Pests and Diseases

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Scott Bauer, USDA Agricultural Research Service, Bugwood.org
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, Bugwood.org
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: Influentialpoints.com under creative commons license 3.0. creativecommons.org/licenses/by/3.0/legalcode
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
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
Plum Pox Virus on Nectarine
Plum Pox Virus on Nectarine - Articles Articles
PPV symptoms on nectarine. More
Plum Pox Virus on Peach Bark, Blossoms and Leaves
Plum Pox Virus on Peach Bark, Blossoms and Leaves - Articles Articles
PPV symptoms on peach bark, blossoms, and leaves. More
Plum Pox Virus on Peach Fruit
Plum Pox Virus on Peach Fruit - Articles Articles
PPV symptoms on peach fruit. More
Plum Pox Virus on Plum
Plum Pox Virus on Plum - Articles Articles
PPV symptoms on plum. More
Photo by Kathy Demchak.
Angular Leaf Spot of Strawberries - Articles Articles
Angular leaf spot, caused by the bacterium Xanthomonas fragariae, is frequently problematic in strawberry plantings. More
liz west, Flickr
Black Raspberry Streak - Articles Articles

Black Raspberry Streak

Kathy Demchak

During warm periods, inconspicuous purple streaks less than 1 inch long form on the lower part of infected canes. More
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