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

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

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.

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

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.

Ecological genetics is the study of genetic changes and how these are influenced by the biological parameters of a species.

The aim of the Heliothis identification project is to develop a simple kit that can be used by field workers to distinguish quickly and reliably between individual eggs and small larvae of Heliothis armigera and H.

Over the last two growing seasons, sampling studies have been conducted to compare the distribution and abundance of Heliothis on different cotton varieties and to test the validity of the SIRA TAC equations which exp

The potential for extensive adult movements is one of the key factors contributing to the success of Heliothis spp. as pests (Farrow & Daly 1987, Fitt 1989).

Information about the frequency and intensity of immigration and emigration movements is essential for forecasting Heliothis infestation levels in crops, and thus for developing more efficient strategies for managing

The last year has seen a growing public concern over the use of chemical pesticides for the control of insect pests in cotton at a time when the Cotton Industry itself is still facing the real risk that these chemical

The pattern of flight activity within or between habitats or crops is dependent upon the distribution of those habitats/crops in both space and time.