[Apple-Crop] Timing of foliar nitrogen in peach

[Harold Larsen]

Mark,

We time our fall applications of urea here in western Colorado for just 
before leaf fall (just as the leaves are starting to turn from green).  
That way the N gets into the buds and leaf burn is no longer an issue.

Best of luck on that.

Harold L.

-- 
Dr. Harold Larsen
Professor Emeritus (Fruit Pathologist)
Colo. St. Univ., WCRC
3168  B  1/2  Road
Grand Junction, CO  81503-9621
EMail:  Harold.Larsen at Colostate.edu
Cell phone:  (970)314-5610


On 9/10/2017 10:46 AM, Mark Angermayer wrote:
> I've read foliar urea in fall can increase hardiness and delay bloom
> on peach.
>
> Can anyone tell me the optimum time to apply foliar urea (100 lbs./ac
> -  i.e. 50 lbs. actual N) on peach?  I'd like to use regular soil urea
> (vs. the low biuret) because of cost, but understand soil urea will
> burn the foliage.
>
> I don't want to apply it too early so as to minimize photosynthesis
> from premature leaf drop, but don't want to apply it too late so the
> leaves won't absorb the N.
>
> U of C says to apply it in Sept. or Oct. (not Nov.) but the climate
> out there is quite a bit different than here.
>
> Anyone have a good general guideline to go by (i.e. just before leaf
> drop, two weeks before leaf drop, etc.)?
>
> http://ucanr.edu/sites/fruitreport/Nutrition_-_Fertilization/Individual_Nutrients/Nitrogen/Foliar_Urea/
>
> http://ucanr.edu/sites/fruitreport/files/162635.pdf
>
> Thanks,
> Mark Angermayer
> Tubby Fruits Peach Orchard
> KS/MO
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