Field work was conducted over the 1988/89 and 1989/90 cotton growing seasons in the Central Highlands of Queensland. Pheromone dispensers, specially formulated for P.

The aim of the project was to test the feasibility of using DNA probes to enumerate microorganisms involved in the degradation .of herbicides in soil.

To provide adequate access to computing facilities for SIRATAC, Trichogramma and Heliothis Ecology/Modelling projects at the Toowoomba Laboratory

This project continued the major study of waterlogging on heavy clay soils after furrow irrigation or heavy rainfall.

The use of pyrethroid insecticides on Helicoverpa armigera susceptible crops has been restricted to only 6 weeks each summer since 1983, when resistance to pyrethroids was diagnosed.

This project was concerned with providing fibre quality data on research, especially breeding, samples. It was run by the Division of Textile Industry at Geelong, Victoria.

The VAX cluster at Myall Vale is an important and essential facility for research and for the use of SIRA TAC by the industry.

The new truck for plant breeding use has been purchased.

This study determined the genetic basis of pyrethroid resistance in Heliothis annigera and characterised those factors that lead to cyclical fluctuations in the frequency of resistance in field populations.

The objective for this project was to field test the basic pest management version of SIRA TAC Plus and to educate SIRATAC Ltd field staff in the use of SIRATAC Plus.

The objective of this project was to provide enhancements to a partially established network of Apple Macintosh microcomputers and central VAX. microcomputers.

Australian Insecticide resistance mangement Strategy

This project continued the major study of waterlogging on heavy clay soils after furrow irrigation or heavy rainfall.

The project DAN 33L involved studies of insecticide resistance in the major cotton pests Helicoverpa armigera and Helicovera. punctigera.

The number of methods of marketing open to Australian cotton growers has increased in recent years, providing growers with an opportunity to better manage financial risk.

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The main aim of this trip was to report to the international scientific community on the progress of the Insecticide Resistance Management St(ategy that has been implemented in Australia to contain pyrethroid and endo

Summary of results: A 30hp Kubota tractor fitted with an air conditioned safety cab was purchased from the government contract supplier in Sydney.

AIMS 1. To determine the mechanical and physical consequences of land preparation and harvesting on the soils and to relate these effects to soil water content. 2.

The objective of this project was to evaluate preliminary and advanced breeding selections from the Narrabri and Biloela programs at up to five locations in Queensland.