Each furrow irrigation waterlogs most of the root zone of cotton in cracking clay soils. This deprives the roots of oxygen, they take up less water and nutrients. and this reduces growth and yield.

Heliothis spp. have two main attributes which give rise to their pest status and make them difficult to manage (see Fitt this volume).

Answers to the questions : How do I find and use probes for scheduling irrigations? Are they used as the only scheduling tool? How do we use our water most effectively?

The development and release of SIOKRA, the new okra-leaf variety, has created considerable interest with respect to pest management.

This project was prompted by disappointingly low cotton yields at Emerald and other Central Queensland centres.

Firstly, it is important to define "Minimum Tillage" as it applies to our operation. Our objective in achieving such a system is more correctly described as a "Permanent Bed'' system i.e.

Early crop protection is a controversial subject in modern pest management. Grower magazines in Australia and the U.S. carry articles expressing firm opinions both for and against.

cover

The visits to research institutions proved extremely enlightening and valuable.

* Testing various versions of SIRATAC on a commercial scale. * Ptoviding a database of the response of cotton to damage. *Comparing the response of the new varieties Siokra and DP90 with DP61.

To determine the various factors affecting the loss of activity of insecticides on cotton over time.