Since 1992, CSRO Cotton Research Unit has conducted large scale insect management trials in the upper and lower Namoi Valley. The trials have utilised large field areas on privately owned farms, generally in collaboration with a commercial consultant. Over the past 4 seasons, an average of 3 trials per season have been conducted, covering both long and short season irrigation areas and dryland production. The primary aim of the trial has been to field test and validate the insect management decision support system entomoLOGIC. This included testing the functionality of the program and also establishing its value as a tool for monitoring field trials. The second aim of the work was to compare different pest management approaches, including a range of &quote;hard&quote; and &quote;soft&quote; options. The aim of the &quote;soft option&quote; was to preserve beneficial insects for as long as possible to determine whether their impact on pest numbers was sufficient to reduce the total number of sprays. In all cases, the aim was to produce the maximum possible yield and earliness, regardless of the treatments imposed. This was important considering that the trials were conducted on a commercial scale on private farms.