The initial phase of .the project was devoted to the selection and testing of analytical techniques for assessing total nitrogen and leaching losses, and gaseous losses of nitrogen by ammonia volatilization and denitr

This project involved the purchase of equipment to measure the surface water inputs and outputs of two commercial scale cotton fields.

To measure the effect of biotic factors (host crop, body size) and abiotic factors (temperature, humidity) on reproductive development, fecundity and longevity of adult Heliothis punctigera and H.

OBJECTIVES (i) To evaluate the reliability of current SIR.A TAC sampling procedures and conversion equations relating proportion infestation to mean number of insects per plant.

Aims: (i) to quantify the contribution of alternative host crops to the dynamics of Heliothis on cotton using an elemental analysis technique developed in a previous project.

To quantify movement of Heliothis adults Into cotton crops from local and distant source regions.

Aims 1. Promote awareness of the importance of soil management 2. Collate existing research results and practical knowledge of the management of irrigated cracking clays. 3.

This project was concerned with the transfer of cotton fibre testing from the Division of Wool Research, Geelong Victoria to the Cotton Research Unit at Narrabri Agricultural Research Station (NARS).

A 20 saw gin was bought for $13,000 from the USA. It was installed and fitted with a motor in time to be used in the 1991 harvest It operated satisfactorily throughout the 1991 season.

The main aim of this project was to develop a low-cost multispectral airborne video imaging system (referred to as MAVIS) for detecting and monitoring spatial and temporal variations in the vigour of irrigated cotton

Aims: *Use data which relates mite numbers to yield loss in order to derive and test action thresholds.

When it comes to varieties 1 don't believe that the growers needs will ever be totally met, we are always looking for improvement in varieties to satisfy, not only the ever tightening cost-return squeeze, but we

Small parasitic wasps, scientifically known as Trichogramma, are used as biological control agents of moth pests in overseas countries, thereby reducing the need to use insecticides.

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 Australian Field Crops Resistance Management Strategy has been in place now for 7 seasons.

This paper is aimed at presenting some aspects of this debate and seeks to answer the following questions: *Are the dryland industrys needs being met by the spin-offs from the current breeding program?

As cotton is naturally sensitive to a range of herbicides used for the control of broadleaf weeds, post-emergence suppression of such weeds is limited to relatively inefficient lay-by herbicides and mechanical means i

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.

Plants encounter many environmental stresses such as droughts, flooding, extreme temperatures and high salt concentrations just to name a few.

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