Common Problems

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Apple and Pear Disease - Fire Blight, Dormant Removal of Cankers
Apple and Pear Disease - Fire Blight, Dormant Removal of Cankers - Articles Articles
When it comes to managing fire blight, the first line of defense is good sanitation, which is removing the overwintering source for the bacteria: cankers. More
Mites feeding on leaves cause injury to the tree by removing leaf tissue. The most serious injury occurs in early summer when trees are producing fruit buds for the following season. Photo by G. Krawczyk.
Tree Fruit Mite Pest - European Red Mite - Articles Articles

Tree Fruit Mite Pest - European Red Mite

Grzegorz (Greg) Krawczyk, Ph.D.

European red mite, Panonychus ulmi, is considered by many growers throughout Pennsylvania to be one of the most important apple pests. More
Examples of stages of fruit bud development: top left - apple tight cluster; top right - apple first bloom; lower left - sweet cherry first white; lower right - peach pink.
Orchard Frost - Critical Temperatures for Various Fruits - Articles Articles
The temperature at which fruit buds are injured depends primarily on their stage of development. More