North American Fruit Explorers mailing list at ibiblio

[Ginda Fisher <list@ginda.us>]

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.)

Thanks,
Ginda Fisher
eastern MA, zone 6