Insecticides can poison insects in many ways. Insecticides r...:an interfere with metabolic processes , of energy production, cuticular growth and hormone production.

Irrigation trials have been conducted at Byee over the last two seasons as part of a Statewide project funded by the Cotton Research Council.

There are increasing areas of cotton grown in regions which are prone to cool seasons, eg. the Darling Downs, the upper Namoi and upper Macquarie valleys.

At the time of the initiation of the H.armigera resistance management strategy, there was a need to demonstrate that any increase in resistance was limited to crops sprayed with pyrethroids.

It is now two years since we advi sed the previous conference on the progress of the trials so will take this opportunity for a further update.

All insecticide management decisions require a solid platform of reliable data and this can only be achieved by a long term committment to pesticide studies, obtaining baseline susceptibility data and monitoring of ch

Four cotton breeding programs have been operating in Australia, three i n New South Wales and one in Queensland .

The frequency of resistance to synthetic pyrethroids in Heliothis armigera has been monitored in the Namoi Valley since the introduction of the insecticide resistance management strategy in 1983.

The objective of the cotton breeding programme is to breed cultivars which are adapted to central Queensland environments.

Host Plant resistance is one such method and has been adopted in developing plant resistance to a range of plant problems. Plants posses both natural physiological and chemical defence mechanisms.

in the Gwydir Valley where the water resource has been over committed to such an extent that a full allocation of water will only be realized only SO years out of every 100 years.

Currently in Australia there are approximately 700 cotton germplasm accessions located with CSIRO, QDPI and a few private seed companies.

This review of the literature referring to A. macrospora indicates the extent of current knowledge about the pathogen and the disease it causes.

To investigate soil response to compaction, a range of cracking clay soils (Vertisols) were collected from major cotton growing areas in Queensland and subjected to a uni-axial-compression.

Nematodes are regarded as a major pest of cotton in many parts of the world. It has been claimed that "nematodes cause economic losses to cotton everywhere it is grown" (Watkins. 1981).

The presence of right-angle bending in cotton tap roots clearly shows the restrictions which degradation of soil structure imposes on cotton growth.

In recent times cotton growers have seen the need to adopt new land preparation practices. In the Macquarie Valley alone, only 35% of the 1987/88 cotton crop was prepared using conventional techniques.

Proper nutrition is one of the many factors necessary in achieving the high yield and quality standards we have set for our cotton crop.

It rained a lot, and much cotton was picked on wet soil - but how much damage was, or will be, done to the soil? It is worth bearing in mind the description given in the handbook on Soil Management by Davies et al.

Dr Daly Travel Australian Cotton Conference