乐动体育注册

Cultivars and Rootstocks

Information on cultivars and rootstocks for various fruit crops, including apples, peaches, strawberries and grapes. Tips on maturity assessments and bark grafting, bench grafting and budding in the orchard.
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Keep root pruning to a minimum. Photo: Rob Crassweller, Penn State
Spring Planting of Fruit Trees - Articles Articles

Spring Planting of Fruit Trees

Robert Crassweller, Ph.D.

Early planting promotes root development before there is any shoot growth. More
Peach Breeding to Improve Fruit Quality
Peach Breeding to Improve Fruit Quality - Articles Articles
The peach probably originated in China and the oldest archaeological records for peach are more than 7000 years old. Recently fossil peach pits from the late Pliocene strata were discovered in southwestern China (Su et al. 2015). 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
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
Orchard Management: Cultivars, Rootstocks, and Training Systems
Orchard Management: Cultivars, Rootstocks, and Training Systems - Online Courses Online Courses
$119.00
This course is designed for beginning and next-generation commercial tree fruit growers. Learn how to select cultivars and rootstocks and how to plan your training and support systems. More
Trees trained to a tall spindle system are commonly grown on M.9 rootstock, although new rootstocks are on the horizon.
Apple Rootstocks: Capabilities and Limitations - Articles Articles

Apple Rootstocks: Capabilities and Limitations

乐动体育注册 Robert Crassweller, Ph.D., James Schupp, Ph.D.

Penn State participates in multi-state apple rootstock trials, such the NC-140 rootstock project. The following rootstock descriptions and comments are based on results from these trials. More
Goldrush has a long growing season and is an excellent late-season cultivar for south-central Pennsylvania.
Apple Cultivars: Scab Resistance Selections - Articles Articles

Apple Cultivars: Scab Resistance Selections

Robert Crassweller, Ph.D.

Disease resistant cultivars were developed primarily for resistance to apple scab, but some are also resistant to cedar apple rust, powdery mildew, and fire blight. 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
‘Mayflower’ (East Malling, U.K.) is a mid-late season variety. Photo: Kathy Demchak, Penn State
Strawberry Variety Update – Fall 2017 - News News
It’s that time of year when we start thinking about putting together plant orders for next season. More
Pink Lady is a late season cultivar that, in some regions, may not reach full maturity before freezing temperatures occur. Before setting out large plantings of a new strain or cultivar, always plant a few trees on a trial basis.
Apple Cultivars - Articles Articles

Apple Cultivars

Robert Crassweller, Ph.D.

Before setting out large plantings of a new strain or cultivar, always plant a few trees on a trial basis. 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
Photo: Rich Marini
Strawberry Cultivars - An Historical View - Articles Articles

Strawberry Cultivars - An Historical View

乐动体育注册 Rich Marini, Ph.D.

Do you think older strawberry cultivars tasted better than the newer cultivars? More
Crimson® Topaz, top left; Luna, top right; WineCrisp™, lower left; Sirius, lower right. Photos by R. Crassweller.
Apple Cultivars - Newer Scab Resistant Selections - Articles Articles

Apple Cultivars - Newer Scab Resistant Selections

乐动体育注册 Robert Crassweller, Ph.D.

Resistance to apple scab has been a long term goal of some breeding programs. The four cultivars mentioned here all have resistance to apple scab from the Vf gene. More
Apple Cultivar Photo Gallery
Apple Cultivar Photo Gallery - Articles Articles
Photos of various apple varieties grown in Pennsylvania. More
'Malwina' fruit sprouting leaves. Photo: Kathy Demchak
Strawberry Cultivars for Matted-Rows - Articles Articles
We collected data on performance of sixteen cultivars or advanced selections of strawberries in the second harvest year of a matted-row trial. Some were great, and others had a few issues. More
USDA, university and private breeding programs have produced a number of new peach and nectarine cultivars in recent years.
Peach Cultivars - Articles Articles

Peach Cultivars

Robert Crassweller, Ph.D.

Peaches and nectarines are the second most important tree fruit crop grown in Pennsylvania. There has been and continues to be extensive breeding of new and improved cultivars. More
NJ 9-2-1 (trialed as NJ 3) was a high-yielding and excellent flavored variety but the berry shape is not typical. Photo: Tim Elkner
Strawberry Cultivars for Plasticulture - Articles Articles

Strawberry Cultivars for Plasticulture

Kathy Demchak, Timothy Elkner

We collected data on performance of strawberry cultivars in the second harvest year of a plasticulture planting. More
Apple Rootstocks for High Density Orchards
Apple Rootstocks for High Density Orchards - Videos Videos

Apple Rootstocks for High Density Orchards

Robert Crassweller, Ph.D., Tara Baugher, Michael Basedow

9:53

Commercial fruit growers are transitioning their apple orchards to high density production systems, and this is possible due to the availability of size-controlling apple rootstocks. More
Blush and ground color changes as fruit mature. Photo: Brianne Redman
Assessing Apple Fruit Maturity in 2017 - News News
This is the second year of a grower-funded project to routinely assess fruit starch levels, ground color, and other maturity indices. More
Manzanas para venta al por menor
Manzanas para venta al por menor - Videos Videos

Manzanas para venta al por menor

乐动体育注册 Robert Crassweller, Ph.D., Montserrat Fonseca Estrada, Michael Basedow

11:56

En este video, hablaremos acerca de los cultivos de manzana que tienen las caracteristicas necesarias para operaciones de mercados al por menor. More
Apple Cultivars for the Wholesale Market
Apple Cultivars for the Wholesale Market - Videos Videos

Apple Cultivars for the Wholesale Market

乐动体育注册 Robert Crassweller, Ph.D., Tara Baugher, Michael Basedow

7:21

To keep up with consumers’ changing tastes, growers should routinely replant orchard blocks with new apple cultivars. More
Apple Cultivars for the Retail Market
Apple Cultivars for the Retail Market - Videos Videos

Apple Cultivars for the Retail Market

乐动体育注册 Robert Crassweller, Ph.D., Tara Baugher, Michael Basedow

8:24

The following apples are excellent choices for retail markets. These include well-known cultivars, and some less familiar apples with characteristics that will help them stand out in the farm stand. More
Injerto inglés o de lengüeta
Injerto inglés o de lengüeta - Videos Videos

Injerto inglés o de lengüeta

Montserrat Fonseca Estrada, Robert Crassweller, Ph.D., Michael Basedow

8:24

¿Tiene un árbol antiguo en el que le gustaría injertar una variedad moderna con raíces más pequeñas? More
Injerto de Corona o Corteza
Injerto de Corona o Corteza - Videos Videos

Injerto de Corona o Corteza

Montserrat Fonseca Estrada, James Schupp, Ph.D., Michael Basedow

8:28

Conforme los consumidores cambian sus preferencias por las manzanas que más disfrutan, los productores pueden convertir porciones de sus huertos a estos nuevos cultivares. More
G.935 is replant tolerant, but is susceptible to some latent viruses, highlighting the importance of choosing rootstocks that best fit your own unique orchard conditions. Photo by Rob Crassweller
Apple Rootstocks on the Horizon - Articles Articles

Apple Rootstocks on the Horizon

乐动体育注册 Rich Marini, Ph.D.

I spent most of the summer writing a review paper on apple rootstocks and came across information that might be of interest to commercial fruit growers. More
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