The past season has been 11 abnormal 11 - how do we define a 11 normal" one? - but abnormal in the sense that significant shifts in trading patterns have occurred.

Regulations over the use of pesticides in cotton production have been in existence ever since that industry emerged in Australia.

An important question is the area of origin of these spring immigrants. Over the last 3 years, we have been investigating the ecology of Heliothis spp. in inland Australia (Gregg et al. 1987, 1989).

Numerous alternative control techniques have been available In various forms for many years. Unfortunately none of these alternatives have been regarded as practically or economically viable.