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Spongy moth, Lymantria dispar, may attack fruit trees, especially apple, causing defoliation that can stunt or kill young trees.

The green peach aphid, Myzus persicae, is a common pest of peach and nectarine in Pennsylvania.

Spirea aphid, Aphis spiraecola, has largely displaced the apple aphid, A. pomi, in apple since the mid-1980s.

Since 1985, European apple sawfly (Hoplocampa testudinea) has extended its range from the northeastern portion of Pennsylvania to the Maryland border. Now this pest is common throughout Pennsylvania.

The speckled green fruitworm, Orthosia hibisci, is the most common of several green fruitworm pests occurring in commercial orchards.

Dogwood borer, Synanthedon scitula, was found for the first time in the 1980s as a common pest in the burr knots of apple trees.

Codling moth, Cydia pomonella, was introduced from Europe in colonial times and now occurs throughout North America as well as most of the world, wherever apples are grown.

Buffalo treehopper, Stictocephala bisonia, is an occasional pest of fruit trees in Pennsylvania. It gets its name from its humpbacked resemblance to the shape of a buffalo.

The brown marmorated stink bug (BMSB), Halyomorpha halys, is an exotic insect species naturally occurring in Japan, southern China, and Korea.

The black cherry aphid, Myzus cerasi, is the most common aphid attacking cherries, primarily sweet cherries, in most parts of North America.

Apple maggot, Rhagoletis pomonella, also known as the "railroad worm," is abundant in untreated orchards and backyard trees.

Apple grain aphid, Rhopalosiphum fitchii, rarely causes damage to apples, but it is the first aphid to appear on apples in spring and may appear in large, but innocuous, numbers.

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.

Apple leafminer, Lyonetia prunifoliella, has become fairly common in young, nonbearing trees since the 1980s, but has not resulted in economic injury.

Insecticides and miticides should be selected based on the pests to be controlled and product efficacy. Prevent resistance to pest control chemicals by alternating chemicals by IRAC code group.

Applicators who apply restricted-use pesticides must be certified as a private applicator or must work under the direct supervision of a certified applicator.

La mayoría de las muertes que ocurren en el campo se deben a accidentes de transporte. Éstos incluyen los vuelcos, los atropellamientos, los sistemas de toma de fuerza (PTO) y el contacto involuntario con implemento/s de tractores.

When early spring warming is followed by below freezing temperatures, grape growers keep their fingers crossed, hoping to escape freeze injury.

Potassium (K) plays a critical role in many plant physiology and biochemistry processes such as photosynthesis, osmoregulation, and enzyme activation.

En Estados Unidos, el estado de Pensilvania es el cuarto mayor productor de manzanas y el tercero en la producción de duraznos. Cada año, los productores de frutas se enfrentan a infinidad de retos productivos.

Este video muestra los sistemas de muralla frutal Quad V y Hex V en duraznos.

Compares costs and returns for medium vs high tree density orchard systems.

Compares costs of production for multiple blocks and fruit types on a farm.

Planning and preparing a site for a new orchard begins two to three years ahead of planting. Mistakes made in planning and planting an orchard cannot easily be reversed.

During the 2018 Mid-Atlantic Fruit and Vegetable Conference, Dr. Rob Crassweller organized an apple variety showcase.