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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., Tara Baugher, Tianna Dupont

Asegúrese de saber dónde pasa el invierno la roña de manzana, cómo supervisarla y cuándo es más probable que aparezca. More
Handwashing Poster
Handwashing Poster - Articles Articles

Handwashing Poster

Martin Bucknavage

Poster provides instructions on the proper handwashing techniques. In spanish and english. More
Developing a Food Defense Plan
Developing a Food Defense Plan - Articles Articles

Developing a Food Defense Plan

Martin Bucknavage

Learn how to meet compliance requirements in the Food Safety Modernization Act (FSMA) rule on preventing intentional contamination. More
Food Safety Modernization Act - Foreign Supplier Verification Program (FSVP) Rule
Food Safety Modernization Act - Foreign Supplier Verification Program (FSVP) Rule - Articles Articles
Learn more about imported foods and the FSMA Foreign Supplier Verification Program rule, plus find educational opportunities from Penn State Extension. More
Food Safety Poster: Control Food Temperatures
Food Safety Poster: Control Food Temperatures - Articles Articles
Poster providing proper food temperatures. More
Food Safety Poster: Wash Hands
Food Safety Poster: Wash Hands - Articles Articles

Food Safety Poster: Wash Hands

Martin Bucknavage

Poster detailing when to wash your hands. More
Food Safety Poster: Cool Foods Quickly
Food Safety Poster: Cool Foods Quickly - Articles Articles
Poster explaining how to properly cool foods quickly. More
Food Safety Poster: Prevent Cross-Contamination
Food Safety Poster: Prevent Cross-Contamination - Articles Articles
Poster explaining how to prevent cross contamination 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
Food Safety Modernization Act - Preventive Controls for Human Food Rule
Food Safety Modernization Act - Preventive Controls for Human Food Rule - Articles Articles
Learn the details and find educational resources on the FSMA Human Food Rule, including videos and training opportunities that address requirements, exemptions, and deadlines of the rule. More
FDA Food Code FDA Food Code - Articles

FDA Food Code

Martin Bucknavage

The Food Code is a model for safeguarding public health and ensuring food is unadulterated and honestly presented when offered to the consumer. More
A declining tree with bark removed from graft union to show necrosis. Note numerous rootstock suckers. (Photo: K. Peter)
Apple Disease - Rapid Apple Decline (RAD) or Sudden Apple Decline (SAD)? - Articles Articles
There is a mystery surrounding rapid apple decline/sudden apple decline of young, dwarf apple trees. More
Plum Pox Virus
Plum Pox Virus - Articles Articles

Plum Pox Virus

Kari A. Peter, Ph.D.

Plum pox virus (PPV), or Sharka, is a viral disease that infects not only plum but other economically important Prunus species. More
Young galls are light in color and with age become dark and hard, ½ inch to 3 or 4 inches in diameter. Photo by B. Butler.
Tree Fruit Disease - Crown Gall - Articles Articles

Tree Fruit Disease - Crown Gall

Kari A. Peter, Ph.D.

Crown gall is caused by a bacterium, Agrobacterium tumefaciens, and affects apples, pears, quince, peaches, nectarines, apricots, plums, and cherries. More
Source: K. Yoder.
Apple Disease - Brooks Fruit Spot - Articles Articles

Apple Disease - Brooks Fruit Spot

Kari A. Peter, Ph.D.

Caused by the fungus Mycosphaerella pomi, Brooks fruit spot is also known as Phoma fruit spot. The disease attacks apple and crabapple trees and is rarely found in well-sprayed orchards. More
Pear Disease - Stony Pit
Pear Disease - Stony Pit - Articles Articles

Pear Disease - Stony Pit

Kari A. Peter, Ph.D.

Stony pit of pear is presumed to be caused by a destructive virus, but the virus has not been isolated. Affected fruit are unsightly and unmarketable. More
Photo by K. Peter.
Pear Disease - Sooty Mold - Articles Articles

Pear Disease - Sooty Mold

Kari A. Peter, Ph.D.

Sooty mold fungi of the genus Capnodium cause an unsightly blackening over the surface of fruit and leaves. More
A characteristic symptom of shoot blight is the bending of terminal growth into the shape of a shepherd’s crook. Photo by K. Peter.
Apple Disease - Fire Blight - Articles Articles

Apple Disease - Fire Blight

Kari A. Peter, Ph.D.

Fire blight, Erwinia amylovora, is a destructive disease that can attack some 75 species of plants of the rose family. More
Source: Joseph OBrien, USDA Forest Service, Bugwood.org
Plum Disease - Plum Leaf Spot - Articles Articles

Plum Disease - Plum Leaf Spot

Kari A. Peter, Ph.D.

Leaf spot of plums and prune-type plums is caused by the fungus Coccomyces prunophorae. More
Source: William M. Brown Jr., Bugwood.org
Peach Disease - Powdery Mildew of Peach, Nectarine, and Apricot - Articles Articles
Powdery mildew, Sphaerotheca pannosa, sometimes called rose mildew (it affects some woody ornamentals), is not often serious. More
Source: Bruce Watt, University of Maine, Bugwood.org
Stone Fruit Disease - Powdery Mildew of Cherry and Plum - Articles Articles
The disease is caused by Podosphaeria oxyacanthae, one of the common species of the powdery mildew group of fungi. More
Source: Mike Schomaker, Colorado State Forest Service, Bugwood.org
Stone Fruit Disease - Plum Pockets - Articles Articles

Stone Fruit Disease - Plum Pockets

Kari A. Peter, Ph.D.

In the northeastern United States, the most important disease affecting American-type plums is known as plum pockets, or bladder plum. It is caused by Taphrina communis. 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
Source: John Hartman, University of Kentucky, Bugwood.org
Apple Disease - Blister Spot on Crispin (Mutsu) - Articles Articles
Crispin apples are highly susceptible to blister spot bacterial infection, Pseudomonas syringae, about 2 weeks after petal fall for a period of 2 to 4 weeks. More
Photo by G. Moorman
Plum Disease - Black Knot - Articles Articles

Plum Disease - Black Knot

Kari A. Peter, Ph.D.

Black knot of plum, caused by the fungus Dibotryon morbosum, is well-named because of the characteristic black, warty knots it forms on branches of infected trees. More
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