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Photo: Rich Marini, Penn State
Can Peach Consumption be Increased? - Articles Articles
According to USDA statistics, in 2016 California was the leading free-stone peach producing state with 247,000 tons. More
Apple rootstock in tissue culture: Photo by Yongjian Chang, North American Plants Inc.
Advances in Rootstock Genetics and Breeding - Articles Articles
Developing new fruit rootstocks and cultivars using traditional breeding techniques is a slow process because a new rootstock must have many desirable characteristics without many undesirable traits. More
Soggy breakdown on Honeycrisp 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., Robert Crassweller, Ph.D., Chris Walsh

There are many factors that affect Honeycrisp storage behavior, and some occur during harvest. More
Dr. Rob Crassweller, second from right, organizes an apple variety sampling. Photo: Tara Baugher, Penn State
Apple Variety Improvement: A Look at the Past, Present and Future - Articles Articles
During the 2018 Mid-Atlantic Fruit and Vegetable Conference, Dr. Rob Crassweller organized an apple variety showcase. More
Photo: Sladjana Prozo
Fruit Disorders: New Tool to Assess the Potential for Bitter Pit in Honeycrisp - Articles Articles
Bitter pit severity varies with cultivar and season, but Honeycrisp is particularly susceptible. Penn State has developed a new model for predicting bitter pit potential. More
Top dominant trees in an older orchard. Photo: Rob Crasswellar, Penn State
Home Gardening: Pruning to Renovate Old Fruit Trees - Articles Articles

Home Gardening: Pruning to Renovate Old Fruit Trees

Robert Crassweller, Ph.D., Rich Marini, Ph.D., Tara Baugher, Timothy Elkner

Use judicious pruning to renovate older fruit trees in your home landscape. More
'Golden Delicious' on MM.111 rootstock and a 12" M.9 interstem in one of Roy Simons' trials at Illinois. Photo: Rich Marini, Penn State
Apple Rootstocks: Interstem Apple Trees Revisited - Articles Articles
Some growers are considering interstem trees as a way to avoid some of the problems experienced with the more common dwarfing rootstocks. More
PROmoting School-community-university Partnerships to Enhance Resilience
PROmoting School-community-university Partnerships to Enhance Resilience - Articles Articles

PROmoting School-community-university Partnerships to Enhance Resilience

Daniel Francis Perkins, Ph.D., Janet Agnes Welsh, Ph.D., Claudia Mincemoyer, Ph.D.

This flyer describes the PROSPER program, which brings evidence-based prevention programs to schools and communities to strengthen families, build youth skills, and reduce problem behaviors in youth. More
Parents Making Youth Sports a Positive Experience: Spectators
Parents Making Youth Sports a Positive Experience: Spectators - Articles Articles
This publication is written to assist parents in fostering a positive climate that enables children and youth involved in sports to enjoy themselves and reach their full potential. More
Cold-injured primary blackberry bud (left) and uninjured secondary bud (right). Photo credit: Fumi Takeda, USDA-ARS-AFRS
Small Fruit Cold Hardiness - Winter Injury in Brambles - Articles Articles

Small Fruit Cold Hardiness - Winter Injury in Brambles

Rich Marini, Ph.D., Kathy Demchak

Weather is also becoming more variable resulting in early-winter cold snaps and winter thaws followed by extreme cold events. More
Summer shearing of peach trees can reduce fruit size and soluble solids, but if vigorous vegetative shoots that shade the tree interior are removed by hand pruning by early July, quality shoots in the tree interior can be maintained.
Fruit Tree Pruning - Summer Pruning Cautions - Articles Articles
Summer pruning is a vague term and simply refers to the time of year pruning is performed (when trees have foliage) and does not describe the type of pruning cuts. More
Photo: Tara Baugher
Fruit Color - Promoting Red Color Development in Apple - Articles Articles
Fruit surface color is complex due to genetics and mutations, environmental factors, crop load, plant nutrition, plant stresses, and plant growth regulators. More
Fruit Harvest - Estimating Apple Yield and Fruit Size
Fruit Harvest - Estimating Apple Yield and Fruit Size - Articles Articles
Early-season yield and packout predictions are useful for growers and packers to plan for adequate harvest labor and storage space and to develop an orderly marketing plan. More
Tree Fruit Cold Hardiness - Effect of Pruning
Tree Fruit Cold Hardiness - Effect of Pruning - Articles Articles
When there is a sudden drop in temperature the trees most injured are those that lack adequate vigor, those that were too vigorous, and those that had been pruned before the cold event. 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
Tree Fruit Cold Hardiness - Pruning Peach Trees with No Crop
Tree Fruit Cold Hardiness - Pruning Peach Trees with No Crop - Articles Articles
Low winter temperatures and/or spring frosts sometimes result in the loss of the entire peach crop. Below are some considerations for managing trees with no crop. 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
Cross-sections of live (top) and dead (lower) peach flower buds showing cold injury. Photo by E. Winzeler.
Orchard Frost - Assessing Peach Bud Injury - Articles Articles
Most years some peach flower buds are damaged by winter cold or spring frost. More
Photo: Rich Marini
Strawberry Cultivars - An Historical View - Articles Articles
Do you think older strawberry cultivars tasted better than the newer cultivars? More
Parents Making Youth Sports a Positive Experience: Role Models
Parents Making Youth Sports a Positive Experience: Role Models - Articles Articles
This is the first in a two-part series written to assist parents in fostering a positive climate that enables children and youth involved in sports to enjoy themselves and reach their full potential. More
Understanding Adolescence 3: The Tasks
Understanding Adolescence 3: The Tasks - Articles Articles

Understanding Adolescence 3: The Tasks

Daniel Francis Perkins, Ph.D.

Adolescents have one foot in childhood and one foot in adulthood. This publication, the third in a three-part series, explores the developmental tasks adolescents must accomplish as they mature. More
4-H Youth Development Programs Work in Pennsylvania 4-H Youth Development Programs Work in Pennsylvania - Articles

4-H Youth Development Programs Work in Pennsylvania

Daniel Francis Perkins, Ph.D., Claudia Mincemoyer, Ph.D.

By helping youth develop critical life skills, fostering citizenship, and promoting leadership. More
Understanding Adolescence 2: Searching for Themselves
Understanding Adolescence 2: Searching for Themselves - Articles Articles
This publication, the second in a three-part series, explores the major questions adolescents face as they search for themselves. More
Bullying: What Educators Can Do About It
Bullying: What Educators Can Do About It - Articles Articles

Bullying: What Educators Can Do About It

Daniel Francis Perkins, Ph.D.

The focus of this publication is bullying at school. This resource was developed for elementary school teachers, and includes activities and tips to prevent or stop bullying. More
On-Farm Research III—Evaluating Relationships Between Variables
On-Farm Research III—Evaluating Relationships Between Variables - Articles Articles
Evaluating relationships between variables involves a statistical method called “regression analysis.” More
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