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, ...

Sooty blotch and fly speck are the two most common “summer diseases” of apples in the Northeast; they are also problems on pears. Although caused by two different organisms, the diseases often occur together since both are ...

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 codling moth (CM) is a pest introduced from Eurasia. The larvae feed on the fruit of a wide range of host plants including apple, pear, quince, hawthorne, crabapple, and walnut. CM completes 1.5-3.5 generations annually, ...

Mullein plant bug (MPB) and apple brown bug (ABB) are occasional pests of apple and pear in New York. Because they occur in the same place at the same time and cause the same kind of damage, they are collectively referred ...

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 ...

European red mites (ERM), Panonychus ulmi, feed on leaves of apple trees and thereby interfere with photosynthesis and production of carbohydrates. At high levels, ERM damage to apple leaves reduces fruit yield and quality. ...

Although the number of wood-boring beetles attacking fruit trees is relatively small and their infestations are sporadic, four species found in New York are capable of seriously damaging or killing trees. They differ some ...