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Frost-induced russet also known as Frost Ring. Photo: Jim Schupp, Penn State
Apple Skin Disorders: Scarf Skin and Russet - Articles Articles
Scarf skin and russet are skin defects that can diminish the market value of fresh fruit. More
Peach Crop Load Management: Blossom Thinning and Fruit Size
Peach Crop Load Management: Blossom Thinning and Fruit Size - Articles Articles

Peach Crop Load Management: Blossom Thinning and Fruit Size

Tara Baugher, James Schupp, Ph.D., Paul Heinemann, Ph.D.

Many growers are hesitant to thin peaches at bloom because they fear the chance of bud loss to frost at this early stage of development. More
Quad V. Photo: Edwin Winzeler, Penn State
Peach Tree Pruning: Trials, Tribulations, and Looking to the Future - Articles Articles
The ideal peach training system would be productive and pedestrian, precocious and produce high quality, well-colored red fruits. More
Buckeye Gala/M. 9. Photo: Tara Baugher, Penn State
Apple PGRs - Shifting Harvest Window of Gala a Risk in Warmer Climates - Articles Articles

Apple PGRs - Shifting Harvest Window of Gala a Risk in Warmer Climates

James Schupp, Ph.D., Edwin Winzeler, Lynn Kime

Researchers in cooler regions have recommended the 2-pouch rate of ReTain be used to delay harvest by up to six weeks, but this was not possible in Southcentral PA in 2016. More
Bitter pit begins to show up on Honeycrisp several weeks before harvest and the incidence can increase two- to four-fold after a month in storage. Photo: Tara Baugher
Apple Fruit Disorders - Crop Load and Nutrient Management to Prevent Bitter Pit - Articles Articles

Apple Fruit Disorders - Crop Load and Nutrient Management to Prevent Bitter Pit

Tara Baugher, Rich Marini, Ph.D., James Schupp, Ph.D.

Multiple years of studies in grower orchards are providing additional clues for managing Honeycrisp in the orchard to prevent bitter pit following storage. More
Photo courtesy of PA Cider Guild.
Using Mid-Atlantic Processing Fruit in Hard Cider Production - Articles Articles
Exploring the potential for using Mid-Atlantic processing apple varieties in hard cider production. More
Photo: Tara Baugher
Fruit Tree Pruning - Mature Semi-Dwarf Apple Orchards - Articles Articles
Blocks of larger semi-dwarf trees at medium density still exist on many farms, and often these blocks still have a significant role to play in the orchard enterprise. More
Soggy breakdown on 2014 PA fruit. Photo courtesy of Yosef Al Shoffe, Cornell
Fruit Disorders - Harvest Practices to Prevent Storage Disorders in Honeycrisp - Articles Articles

Fruit Disorders - Harvest Practices to Prevent Storage Disorders in Honeycrisp

Tara Baugher, James Schupp, Ph.D., Rich Marini, Ph.D.

There are many factors that affect Honeycrisp storage behavior, and some occur during harvest. More
Pruning just before a cold snap increases susceptibility to injury.
Tree Fruit Cold Hardiness - Pruning Effects - Articles Articles

Tree Fruit Cold Hardiness - Pruning Effects

Rich Marini, Ph.D., James Schupp, Ph.D.

Fruit trees begin to go dormant in response to shortening day length in the fall. Exposure to freezing temperatures accelerates the onset of dormancy. More
An effective chemical thinning program is essential to obtaining adequate return bloom. It is also important to use return bloom sprays on apple cultivars that tend to be biennial.
Apple PGRs - Modifying Tree Growth and Increasing Return Bloom - Articles Articles
Plant growth regulators are useful tools for increasing branching, suppressing shoot growth (for example to manage fire blight), and increasing return bloom. More
Apple PGRs - Factors that Affect Performance in Orchards
Apple PGRs - Factors that Affect Performance in Orchards - Articles Articles
PGRs must be applied with adequate coverage, and then be absorbed and translocated to the site of activity in sufficient concentration to give the desired response. More
Apple Crop Load Management - A Hand-thinning Gauge
Apple Crop Load Management - A Hand-thinning Gauge - Articles Articles
The Equilifruit disc, developed in France, has potential as a hand-thinning gauge in tall spindle apple. More
Orchard Production Systems - Apple Blueprint
Orchard Production Systems - Apple Blueprint - Articles Articles

Orchard Production Systems - Apple Blueprint

James Schupp, Ph.D., Tara Baugher

Many cultural practices and pest control methods utilized in the past require abundant labor resources to be profitable, and these no longer exist in today’s agricultural community. More
Photo: Amy Tabb
Orchard Precision - Sensor Technologies and Weather Modeling - Articles Articles

Orchard Precision - Sensor Technologies and Weather Modeling

James Schupp, Ph.D., Tara Baugher, Robert Crassweller, Ph.D., Grzegorz (Greg) Krawczyk, Ph.D.

Sensor and imaging technologies, along with weather modeling, are being investigated for applications in intensive orchard systems. More
Renewal cuts; L: showing branch renewal after 1 year; R: newly cut.
Fruit Tree Pruning - A Rules-Based Approach - Articles Articles
With the advent of uniform narrow canopy training systems, the “artistry” of pruning can be phased out in favor of pruning to a few scientifically sound principals. More
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