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. ...

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 ...

The tarnished plant bug is found throughout North America, but it is primarily a pest in temperate nondesert areas. It feeds on more than fifty economically important plants , including alfalfa , cotton, strawberries, ...

The European apple sawfly is an introduced pest that was first noted in North America infesting crabapples on Long Island (Farmingdale, N.Y.) and Vancouver Island (Victoria, B.C.) during 1939 and 1940, respectively. Since ...

The Comstock mealybug (CMB) was first reported in the United States in 1918 concurrently in New York and California, and has since spread to all coastal states and the Ohio and Mississippi River valleys. Its fruit hosts ...