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VOLUME 15, NUMBER 3,  September 2018


A dry year so far for most areas has meant leaf diseases in grain crops are a low threat this season in SA. This does not however mean that all crops are risk free. Growers should therefore be alert to any specific risks and keep us informed of any new observations.

Ascochyta Blight of Chickpeas

Severe ascochyta blight infection has been seen in a number of Genesis090 and PBA Monarch chickpea crops in SA, including upper YP and lower north regions. Despite the drier than average season, this disease is able to cause significant crop damage and yield loss. Growers are urged to apply fungicides ahead of rain events to prevent infection or reduce disease spread; and use higher label rates in infected crops to increase efficacy.  

Cereal Rusts

Rusts have been at a very low level in cereal crops in SA this season. Up to the end of August none has been reported in wheat. However barley leaf rust has been observed at a high level in one paddock of Compass with the Star of Bethlehem weed that also hosts the rust (see photo). With the possible exception of long season cropping areas, wheat crops are unlikely to benefit from fungicide sprays for rusts.
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Crop Watch is a FREE service providing updates throughout the growing season on an “as required” basis to keep growers and advisers informed about disease-related issues and solutions. Crop Watch is produced by the South Australian Research and Development Institute's (SARDI) pulse and cereal pathology experts and is supported by the Grains Research and Development Corporation (GRDC). Your support and feedback are essential to the success of Crop Watch.
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Primary Industries and Regions SA · 25 Grenfell Street · Adelaide, SA 5000 · Australia

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