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

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

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

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.

Summary of Key Results 1 Most promising techniques for use by advisory staff in the field are penetrometers and root morphological characteristics. 2 Soil smearing may not have significant effects on plant growth.

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.

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.

A complex of pests attacks the Australian cotton crop, none more important than the cotton bollworm, Heliothis armigera. and insecticides are considered necessary for its control. H.

As most cotton is exported the cotton industry has a high exposure to exchange rate fluctuations.

Last year I spent several months at Rothamsted Experimental Station in the U.K., as a Churchill Fellow, studying biochemical toxicology in H.

Many cotton growers are asking Why can't Australian cotton mills spin more cotton?" Many hundreds of thousands of bales of cotton are imported into Australia as finished yarns and fabrics - why can't th

During the 1988/89 cotton season trials were conducted to evaluate the potential of synthetic pheromones to control the pink -spotted boll worm, Pectinophora scutigera, by mating disruption