[NAFEX] Cedar Apple Rust
loneroc at mwt.net
Sat Aug 13 08:02:06 EDT 2005
I have similar levels of infection on certain trees here in SW Wisconsin (a
lesion or two on each leave on a good proportion of leaves) and notice no
problems. I get no defoliation from CAR so I don't worry. I never treat
for it. If you look at spray recommendations, CAR is not touched by Captan
for example. You have to go for Maneb (scary--read the label) or one of the
expensive systemics (Polyram).
CAR seems to be the biggest problem in certain parts of the mid-South but
I'm sure folks there will weigh in on that. I don't know of an organic
control. Michael Phillips says sulfur, but whether that would work under
high disease pressure.
Steve Herje, SWWI
----- Original Message -----
From: "Ginda Fisher" <list at ginda.us>
To: "NAFEX" <nafex at lists.ibiblio.org>
Sent: Friday, August 12, 2005 5:59 AM
Subject: [NAFEX] Cedar Apple Rust
> How serious a problem is cedar apple rust? I have a few young apple
> trees, and I noticed that several of the leaves of all but one of
> them have a CAR lesion. Between deer and winter moths, these trees
> have more serious problems (I think) but they don't have many leaves
> in total, so "several" means maybe 1 leaf in 5, or one in 10.
> How serious a burden to the tree is this level of infection? Please
> don't reply with a list of CAR-resistant trees. My question is about
> how important it is for me to treat these ones. (If I only grew
> apples resistant to everything, I'd have very little choice, and most
> if it could be purchased at my local seasonal fruit stand.)
> This year seems like it might be better than last, I think the
> Jonathan last year had infections on at least a quarter of its
> leaves, and this year it can't be more than 1 in 8. (Most of the
> others are new since last year.)
> Ginda Fisher
> eastern MA, zone 6
> nafex mailing list
> nafex at lists.ibiblio.org
> **YOU MUST BE SUBSCRIBED TO POST!**
> All other messages are discarded.
> No exceptions.
> To subscribe or unsubscribe, go to the bottom of this page (also can be
used to change other email options):
> File attachments are NOT stripped by this list
> TAKE STEPS TO PROTECT YOURSELF FROM COMPUTER VIRUSES!
> Please do not send binary files.
> Use plain text ONLY in emails!
> Message archives are here:
> NAFEX web site: http://www.nafex.org/
More information about the nafex