The value of lucerne as a trap crop for cotton pests has been recognised in America for some time (Deloach and Peters 1972, Robinson et al. 1972, Sevacherian and Stern 1974).

The good news is that nutgrass can be controlled. The bad news is that successful control is a long-term venture.

In 1993 a series of experiments were established in the Namoi and Macquarie valleys to study the effects and benefits of rotation crops for subsequent cotton crops.

Irrigation is used to negate the climatic irregularities of rainfall.

Simulations were run to test the sensitivity of OZCOT to varietal differences in developmental characteristics known to influence fruiting dynamics in cotton.