The aim of the present work is to assess the usefulness of pteridines in determining the age of adults of P. scutigera.

All insecticide management decisions require a solid platform of reliable data and this can only be achieved by a long term committment to pesticide studies, obtaining baseline susceptibility data and monitoring of ch

To understand, and predict, Heliothis dynamics on cotton, along with changes in resistance levels, we must understand their dynamics on other hosts and the patterns of movement from these to cotton.

The frequency of resistance to synthetic pyrethroids in Heliothis armigera has been monitored in the Namoi Valley since the introduction of the insecticide resistance management strategy in 1983.

in the Gwydir Valley where the water resource has been over committed to such an extent that a full allocation of water will only be realized only SO years out of every 100 years.

SIRATAC users have the option early in the season of using standard thresholds or dynamic thresholds which vary between the standard level and an upper limit.

Host Plant resistance is one such method and has been adopted in developing plant resistance to a range of plant problems. Plants posses both natural physiological and chemical defence mechanisms.

The Siratac system when it was originally conceived had no database system included in the workings of the system.

You are all aware that currently there are three varieties available commercially: Siokra 1-2, Sicala 3-1 and DP90 (Deltapine - Acala) .

To investigate soil response to compaction, a range of cracking clay soils (Vertisols) were collected from major cotton growing areas in Queensland and subjected to a uni-axial-compression.

In recent times cotton growers have seen the need to adopt new land preparation practices. In the Macquarie Valley alone, only 35% of the 1987/88 cotton crop was prepared using conventional techniques.

Seedling diseases include seed rots, pre and post emergent damping 9ff and root pruning. Numerous fungi can be responsible although Rhizoctonia sp., Pythiwn spp. and Fusarium spp. are the most important.

The presence of right-angle bending in cotton tap roots clearly shows the restrictions which degradation of soil structure imposes on cotton growth.

This Overview has been compiled after talking with a limited number of growers from most districts, and as could be expected there were some opposite opinions expressed.

It rained a lot, and much cotton was picked on wet soil - but how much damage was, or will be, done to the soil? It is worth bearing in mind the description given in the handbook on Soil Management by Davies et al.

The actual decision regarding which seed variety to plant had to be made some months -ago by growers through CSD, this decision is mostly based upon a number of factors, viz: 1: Yield 2: Resistance to insects and dise

This paper address why there are differences in the soils of the lower Namoi Valley.

One of the aims of this project is to assess the N fertiliser requirements of cotton under more enlightened tillage systems currently being adopted.

The major Australian cotton yarn spinners are encouraged by the improvements the researchers and the growers have managed to obtain in the newer varieties.

The successful application of Agrochemicals involves an understanding of the:- target, product, equipment, droplet behaviour, and the environment.