Trees should be dispersed sufficiently to achieve representative sampling of the entire orchard. This can be accomplished in most rectangular orchards by sampling in a diagonal direction. For square orchards, a Z-shaped pattern is appropriate. The station tree concept involves selection of representative trees at the time of orchard establishment or at the beginning of each season. Selected trees are flagged, numbered and revisited each monitoring period throughout the season.
Random samples provide information on a larger proportion of trees within an orchard over time.
Station trees more closely follow pest or disease dynamics on a few individual trees. Both systems have merit and, depending on the desired result and amount of time to be invested, a combination of both methods may prove most useful. Field Records Systematic recording of data in the field is time consuming but necessary for clarity in review and interpretation of results. Organization of the data in summary form following field sampling allows for rapid review and assessment of individual orchard situations. Information gathered during the monitoring process aids in planning future pest management strategies.