North American Fruit Explorers mailing list at ibiblio

[Road's End Farm <organic87@frontiernet.net>]

On Jun 20, 2011, at 7:52 PM, Randy Burd wrote:

> To all,
>
> I have noticed leaves on some of my apple trees that turn yellow and  
> then
> fall off. I found a picture on the Web that makes me think that the  
> disease
> is necrotic leaf blotch.
>
> Does anyone have an organic solution?

Apparently not exactly a disease, in that it seems to be caused by the  
weather, not by an organism. The PDF that's the first link on this page

http://www.google.com/search?client=safari&rls=en&q=%22necrotic+leaf+blotch%22+%22organic+control%22&ie=UTF-8&oe=UTF-8

says that it's a "Physiological disorder caused by alternating wet and  
dry periods.  Yellow leaves or blotches.  Can cause leaf drop. Could  
be remedied by spraying Zinc.  Golden delicious is most susceptible."




-- Rivka; Finger Lakes NY, Zone 5 mostly
Fresh-market organic produce, small scale