Sloop, Franklin and Gairdner are best sown away from infected stubbles. The severity of these diseases and scald in 1999 will depend very much on the time of seeding and subsequent crop moisture. Stem rust is a threat to susceptible wheat crops sown in the long season areas following the build up of inoculum at the end of 1998. Only resistant varieties should be sown in 1999. There is only a moderate risk of take-all for 1999 but the risk is higher in the Northern Mallee where good spring rains allowed inoculum of the disease to build up.
Wheat is a good host for both nematodes although there are differences between varieties.
Barley and oats are moderately good hosts for both nematodes. Vetch crops are poor hosts to P neglectus but very susceptible to P. thornei . Canola is a good host to P neglectus but moderately resistant to P. thornei . Triticale, rye, lupins, peas and faba beans are poor hosts for both species and act as break crops. Of the grass weeds, wild oat is a good host for P neglectus and barley grass a good host for P thornei .