Apply fungicide to control Ascochyta in previously resistant chickpea crops

Ascochyta blight in Genesis 090 chickpeas. Source: Peter Wendt

Ascochyta blight in Genesis 090 chickpeas. Source: Peter Wendt

Chickpea growers in South Australia are advised to apply preventative fungicide sprays in chickpea crops ahead of rain events for Ascochyta blight control and continue to monitor the disease after reports of disease on previously resistant varieties.

Following on from reports of severe Ascochyta blight affecting previously resistant chickpea varieties in the Victorian Mallee pulse pathologists from SARDI have found further Ascochyta on previously resistant chickpeas in South Australia.

Senior Pulse Pathologist, Jenny Davidson has observed severe Ascochyta infection on PBA Striker crops, with moderate infection levels on previously resistant Genesis090 crops, and also in other varieties. Ascochyta blight has been observed in crops across the lower north, mid north and Yorke Peninsula regions of SA.

Growers and advisors are advised to spray chickpea crops now prior to rain events, follow up with regular monitoring and apply additional preventative fungicide sprays during spring in order to avoid losses.

All crops will require fungicide sprays during podding, ahead of rainfronts, to prevent infection on pods which results in seed abortion and seed staining.

Further information on fungicide application is available in the Chickpea Ascochyta Blight management guide from Pulse Australia and you can access current minor use permits from the APVMA here.

Key management recommendations

  • Apply a preventative fungicide spray early ahead of rain events
  • Monitor chickpea crops, even previously resistant varieties, closely for Ascochyta blight as the disease can take hold quickly
  • Plan ahead – there is a limited supply of many fungicides in 2016 so if you think you may need to apply fungicides speak with your supplier.

Reporting Ascochyta on resistant varieties

Pulse growers across the southern region have been advised to keep a line of sight on Ascochyta blight in resistant pulse crops. SARDI pathologist Jenny Davidson recently advised growers to report any breakdown in resistance immediately after confirmed loss of resistance in:

  • Nipper lentils across SA and Victoria,
  • Farah faba beans;
  • and partial loss of resistance in PBA Rana faba beans in Mid North SA.

Growers and advisors can report any anomalies in pulse crops including chickpeas to Jenny Davidson by phone 08 8303 9389 or email jenny.davidson@sa.gov.au.

Further information

 

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