Brassicaceae growers are highly dependent on chlorpyrifos (an organophosphate) for control of the cabbage maggot (CM: cabbage root fly; Delia radicum (L.); Anthomyiidae). The threat of its loss, chemical resistance, and environmental scrutiny has increased grower willingness to test new management strategies. As a result of evaluating the cabbage maggot pest situation in Oregon root crops, a program -- "MagNet": a NETwork of people working together to develop a best management strategy targeting cabbage MAGgot management -- was developed. A strategic ‘toolbox’ is being developed to reduce overall chlorpyrifos use, including: monitoring (eggs, seasonal flight and damage); degree-day modeling; spatial management, cultivation methods; physical barrier methods (row covers) and testing alternative chemistries and applications. The 2001-2004 data indicates that there are three concerted egg-laying periods verified by adult catches in yellow water traps and placement of spring emergent traps over over-wintering pupae. Degree-day modeling and scouting for eggs is proving to better time treatments to high risk CM-periods. Higher damage levels were seen in fields planted near close-by CM-sources. Chlorpyrifos, fipronil, and spinosad applied in-furrow or as film-treated seeds are showing promising results. Pyrethrins, thiomethoxam, chlothianidin, and imidacloprid are being explored as foliar applications. Adult emergence can be reduced after fall and spring disking of pupae-infested fields. An Excel-based geographic information system (GIS) is being developed to conduct routine analytical procedures for the growers’ management purposes. An IPM continuum rating document, “the PEST Plan,” and field risk assessment are being designed to inspire grower interest and adoption of IPM practices.