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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
Home Fruit Gardens: Table 1.2. Monthly Maintenance
Home Fruit Gardens: Table 1.2. Monthly Maintenance - Articles Articles
Your schedule may vary from the one below by as much as 2 weeks (earlier or later) depending on the region of Pennsylvania in which you are located. 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: A Jones.
Pear Disease - Pear Leaf Spot Fungus - Articles Articles
The pear leaf spot fungus, Mycosphaerella pyri, infects the leaves of pear, quince, and occasionally apple trees. Numerous leaf spots can produce defoliation. More
Lesley Ingram, Bugwood.org
Oriental Fruit Moth of Stone Fruit in Home Fruit Plantings - Articles Articles
The oriental fruit moth (OFM), Grapholita molesta, is a pest of most stone and pome fruits. 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
Penn State Department of Plant Pathology & Environmental Microbiology Archives, Penn State, Bugwood.org
Fire Blight in Home Orchards - Articles Articles
Fire blight overwinters in cankers on branches and trunks. When the temperature reaches about 65°F, bacteria begin to multiply and appear on the outsides of the cankers as clear amber ooze. More
Leaf and Fruit Spot of Pear in Home Gardens
Leaf and Fruit Spot of Pear in Home Gardens - Articles Articles
Leaf blight and fruit spot are caused by the fungus Fabraea maculata, which infects the leaves, fruit, and shoots of pear and quince and the leaves of apple trees. More
Source: Howard F. Schwartz, Colorado State University, Bugwood.org
Pear Disease - Pear Scab - Articles Articles
Pear scab resembles apple scab in nearly all respects and is caused by the closely related fungus Venturia pirina. More
John Hartman, University of Kentucky, Bugwood.org
Home Orchards: Fire Blight Management in Apples and Pears - Articles Articles
Temperatures just before and during bloom will determine if fire blight becomes serious in early spring. More
Penn State Department of Plant Pathology & Environmental Microbiology Archives, Penn State, Bugwood.org
Fire Blight in Home Apple and Pear Orchards - Articles Articles
Fire blight is destructive to apple and quince trees and is the most serious pear disease in the eastern United States. More
Jim Baker, North Carolina State University, Bugwood.org
Green Aphids in the Home Fruit Garden - Articles Articles
Green aphids include two species that are very difficult to distinguish, the apple aphid, Aphis pomi, and the spirea aphid, A. spiraecola. More
Gypsy Moth in the Home Fruit Planting
Gypsy Moth in the Home Fruit Planting - Articles Articles
The gypsy moth, Lymantria dispar, might attack fruit trees, especially apple trees, causing leaf damage. Damage can be severe on young trees, where defoliation can stunt or kill the plant. More
European Red Mite in the Home Fruit Planting
European Red Mite in the Home Fruit Planting - Articles Articles
The European red mite, Panonychus ulmi, a major tree fruit pest that attacks apples, stone fruits, and pears, is considered one of the most important indirect apple pests in Pennsylvania. More
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