soon after pollination ... or it
> could be due to sprays of some chemicals.
>
> Derry
>
> Derry Walsh & Bill Chase  email:  wchase@interchange.ubc.ca
> Aldergrove,  B. C.,  Canada
> phone/fax (604) 856-9316
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> Home web page  http://www.interchange.ubc.ca/wchase/HTML
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> -----
> :
> : 2)  My third tree has no problem with yellowing leaves.  It does,
> : however, have several leaves with a disease or insect.  From the top,
> : there is a brown spot ranging from 1/8 to 1/4 inch or so.  It is
> : surrounded by an orange and yellow donut, and the rest of the leaf looks
> : healthy and green.  I assumed it was some fungus, perhaps scab.  I just
> : noticed that on the bottom of some of the larger spots there is a
> : swelling of green tissue, with little fuzzy "hairs" emerging.  They are
> : up to 1/8 inch long, and look like the fuzzy structure that grow on some
> : insects in form (although they are clearly growing from the leaf, and
> : not an attached insect.  Does anyone know what this is?  A large
> : fraction of the apples (a small yellow seedling crab) seem to be heavily
> : russetted
> : Thanks,
> : Ginda Fisher
> : eastern Mass.  zone 6

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