Includes method for estimating yield.
Table gives application rates and approximate costs of four fungicides.
Yield reductions are most likely to occur in the southern cropping areas with more than 350 mm annual rainfall. Ascochyta can be mistaken for the less damaging disease, alternaria, and for simazine damage. Both from similar dark spots on leaves but without the grey centre with black pycnidia. Fungicide sprays can reduce disease severity and increase yield but are unlikely to improve seed quality. The decision to spray depends on the severity of the disease and the yield potential of the crop.