A technique to identify the host crop of Heliothis moths by analysis of elemental content has been progressively developed over several seasons (CRC Project CS13L, Fin 1986).

The cotton industry is one of the most technologically advanced agricultural industries in Australia.

The aims of the trial were: 1. To determine whether mating of H. armigera could be disrupted in cotton by mass release of pheromones; 2.

A survey form asking the cost of weed control, the major weed problems and the herbicides used was sent to fifty two cotton growers from the seven major cotton areas of New South Wales.