Heliothis spp. are clearly the major pests of Australian cotton and consequently there has been considerable research on their biology, ecology and control (Zalucki et al 1986).

Rainfed cotton has been grown in Central Queensland since the 1920's but the total area has fluctuated in response to variable seasonal conditions as well as changing prices and market trends for cropping options

In dealing with nitrogen and Pix, points to put the issues in context are that nitrogen is the most important because it can increase yield by much more than a growth regulator such as Pix can.

An important question is the area of origin of these spring immigrants. Over the last 3 years, we have been investigating the ecology of Heliothis spp. in inland Australia (Gregg et al. 1987, 1989).

Agenda Fifth Australian Cotton Conference ,Hotel Conrad and Jupiters Casino,Broadbeach, Gold Coast, Queensland

The objective of the experiments reported in this paper is to determine the fate of fertilizer nitrogen applied to the grey clays in the Namoi Valley.

Heliothis spp.

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

Waterlogging can affect both the availability of micronutrients in the soil and the plant's ability to absorb nutrients from the soil.

The purpose of our four-year study on the Darling Downs was 1) to investigate the population dynamics of heliothis and to quantify the significance of the major controlling influences (parasites, predators, pathogens,

SOILpak is a soil management manual for cotton growing on cracking clays. It leads you through the decision-making process to a number of options. The manual presents options rather than hard-and-fast rules.

The Bureau of Rural Resources has estimated the area in central Queensland potentially suitable for raingrown cotton production at 60-80,000 ha.

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?

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

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.

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

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

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