Since the first reported control failures at Emerald during the 1998-99 cotton season, insecticide resistance in cotton aphid, has emerged as a significant threat to the Australian cotton industry.

The research project described in this report is concerned with the isolation and, characterization of a gene/enzyme system for the bioremediation of endosulfan sulfate, (endosulfate), the toxic metabolite of endosulf

Profenofos resistance is due to esterase mediated metabolism. Preliminary research suggests that an insensitive acetylcholinesterase is also involved.

In a two season study, results from large scale field trials, supported by laboratory bioefficacy experiments showed that the adoption of Large Droplet Placement (LDP) techniques for the aerial application of insectic

More than 2000 cotton industry personnel (including growers, spray operators, consultants

and spray contractors) participated in spray application workshops conducted throughout all