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Symptoms of potassium deficiency.
Assessing and Managing Potassium Concentration in the Vineyard - Articles Articles
Potassium (K) plays a critical role in many plant physiology and biochemistry processes such as photosynthesis, osmoregulation, and enzyme activation. More
Updated Insecticide Recommendations for Spotted Lanternfly on Tree Fruit
Updated Insecticide Recommendations for Spotted Lanternfly on Tree Fruit - Articles Articles
Insecticide recommendations for spotted lanternfly in tree fruit, updated August 2018. More
Spotted lanternfly feeding on grapevine. Image by Erica Smyers.
Updated Insecticide Recommendations for Spotted Lanternfly on Grape - Articles Articles
Insecticide recommendations for spotted lanternfly in grape, updated August 2018. More
Early peaches. Photo: Don Seifrit, Penn State
Peaches: Harvest and Postharvest Handling - Articles Articles
Peach cultivars have different markers of quality at harvest that determine readiness to be picked, but all cultivars should be harvested in a fashion that allows for the best taste and storability. More
Spotted Lanternfly Grape Pest Alert
Spotted Lanternfly Grape Pest Alert - Articles Articles

Spotted Lanternfly Grape Pest Alert

Heather L Leach, Michela Centinari, Ph.D.

This fact sheet provides identification, damage, quarantine, and management information for the spotted lanternfly, an invasive sap-feeding planthopper that feeds on the vine trunk, shoots, and leaves of grape plants, among other crops. More
Tree Fruit Team Outreach
Tree Fruit Team Outreach - Articles Articles

Tree Fruit Team Outreach

Tara Baugher

Team accomplishment report for 2017. More
Tree Fruit Insect and Mite Control Toolbox - Pesticide Resistance Management
Tree Fruit Insect and Mite Control Toolbox - Pesticide Resistance Management - Articles Articles
A number of insect and mite pests have developed varying levels of resistance to some insecticidal chemistries over the years, including the organophosphates, carbamates, and pyrethroids. More
Tree Fruit Disease Toolbox - Fungicide Resistance Management
Tree Fruit Disease Toolbox - Fungicide Resistance Management - Articles Articles
Resistance has sometimes resulted in pest-management-program failures. Below are presented tactics to help delay resistance to fungicides. More
Female spotted lanternfly and her egg mass. Photo: Emelie Swackhamer, Penn State
Tree Fruit Insect Pest - Spotted Lanternfly - Articles Articles

Tree Fruit Insect Pest - Spotted Lanternfly

Grzegorz (Greg) Krawczyk, Ph.D.

The spotted lanternfly, Lycorma delicatula, an invasive plant hopper was first detected in Pennsylvania in the fall of 2014. More
Tiny, black, spherical structures are produced on stalks above the white mold. Each of these contains thousands of spores that are released to float in the air. Photo by K. Peter.
Stone Fruit Disease - Rhizopus Rot - Articles Articles

Stone Fruit Disease - Rhizopus Rot

Kari A. Peter, Ph.D.

Rhizopus rot, caused by Rhizopus nigricans, can be very destructive to harvested fruit. More
Botrytis bunch rot. Photo by W.J. Moller
Botrytis Bunch Rot: Winemaking Implications and Considerations - Articles Articles
This article will review the implications of molds and fruit rots on wine composition and quality and discuss remedial actions in the winery. 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
Freeze damage on Concord. Photo: Michela Centinari, Penn State
Understanding and Preventing Spring Frost and Freeze Damage - Articles Articles
When early spring warming is followed by below freezing temperatures, grape growers keep their fingers crossed hoping to escape freeze injury. 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
Andrena on apple blossom. Photo: David Biddinger
Orchard Pollination: Wild Bees - Articles Articles

Orchard Pollination: Wild Bees

Dave Biddinger, Ph.D.

Managed pollinators like honey bees and mason bees are important pollinators for orchards, but research suggests that wild bees also contribute significantly to fruit tree pollination. More
Osmia cornifrons on an apple blossom. Photo: David Biddinger
Orchard Pollination: Solitary (Mason) Bees - Articles Articles
Growers of bee-pollinated crops, particularly apples, may be interested in the possible use of solitary bees as pollinators. 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
Mowing the sudex cover crop at the blueberry site at Five Elements Farm. The sudex was sown to compete against weeds, and was incorporated to add organic matter to the soil. Photo by J. Bozzelli.
Adding Small Fruits to Your Small Farm - Articles Articles

Adding Small Fruits to Your Small Farm

Marley E Skinner, Robert Pollock, Mike Basedow

Consider diversifying your farm by adding small fruit like blueberries or strawberries. More
Soil testing throughout the project helps determine if any soil amendments are needed. Photo: Kristi Kraft
Start Farming: Establishing Farmers Prepare Fields for Fruit Trees - Articles Articles
"Models for the Future" demonstration plots showcase best management practices for producers in the establishing years of developing their farm enterprises. 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
Orchard Weed Control - Part of an IPM Plan
Orchard Weed Control - Part of an IPM Plan - Articles Articles

Orchard Weed Control - Part of an IPM Plan

Robert Crassweller, Ph.D.

Applying herbicides in the fall is key to successful weed management. The application can also be part of an integrated management approach for other orchard pests like cat facing insects and rodents. More
Louis Tedders, USDA Agricultural Research Service, Bugwood.org
Tarnished Plant Bug - Articles Articles
Plant bugs are a large, diverse family of insects that feed by sucking sap from plants, especially parts with high rates of cell division like buds and flowers. More
Source: Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org
Tree Fruit Insect Pest - Lesser Peachtree Borer - Articles Articles

Tree Fruit Insect Pest - Lesser Peachtree Borer

Grzegorz (Greg) Krawczyk, Ph.D.

Lesser peachtree borer, Synanthedon pictipes, is an important pest in peach and cherry orchards throughout Pennsylvania and surrounding states. More
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