Abstract
Potato tuberworm moth population was monitored using water pan traps with rubber septa, impregnated with trans-4, cis-7-tridecadienyl acetate, in a 12-ha field in which 4 successive potato plantings were made over a 2 yr period. Tuberworm moth populations were directly related to the presence of potato foliage in successive crops and were annually highest in the spring plantings. Spring populations increased as the crop matured and decreased when vines were killed and potatoes were harvested. Following harvest, moth activity remained low until the late-summer planting emerged and, even with available host material, the late-summer planting did not support a high tuberworm population. After harvest of the late summer crop, the tuberworm population remained low until the next spring crop emerged.
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