This 3 year study examined the relationships between catches of Heliothis adults in monitoring traps and the abundance of eggs on cotton crops.

* 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.

The experiments reported here investigated the influence of high or low concentrations of nitrogen, phosphorus and potassium on the multiplication of X.campestris pv. malvacearum in cotton leaf tissue.

The visits to research institutions proved extremely enlightening and valuable.

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Bacterial blight of cotton is a major disease in most cotton growing countries of the world.

The threat of resistance has been realised, and no doubt will continue to be realised in the future. What then is the cost once resistance has developed?

Greg Constable and I have previously shown that in the Namoi Valley an irrigation water supply of 8 ML per ha is needed to obtain maximum yields in the driest years.

A review of overseas literature shows that several approaches have been recommended for the control of bacterial blight of cotton .

In the era of nearly total reliance on pesticides, there was general disregard of the fact that even the simplest agroecosystem presents a complicated maze or delicately balanced ecological interactions.

Factors which influence the efficacy of an NPV application These include: (i) the initial actjvity of the virus preparation, distribution (.i.i) lts rate or application and distribution on the crop, (Jji) Its persiste

As a result of a major fall in world cotton prices, the Namoi Cotton Co-operative has been actively looking at ways of reducing costs on cotton farms.