Mummyberry is perhaps the most common disease of blueberries in North America. Its severity varies greatly from year to year depending on weather conditions. Crop losses can be significant in years with rainy springs. ...

Red stele is a destructive disease in most strawberry-producing regions of the world in which soils tend to be cool and wet. Although red stele does not occur on all farms in New York, it is common on poorly drained soils. ...

Leaf spot is a common and sometimes serious disease of sour cherries in the Northeast. In wet years, high levels of infection can cause trees to defoliate by mid-summer, leading to inferior crop quality, significantly ...

Black knot is a common and often serious disease of plum and prune trees in New York. Once established, the disease becomes progressively more severe each year unless control measures are taken. Infected limbs and twigs ...

The banded grape bug is a sporadic, early-season pest of grapes that feeds on clusters between bud break and bloom. It damages grapes during the period of rapid shoot expansion and flower cluster development. Injury by the ...

Angular leaf scorch was first described in 1985. Its symptoms are similar to those of rotbrenner, a disease of grapevines found in the cool grape-growing regions of Europe such as Austria, Germany, the Alsace and Champagne ...

Phomopsis cane and leaf spot, once known as “dead arm,” is a common disease in most regions of the world where viticulture is practiced. Severely infected leaves are misshapen, yellow, and fall from the vine prematurely. ...

Crown gall of grape is an important disease in all areas where grapes are grown worldwide, but is particularly severe in regions with cold climates. Formerly designated as Agrobacterium tumefaciens biovar 3, A. vitis, the ...

Leather rot is a disease of strawberries that occurs sporadically throughout New York State. Although it is a less common cause of fruit decay than gray mold (Botrytis fruit rot), leather rot can cause significant damage ...

The apple maggot (AM), a native of eastern North America, originally bred in large fruited hawthorns (Crataegus sp.). Later, it adopted apple as another host, and it has become a major fruit pest in the northeastern United ...