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Guidelines for Producing Unpasteurized Cider in Pennsylvania
Guidelines for Producing Unpasteurized Cider in Pennsylvania - Articles Articles

Guidelines for Producing Unpasteurized Cider in Pennsylvania

Luke LaBorde, Ph.D., Robert Crassweller, Ph.D.

This publication explains how to follow established food safety and sanitation standards that minimize the risk for contamination. More
Los medios de las hileras podados cuidadosamente facilitan ver a los depredadores y atrapar roedores. Foto: Rob Crassweller
MIP – Prácticas de Manejo en la Postcosecha - Articles Articles
Después de completar la cosecha, tómese el tiempo para el manejo estratégico de las malezas, la vida silvestre y los niveles de nutrientes de los árboles. 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., Robert Crassweller, Ph.D., Chris Walsh

There are many factors that affect Honeycrisp storage behavior, and some occur during harvest. More
Manejo de Vida Salvaje en la Huerta-Roedores
Manejo de Vida Salvaje en la Huerta-Roedores - Articles Articles

Manejo de Vida Salvaje en la Huerta-Roedores

Robert Crassweller, Ph.D., Tara Baugher

Las poblaciones de roedores muestran fluctuaciones distintivas de la población de aproximadamente 4 ciclos anuales. More
Bitter pit showing up on apples at harvest.
Preharvest Assessment of the Potential for Bitter Pit in Honeycrisp - News News
This article describes a new test methodology that is available for growers that are interested in trying to predict the potential for a lot of fruit to develop bitter pit in storage. More
Excessive vigor from high nitrogen applications. Photo: Rob Crassweller, Penn State
Orchard Nutrition: How Do You Know What Fertilizers You Need? - News News
We are now into the main portion of the growing season for our tree fruits and over the hump of the early season pests and disease problems. Therefore, you can relax until harvest – right? More
Figure 1. Delicious fruit size on June 4, 2018 at Rock Springs, PA. Photo: Rob Crassweller, Penn State
Last Carbohydrate Model Run for 2018 - News News
As of June 11, 2018, most areas of the state are now at or beyond 30 days after reported full bloom. More
Carbohydrate Model Run - June 4 2018
Carbohydrate Model Run - June 4 2018 - News News
The high temperatures experienced in most of Pennsylvania last week were relieved Saturday into Sunday as rain moved across the state. More
Discoloration of developing fruitlets indicating they will be dropping. Photo: Rob Crassweller, Penn State
Carbohydrate Model Run: May 30, 2018 Ideal Weather for Thinning - News News
Since the last carbohydrate model report on May 25, last Friday, weather conditions were optimal to induce fruit drop due to chemical thinner application. More
Cornell Carbohydrate Model Run: May 25, 2018
Cornell Carbohydrate Model Run: May 25, 2018 - News News
Warm temperatures are affecting thinning. Most stations across the state are forecasting high temperatures to be in the 80’s today and for the next several days. More
M27 trees in bloom. Photo: Rob Crassweller, Penn State
Cornell Carbohydrate Model Run: May 21, 2018 - News News
Saturday in central Pennsylvania was overcast all day with early morning rain followed by rain on Sunday morning and then sun in the afternoon. More
Photo: Rob Crassweller, Penn State
Carbohydrate Model Run: May 18, 2018 Thinning Weather Has Changed - News News
We finished our May twilight meetings yesterday with the meeting in North East, PA. Beginning on Tuesday of this week most of our travel weather was overcast with much heavy rain. More
Carbohydrate Model Run: Thinning Time is Here!
Carbohydrate Model Run: Thinning Time is Here! - News News
It looks like spring finally arrived in the last two weeks and many orchards are thinning apples. More
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NEWA Off-Hours Incident Reporting - News News
The recent launch of our Network for Environment and Weather Applications (NEWA) Help Desk isn’t simply a way to send us an email or casual message. More
Empire buds. Photo: Rob Crassweller, Penn State.
Carbohydrate Model Update: April 24, 2018 - News News
As I prepare this note on the status of the carbohydrate model results, we still have two sites that have not reached green tip (GT). More
April 2 snow at Rock Springs. Photo: Rob Crassweller, Penn State
NEWA IPM Monitoring Available for Growers - News News
Funding from the SHAP Extension Committee has purchased a statewide membership to the NEWA IPM Monitoring system for 2018. More
Ambrosia fruit. Photo: R. Crassweller, Penn State
Orchard Nutrition: Determining Orchard Fertility Needs - Articles Articles
The Mid-Atlantic region is blessed with an abundant supply of good fertile soils that can produce high quality deciduous fruit. More
The nearer the pollinizer to the producing tree, the better distribution by the bees of pollen to all blossoms. Crabapples are often used as pollinizers.
Orchard Pollination: Pollinizers, Pollinators and Weather - Articles Articles
Pollination involves the integration of several biological and physical factors, including cultivar compatibility, synchronous blooming, insects, and proper weather conditions. 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

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
In high-density systems excessive growth is discouraged, and instead of a large, strong framework, a weak-framed tree is desirable. To achieve these ends in a system such as tall spindle, very little pruning is done in early years.
Orchard Production Systems: Selection Considerations - Articles Articles
Factors affecting an orchard production system include cost, spacing, plantsmanship, and labor. 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
Nitrogen deficiency symptoms on peach, which can be prevented by leaf analysis and block-specific fertilization.
Orchard Nutrition: An Overview - Articles Articles

Orchard Nutrition: An Overview

Robert Crassweller, Ph.D.

Nutritional requirements of fruit trees differ from those of agronomic crops, cover crops, and orchard sod. More
Collect mid-shoot leaves on current season’s growth.
Orchard Nutrition - Sample for Foliar Analysis Mid-July to August - Articles Articles
Plant tissue analysis is used to directly measure the amount of nutrients in fruit trees, and for established perennial crops, is usually a better indicator of nutrient status than a soil test. More
Tyvek® tree guard. Photo: Rob Crassweller
Orchard Weed Control - Protection of Tree Trunks - Articles Articles
Some of the burn-down herbicides have been implicated as possible causes of damage to young tree trunks that have green tissue on portions of the lower trunk. 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
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