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November 2018

Root rots in pulse crops 

Growing conditions in 2018 have caused stress in many pulses leading to root rot infection in numerous crops across South Australia. Crop species affected include lentil, faba bean, chickpea, vetch, lupin, lucerne and clover. This phenomenon is being investigated by Dr Tara Garrard at SARDI, in a SAGIT funded project, (S218) Survey Potential Emerging Pulse Root Diseases.

Could you be experiencing root rot in irrigated chickpeas?

Phytophthora root rot was prominent in irrigated spring sown chickpeas in 2017 in the south east region of the state. Growers who are seeing poor performing areas in spring sown chickpeas are encouraged to submit samples for pathogen identification.

3 pathogens seen affecting high rainfall areas and irrigated crops

In high rainfall areas we have been seeing:

  • Aphanomyces
  • Pythium
  • Phytophthora.

Stressed plants from dry soils can be prone

Stressed plants growing in dry soils can be more prone to:

  • Fusarium
  • Rhizoctonia root rot.

DNA sequencing detecting root pathogens

A number of root pathogens have been detected through DNA sequencing including Rhizoctonia, Fusarium, Aphanomyces, Pythium, root lesion nematode and Phytophthora species.

Send us your samples from irrigated crops!

Sample from 1-2 poor performing locations within the paddock, aim for 3-4 plants per location.

  1. Shake soil off plant roots and wrap in paper towel.
  2. Include cultivar, as well as location of the crop, along with contact details.
  3. Send package to:
    Tara Garrard, Field Crop Pathology, SARDI
    Locked Bag 100, Glen Osmond SA 5064
Contact Tara Garrard for more details: tara.garrard@sa.gov.au
 

Crop Watch needs you!


You can contribute to Crop Watch by:
  • reporting your local disease observations
  • collecting and sending diseased plant samples.
See how to contribute.
 
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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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