I’m only familiar with the 20th Century and Chojuro varieties but they filled 
in a 8’ x 14’ planting nicely. I guess the grower could always cut out every 
other tree if it gets too hard to keep them in their space.

Bill Fleming
Montana State University
Western Ag Research Center
580 Quast Lane
Corvallis, MT 59828

From: [email protected] 
[mailto:[email protected]] On Behalf Of Weinzierl, Richard A
Sent: Friday, August 01, 2014 8:13 AM
To: Apple-crop discussion list
Subject: [apple-crop] Planting density for Asian pears

A new grower bought an Asian pear orchard that was planted a few years ago 
north of Peoria, IL.  Except for pollenizers, it’s all ‘Shinko’, and apparently 
its resistance to fireblight is very good – I saw only one or two infections in 
hundreds of trees.

They have planted trees at very high density (4 feet in-row by 12 feet between 
rows); the trees are at least 12 feet tall.  Is anyone familiar high-density 
production of Asian pears?  And if so, do you have any pruning recommendations? 
 It’s obvious the density and prior pruning practices will not work together.

The fact sheets and similar references that I’ve seen suggest much lower tree 
densities (218 to 242 trees per acre).

Any general thoughts on managing the trees at high density  … and what spacing 
would you recommend for the additional plantings they intend to make?

Rick Weinzierl

Professor and Extension Entomologist
IL SARE PDP Coordinator
Department of Crop Sciences, University of Illinois
S-334 Turner Hall, 1102 S. Goodwin Avenue
Urbana, IL 61801
217-244-2126


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