Includes alternaria leaf blotch, apple crown rot, apple scab, bitter rot, black rot, blister spot, blossom end rot, blue mold, brooks fruit spot, crown gall, fire blight, gray mold, moldy core, mucor rot, necrotic leaf blotch, nectria twig blight, powdery mildew, rust diseases, union necrosis and decline, sooty blotch and flyspeck, and white rot.
Includes fireblight of pear, Fabraea leaf and fruit spot, pear leaf spot, pear scab, sooty mold, and stony pit.
Includes anthracnose, bacterial canker, bacterial spot, black knot, brown rot, cherry leaf spot, crown gall, cystospora canker, peach leaf curl, plum leaf spot, plum pox, plum pockets, powdery mildew, rhizopus rot, peach scab, prunus stem pitting, and rusty spot.
Regular weather monitoring and field scouting are important components of integrated management of orchard diseases.
Information to assist growers in selecting chemical controls and timings for tree fruit diseases.
Plum pox virus (PPV) was discovered for the first time in North America in 1999 in a peach orchard in Adams County, Pennsylvania. In Pennsylvania, peach, plum, nectarine, and apricot stone fruit and native and ornamental Prunus are susceptible to PPV, Strain D. Pennsylvania was declared free of the virus in October 2009 after three years of negative testing. Formal orchard surveys for the virus are no longer occurring, though standard testing of nursery material continues. Additional orchard monitoring may be proposed in future years, as part of ongoing early detection strategies for pests of concern. Lifting of the quarantine in Pennsylvania opened many acres for replanting Prunus. However, growers need to remain vigilant for any early indications the virus has returned. New plantings offer the opportunity for a “fresh start” and growers must plan carefully to get the most from their investment.