In surface irrigation systems we use beds rather than growing thee crop on the flat for several reasons.

This paper provides an overview of the Cotton Research and Development Corporation project DDI lL, which is in its final year at the University of Southern Queensland.

There are, few parasitoids which specifically attack the pupal stage. This is perhaps understandable since pupae are not readily accessible, being in the soil.

Retained hills are now a well-established management strategy in the Australian Cotton Industry.

Obviously, avoiding trafficking wet soil is one means of avoiding soil structural damage. Another is to use a vehicle with lower ground pressure, by using dual tyres, wide tracks, etc.

The importance of Heliothis has grown with the advent of resistance in H.armigera to various pesticides.

We have conducted a series of experiments at Trangie, Warren, Narrabri and Moree to examine the use of shallow leading tines in conjunction with rippers. Ripper depths of 300, 450 and 600 mm have been investigated.

In the 1991/92 season we started observations in both sprayed and unsprayed plots of different cotton varieties to record the numbers of fruit lost during the season and to identify the causes of shedding.

The companion project to SOILpak, "Soil management training for advisers to cotton growers" has made a good start in familiarising consultants and agronomists with structural recognition.

HOTEL CONRAD AND JUPITERS CASINO, BROADBEACH, GOLD COAST, QUEENSLAND ORGANISED BY THE AUSTRALIAN COTTON GROWERS RESEARCH ASSOCIATION INC. (ACGRA

This paper discusses recent progress with the refinement of promising methods, both direct and indirect, for measuring the severity of compaction in cracking clays used for irrigated cotton.

The reliance of the Australian cotton industry on insecticides for the control of insect pests represents a major economic and environmental concern. In the face of pesticide resistance in H.

Cotton growers began to realise in the late 1970's that compaction of clay soils may have been a cause of declining yields. Research over the last 10 years has confirmed those suspicions.

This paper outlines the requirements to effectively operate a Controlled Traffic farming system, with emphasis on the need for some form of automatic steering assistance for farm machinery.

A change of direction for entomoLOGIC and some improvements to hydroLOGIC will provide growers and consultants in the 1992/93 season with effective, low cost decision support systems for irrigation and pest management

This project was established to find a simple, repeatable and reliable technique or series of techniques for consultants, extension personnel and managers to use to assess soil structural conditions in the field.

It has been 9 years now since the introduction of the Summer Crop Resistance Management Strategy in 1983/84 season.

Nitrogen management plays a key role in cotton production. It is the nutrient required in greatest quantity by the crop and it is the nutrient most often deficient.

The suspected importance of pyrethroid metabolism in resistant H.armigera. made the investigation the biochemical basis of pyrethroid resistance in H. armigera imperative.