A knowledge of dispersal is essential to an understanding of population control and to the management of insecticide resistance.

At Narrabri we are continuing our breeding program to develop locally adapted early maturing varieties.

Numerous studies on the effect of the nectariless gene on insect pests of cotton have been carried out both overseas and in Australia.

In 1981 we released SICOT 3 to the industry.

Intense selection pressure has led to the development of insecticide resistance

With increasing problems of resistance to chemical pesticides amongst cotton pests, especially Heliothis, more attention is being given to biological control agents, including pathogens.

With the appearance of pvrethroid resistance in Heliothis armigera during the 1992/3 cropping season a strategy aimed at limiting the development of widespread resistance was rapidly implemented .H.

In recent years sap-sucking bugs have been associated with early season damage.to cotton crops in most of the production centres in New South Wales and Queensland.

The pink spotted bollworm (Pectinophora scutigera) has been an important.pest of cotton since 1924 in coastal, and sub-coastal Dawson-Callide regions of central Queensland.

Different cultivars are now becoming commercially available including Australian bred cultivars, and cotton growers now have a choice of which cultivar to plant.

At the 1982 Australian Cotton Growers' Research Conference the effects of land preparation at different soi1 water contents on soil structure and cotton growth was reported.

Land, Water & Wool is the wool industry's largest-ever collaborative research investment in sustaining the natural resource base and aims to overcome the major challenges of access to information about sustai