At the 1992 Australian Cotton Research Conference, we reported on field trials of a prototype Heliothis ID kit that were held during the 1991-92 growing season (Trowell et al., 1992). We described a number of problems revealed by the field trials and outlined the research and development plan we had put in place to overcome them. All those problems were overcome by October 1992 and our second prototype performed very well in trials held during the 1992/93 growing season. Subsequently, the kit was licensed to Abbott Australasia Pty. Ltd. Who christened it the LepTon Test Kit. As is probably well known throughout the cotton growing community, the LepTon Test Kit was launched by Abbott Australasia in October 1993 and has now been commercially available for one full cotton growing season. It plays an important role in the Australian cotton industry's resistance management strategy.