That also means about 40 to 60 per cent of the soil surface must be covered by plant material, which absorbs the winds energy and reduces particle movement. Not burning stubble Direct drilling with machinery capable of handling the stubble that is present. The seeding operation may bury up to 30 per cent of the stubble. Protecting high risk hill tops prone to erosion, through not sowing, under-sowing with cereal, or reducing the herbicide rate. Grazed lupin stubbles are also susceptible to wind erosion.
Rotations can greatly influence the risk of disease.
It is preferable to grow lupins after a cereal crop, retaining the cereal stubble on the soil surface. Brown Spot is caused by the fungus Pleiochaeta setosa and is responsible for yield losses throughout the State. The effects of this disease are significant in that they dictate rotational break and crop establishment methods over most of the State. The development of new varieties with a higher tolerance to brown spot such as Tanjil and Myallie, can help overcome the risk of yield loss. Management is important in the control of brown spot.