Nine insecticide trials were carried out for control of silverleaf whitefly. The evaluation of control performance was greatly hampered by the considerable variation in whitefly numbers.

The objectives of this project were: 1. To identify candidate pathogens for the biocontrol of purple nutsedge ( Cyperus rotundus). 2.

Farmers have probably always realised that soil is alive. Good soil seems to have certain intangible qualities, over and above its physical structure and chemistry. There is something special about topsoil.

A growth disorder of cotton has been observed in irrigated cracking clay soils in fields at Galathera Creek, north of the Australian Cotton Research Institute (ACRI) for several years.

Black root rot is caused by the fungus Thielaviopsis basicola (Berk. & Broome) Ferraris.