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Andrena on apple blossom. Photo: David Biddinger
Wild Bees in Orchards - Articles Articles

Wild Bees in Orchards

Dave Biddinger, Ph.D.

Managed pollinators like honey bees and mason bees are important pollinators for orchards, but research suggests that wild bees also contribute significantly to fruit tree pollination. More
Scott Bauer, USDA Agricultural Research Service,
Gray Mold on Strawberries - Articles Articles
Gray mold, or botrytis blight, is a common disease of a number of nonwoody plants worldwide and causes a greater loss of strawberry flowers and fruit than any other disease. More
Todd M. Gilligan and Marc E. Epstein, TortAI: Tortricids of Agricultural Importance, USDA APHIS ITP,
Cherry Fruitworm on Blueberries - Articles Articles
The cherry fruitworm, Grapholita packardi (Zeller), overwinters as large larvae in cavities usually made in the dead wood on the bush. More
Leafhopper nymphs are whitish green, smaller, and wingless, and are usually found on the undersides of older leaves. Photo by G. Krawczyk.
White Apple Leafhopper - Articles Articles

White Apple Leafhopper

Grzegorz (Greg) Krawczyk, Ph.D.

White apple leafhopper, Typhlocyba pomaria, was abundant in many apple orchards throughout the state until the introduction of the neonicotinoids about 10 years ago. More
Broad Mites on Blackberries
Broad Mites on Blackberries - Articles Articles
Broad mite (Polyphagotarsonemus latus) has been problematic for pepper growers in PA for the last couple of years. Now we can add blackberries to the list of crops that they frequent. More
Source: under creative commons license 3.0.
Apple Grain Aphid - Articles Articles

Apple Grain Aphid

Grzegorz (Greg) Krawczyk, Ph.D.

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. More
H.J. Larsen,
Apple Crown and Collar Rot - Articles Articles
Crown rot continues to be a major cause of tree death in Pennsylvania orchards. Certain rootstocks are more susceptible than others, and the disease often occurs on heavy, poorly drained soils. More
Golden Delicious Apples
Apple Production - Articles Articles

Apple Production

Jayson K. Harper, Ph.D., Lynn Kime, Robert Crassweller, Ph.D.

Apples may be grown in many parts of the country and lend themselves well to part-time farming operations. More
Harvest Calendar
Harvest Calendar - Articles Articles

Harvest Calendar

John Berry

This calendar will assist with matching your production with your marketing. More
Photo credit: Steve Culman
Soil Quality Information - Articles Articles
Healthy soils yield healthy crops, But what is healthy soil and how do we achieve it? More
Strawberries on Matted Row
Strawberry Production - Articles Articles

Strawberry Production

Kathy Demchak, Jayson K. Harper, Ph.D.

The high value of strawberries creates potential for sizable profit from a small planting; however, the potential for serious problems also exists. 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.
Crown Gall - Articles Articles

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
Plum Pox Virus on Almond
Plum Pox Virus on Almond - Articles Articles
PPV symptoms on almond leaves. More
Plum Pox Virus on Apricot
Plum Pox Virus on Apricot - Articles Articles
PPV symptoms on apricot. More
Plum Pox Virus on Cherry
Plum Pox Virus on Cherry - Articles Articles
PPV symptoms on cherry. More
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