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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
Apple Top-Working: Managing the New Grafts
Apple Top-Working: Managing the New Grafts - Articles Articles
Top-working is the name for grafting established trees to another variety. The existing tree, the “stock”, is cut back, leaving just one or two limbs (nurse limbs) to supply the tree with energy. More
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
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
Tree Fruit Budget Tools
Tree Fruit Budget Tools - Articles Articles

Tree Fruit Budget Tools

Jayson K. Harper, Ph.D., Lynn Kime

Every two years the faculty and extension personnel update the Penn State Tree Fruit Production Guide. Within the Guide are budgets for tree fruit production. 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
John Wall, author of How to Build Orchard and Vineyard Trellises, explains the key components of a strong orchard support system. Photo: Tara Baugher, Penn State
Orchard Precision: Engineering Principles for Orchard Trellis Construction - Articles Articles
Properly gauging orchard trellis needs and designing a system that is both cost-efficient and sturdy enough to weather season after season is a challenging, but rewarding, task. More
Phytocoris conspurcatus. Photo by Tom Murray
Apple Insect Pest: New Plant Bug Type Injury to Fruit - Articles Articles

Apple Insect Pest: New Plant Bug Type Injury to Fruit

Dave Biddinger, Ph.D., Neelendra Joshi

In last the five years or so growers have noticed increases in what appears to be plum curculio damage to apple fruit. 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
Apple Crop Load Management - Alternate Bearing
Apple Crop Load Management - Alternate Bearing - Articles Articles
Alternate Bearing (AB) refers to an alternating cropping pattern that is internally regulated by the plant. 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
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
Late season fungicides needed to protect against fruit rot in storage. Photo: K. Peter, Penn State
Apple Disease, Pre- and Post-harvest - Keep Apples Free From Fruit Rot - Articles Articles
Management considerations are discussed for mitigating pome fruit rots before and after harvesting. 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
Dull, olive green areas visible on the undersides of leaves are the first evidence of apple scab.
Tree Fruit Disease - An Apple Scab Review - Articles Articles
Early season apple disease management is primarily directed at controlling scab. 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 Team Outreach
Tree Fruit Team Outreach - Articles Articles

Tree Fruit Team Outreach

Tara Baugher

Team accomplishment report for 2016. More
Gerald J. Lenhard, Louisiana State University, Bugwood.org
Tree Fruit Insect Pest - Yellownecked Caterpillar - Articles Articles
The yellownecked caterpillar is a key pest of shade trees. This insect is also destructive on the foliage of blueberry, apple, and other fruit trees. More
Whitney Cranshaw, Colorado State University, Bugwood.org
Snailcase Bagworm - Articles Articles
The snailcase bagworm is a moth (family Psychidae) that was accidentally introduced into the United States from Europe in the 1940s. More
Pest Alert - Omnivorous Leafroller
Pest Alert - Omnivorous Leafroller - Articles Articles
The omnivorous leafroller has recently been confirmed in a greenhouse in Pennsylvania. Your assistance is needed in monitoring this pest indoors and outdoors in Pennsylvania. More
Brown marmorated stink bug
Brown Marmorated Stink Bug - Articles Articles

Brown Marmorated Stink Bug

Michael J. Skvarla

The brown marmorated stink bug (BMSB) was first collected in September of 1998 in Allentown, but probably arrived several years earlier. More
Fruit Tree Propagation - Grafting and Budding
Fruit Tree Propagation - Grafting and Budding - Articles Articles
This article provides information on a few successful propagation methods that can be used on fruit trees. 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

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
Apple Cultivar Photo Gallery
Apple Cultivar Photo Gallery - Articles Articles
Photos of various apple varieties grown in Pennsylvania. More
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