Grains and field crops
Leaf disease in the wheatbelt. Wheat leaf diseases were common north of Perth. They were severe in the Moora district and catastrophic in the northern wheatbelt. Yellow spot (Pyrenophora tritici-repentis) and glume blotch (Septoria nodorum) were the major pathogens in most areas with yellow spot exceeding glume blotch in area of leaf affected for the first time since surveys began in 1971. In the south dry conditions prevailed and diseases were hard to find. Figure 1 gives the distribution in the various zones for 1983 excluding the Esperance district which was not surveyed. Stress damage induced mostly by water stress was present on most samples except those from the northern zone. However, the incidence was much lower than in 1982 particularly in the southern areas. Fungicides to control Septoria. Burning stubble for continuous wheat cropping (D. Sawkins 82M030,31. Table 3 Effect of stubble burning on continuous wheat (1) Gabalong-Grey Clay (82M031). Fungicides on Septoria nodorum. Table 4 Fungicides on Septoria nodorum, Badgingarra 1984 Disease at Zadoks stage 55/63 and yield (t/ha-1). Variety Gamenya.
Number of Pages
Brown, A G. (1983), Foliar diseases of wheat. Department of Agriculture and Food, Western Australia, Perth. Report.