Landscape effects on spatial distribution of brown marmorated stink bug (Halymorpha halys) in peach orchards

Brown marmorated stink bug, Halymorpha halys (Stål), is an invasive pest of multiple crops in the mid-Atlantic region that has caused significant reductions in crop yield. Its ability to overwinter in forested areas and structures coupled with its wide host range have allowed it to establish populations in New Jersey farms. The spread of brown marmorated stink bug threatens the marketability and productivity of peaches in New Jersey. Knowledge of their movement into and within orchards and the landscape factors that may influence its distribution and spread will allow for localized and efficient insecticide use. The distribution and movement of brown marmorated stink bug in peach orchards was investigated. In 2012, twenty four orchards, twelve in southern New Jersey and twelve in northern New Jersey, were monitored weekly for levels of infestation by brown marmorated stink bug. These orchards were chosen based on differences in surrounding land use. GIS (Geospatial Information Systems) software was used to map hot spots of brown marmorated stink bug populations in the state and categorize land use around each orchard. Additionally, edge effects from urban structures, forests, and peaches were investigated. Three peach orchards, each bordered on at least three sides by urban structures, forests, or peaches, were monitored weekly for infestation by brown marmorated stink bug. Sampled trees were georeferenced, and maps displaying infestation patterns were developed using GIS software.