Biological control represents one alternative to insecticides. The Cotton Research Council (CRC) has funded a project to study native egg parasites of Heliothis.

To the question "Can nutrition affect earliness?" the answer must be a definite Wes". Further, it will be just as important a factor as irrigation or pest management.

The study reported here concentrated. On these sap-suokinq bugs, which were reputed to damage seedling and early-squaring cotton

From before the first seed is planted, everything that 1s done, 1.e. selection of seed variety, to all cultural practices and 1nsect control must have one aim and that is earliness.

BACILLUS THURINGIENSIS use as an insecticide for 25 years despite formidable competition from conventional insecticides is largely due to its safety and compatibility.

Pest management is only one link in the cotton management chain. To produce an early crop it is essential that all links in that chain be securely welded together.

One such form is biological control, which relies on the use of natural pathogens and parasites to control the pest species.

Cotton growers commonly apply nitrogen (N) fertilizer at rates of between 100 and 200 kg N/ha, yet the cotton plants seldom recover more than 40% of the applied N, and often much less.

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

The CRC contracted Queensland Cotton and Siratac Ltd. to conduct a survey on the transfer of research information into the cotton industry.

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.

Conference Cover

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.

AUSTRALIAN COTTON CONFERENCE ACGRA 1988 members , Agenda , 1988

Determination of the petiole nitrate nitrogen concentration (PNN) in the youngest fully expanded leaf (YFEL) of cotton is a useful indicator of plant nitrogen status.

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

Well to satisfy everyones's curiosity, r will answer the question straight away. Yes, we can survive resistance! However, in answering it, I shall put another, perhaps even more thought provoking than the first.

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

As major pests of cotton production, Heliothis spp. are of most concern to growers during the summer when they are active and damaging crops. Once autumn arrives and the crop is picked, Heliothis are soon forgotten.

The Cotton Council has been funding our project, for which we intend to identify cotton varieties with efficiency of dry matter production when irrigation is expensive, or relatively inexpensive.