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Leaf infected with Marssonina. Photo: K. Peter, Penn State
2018 Disease Update: Marssonina Blotch on Apple Trees - News News
Marssonina blotch is a foliar disease first identified in Pennsylvania in September 2017. Conditions are favorable for this disease and symptoms have been observed in several orchards. More
Photo: Tom Ford, Penn State
High Tunnel Soil Test Report: Organic Matter and Cation Exchange Capacity - News News
Cation Exchange Capacity or CEC is a measure of the ability of a soil to hold cations or elements with positive charges. More
La roña de la manzana necesita material orgánico para invernar
MIP – Exploración y Manejo de la Roña de la Manzana - Articles Articles

MIP – Exploración y Manejo de la Roña de la Manzana

Kari A. Peter, Ph.D., Montserrat Fonseca Estrada, Tianna Dupont

Asegúrese de saber dónde pasa el invierno la roña de manzana, cómo supervisarla y cuándo es más probable que aparezca. More
Bitter rot on apple and pear fruit is caused by the pathogenic fungi Colletrotrichum gloeosporioides and C. acutatum. Photo: Kari Peter, Penn State
Wanted: Bitter Rot of Apple Samples From Pennsylvania Growers - News News
The Tree Fruit Pathology Lab at the Fruit Research and Extension Center is seeking apples infected with the fungus causing bitter rot from around the state of Pennsylvania in commercial orchards. More
Un túnel alto donde el agricultor está utilizando un sistema de tierra para macetas para cultivar cultivos. Foto: Tom Ford, Extensión de Penn State
Informe de Prueba del Suelo del Túnel Alto: Niveles de Sales Solubles - News News
Continuamos nuestra serie donde hemos estado examinando informes de prueba del suelo para los túneles altos. More
Corn earworm counts are rising throughout PA.
Vegetable - Small Fruit Production Issues: August 2, 2018 - News News
July started out dry and hot but transitioned quickly, with almost no warning, to very wet and hot. More
A high tunnel where the farmer is using a soilless media system to grow crops. Photo: Tom Ford, Penn State
High Tunnel Soil Test Report: Soluble Salts Levels - News News
Soluble salts commonly found in soils are calcium, magnesium, sodium, chloride, sulfate, and bicarbonate. Potassium, ammonium, nitrate, and carbonate are also found, but in smaller quantities. More
Hail damaged fruit need protection from fruit rots. Photo: T. Ford, Penn State
Managing Fruit Rots This Season - News News

Managing Fruit Rots This Season

07/26/2018

Fungicide re-applications are necessary since several inches of rain have fallen the last few days. Management considerations are discussed for mitigating pome and stone fruit rots. More
Japanese beetle on raspberries. Photo: Kathy Demchak, Penn State
Vegetable - Small Fruit Production Issues: July 12, 2018 - News News
Downy mildew was confirmed on cucumber in Mifflin County on July 11. Warmer weather throughout the state is helping crops along, but has also been good for insect pests. More
The potato leafhopper, Empoasca fabae, is a pest that is easy to overlook until the damage - called "hopperburn" - "burns" you. Photo: Penn State College of Agriculture
Vegetable - Small Fruit Current Issues: June 28 2018 - News News
Wet weather and variable temperatures across the state continue to be challenging for vegetable and berry production. More
Photo: Tom Ford, Extensión de Penn State
Informe de Prueba del Suelo del Túnel Alto: pH del Suelo - News News
pH del suelo en una encuesta de 27 túneles altos en Pennsylvania More
Photo: Tom Ford, Extensión de Penn State
Informe de prueba del suelo del túnel alto: Niveles de nutrientes del suelo - News News
Niveles de fósforo, potasio, magnesio y calcio en una encuesta de 27 túneles altos en Pennsylvania. More
Keep leaves on the tart cherry trees: Postharvest fungicide applications are necessary to limit cherry leaf spot infections. Photo: K. Peter, Penn State
Mid-Season Tree Fruit Disease Update - News News
The latest 2018 disease updates growers need to know for apple scab, fire blight, sooty blotch and flyspeck, bacterial spot, and cherry leaf spot. More
High tunnel tomatoes. Photo: Tom Ford, Penn State
High Tunnel Soil Test Report: Soil Nutrient Levels - News News
Phosphorus (P), potassium (K), magnesium (Mg), and calcium (Ca) levels in a survey of 27 high tunnels across Pennsylvania. 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
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
Source: Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org
Apple Disease - Blossom End Rot - Articles Articles

Apple Disease - Blossom End Rot

Kari A. Peter, Ph.D.

Blossom end rot of apple, is caused by various fungi (Sclerotinia sclerotiorum, Botrytis cinerea, Botrysphaeria obtusa) just before or during petal fall. More
Black rot on cabbage, caused by the bacterium Xanthomonas campestris pv. campestris. Note characteristic “V” shaped lesions starting at leaf margin. Photo: Lee Stivers, Penn State
Vegetable - Small Fruit Current Issues: Mid-June 2018 - News News
Cloudy weather, rainstorms, and variable temperatures across the state have slowed some crops and created very favorable conditions for disease development. More
It is important to monitor your orchard site for conditions. Photo: Kari Peter, Penn State
Disease Update: More Advice for Limiting Fire Blight Spread - News News
Fire blight symptoms are widespread throughout Pennsylvania and Maryland. Growers are encouraged to use Apogee or Kudos to shut down tree growth to limit the spread of the disease in orchards. More
Be on alert for apple scab disease conditions until mid-June. Photo: Kari Peter, Penn State
Tree Fruit Disease Conditions Were on Steroids in May - News News
Conditions were incredibly optimal for many tree fruit diseases during the month of May. Management strategies for pome and stone fruit diseases are discussed. More
Scout for fire blight in your orchard. Photo: Kari Peter, Penn State
Disease Update: Dealing with Fire Blight Infections - News News
Reports of fire blight infections have started to occur. The dos and don’ts of managing fire blight infections are discussed. More
Photo: Tom Ford, Penn State
High Tunnel Soil Test Report: Soil pH - News News
Soil pH in a Survey of 27 High Tunnels in Pennsylvania More
Fruitlets. Photo: Kari Peter, Penn State
Disease Update: Managing Diseases During Wet Weather - News News
Trees need to be protected during wet conditions. The following are strategies for keeping diseases in check on apple and stone fruit during persistent rainy weather. More
Pepper transplants. Photo: Tom Ford, Penn State
Vegetable - Small Fruit Current Issues: May 18, 2018 - News News
It’s no secret that this spring has been cold and wet across Pennsylvania. On many farms, planting has been delayed as much as three weeks, and many crops already in the ground are developing more slowly than usual. More
Early symptoms of blossom blight. Photo: K. Peter, Penn State
Disease Update: Fire Blight, Scab, Bacterial Spot Conditions Alert - News News
The forecast for May 15–18 indicates conditions will be favorable for apple scab and bacterial spot on peach infections. If infections occurred during bloom, fire blight symptoms could begin to appear this week. More
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