Abstract
Adult Rhagoletis pomonella (Walsh) were monitored daily from 13 July to 20 September 1981 in a non-orchard habitat near Durham. N.H. Red sticky spheres caught significantly more males than yellow Pherocon A.M. traps, but females were equally responsive to both types of traps. Average distance to the nearest host tree (DH) for R. pomonella caught on red spheres (3.5 m) was significantly less than DH for flies caught on Pherocon A.M. traps (6.5 m), and DH for females (5.6 m) was significantly greater than DH for males (2.9 m). Diurnal flight patterns were also monitored for 2-h periods from dawn to dusk on 8 days. Flight activity peaked at midday, with minimal activity in early morning and late afternoon. There were no significant shifts in trap preference with time of day.
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