The obliquebanded leafroller, Choristoneura rosaceana, has become a key pest in New York apples since the mid-1970’s. Anecdotal references have been made indicating that the growers closest to Lake Ontario have higher populations of leafrollers and the fruit has higher damage levels than the more inland orchards. It is also believed that certain locations have consistently high leafroller populations relative to other locations. Five years of data were supplied by an upstate New York fruit packing company showing percent damage to fresh market apples due to obliquebanded leafroller feeding. Grower blocks associated with the damage data were digitized to create a map of the region using ArcView, and the data were visualized on the map to identify areas of high damage. The goals of the analysis were to determine whether there was a relationship between damage levels and proximity to Lake Ontario, and whether high damage levels in one block one year correlated with high damage levels in the same block the following year.
Species 1: Lepidoptera Tortricidae Choristoneura rosaceana (obliquebanded leafroller)
Keywords: spatial analysis, apple
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