The tephritid fruit flies that feed on cultivated cherries in New York and surrounding areas include two native species, the cherry fruit fly, Rhagoletis cingulata, and the black cherry fruit fly, R. fausta, as well as the ...

Powdery mildew occurs in all apple-producing regions worldwide, especially where warm, humid climate conditions prevail. Young expanding plant tissues are particularly susceptible to the disease. Therefore, powdery mildew ...

The gray garden slug was introduced from Europe during the 1800s. It has become a common pest of vegetables, field crops, and ornamentals throughout the United States and Canada. It is a close relative of the marsh slug, ...

The marsh slug is native to North America, and is also found in South America, Europe, and Asia. It is a relative of the gray garden slug, Deroceras reticulatum (Muller), and shares manyaspects of its biology. Both are ...

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 ...