Pitfall traps captured 8–10 black vine weevils, Otiorhynchus sulcatus (F.), per trap, while trap-boards and cardboard wafers averaged less than 2 adults per trap. In addition, the trapboards and cardboard wafers were not effective for determining the onset of adult emergence. In 1988, pitfall traps captured 16.6 adults per trap while deep-pan traps captured 5.7 adults per trap. However, deep-pan traps, constructed from dog food dishes, were as effective as pitfall traps in capturing the first adults to emerge, and they captured adults throughout the summer. Their simple design and easy installation may make them more useful for detecting infestations. Emergence traps, consisting of pitfall traps surrounded by a circular barrier, did not result in accurate estimates of density. The number of females with mature ovaries peaked in late July and early August, 1988, about 30 days after the peak in trap captures. Removal of overwintered females and those that emerged early, by applying a short residual insecticide (acephate), had no impact on subsequent larval infestation. However, single applications of Evercide Concentrate 2357 (fenvalerate plus d-cis, trans allethrin and N-octyl bicycloheptene dicarboximide), Asana (esfenvalerate) and Mavrik (fluvalinate), to control adults, significantly reduced the infestation.