Lupin growers to keep an eye out for Lupin anthracnose

In the eastern Riverina region of NSW in October 2016 lupin anthracnose was detected for the first time in commercial crops. The disease is present in WA and SA but still remains a notifiable exotic disease in NSW and Victoria. Natural hosts of lupin anthracnose are not established in NSW and as the infected crops were relatively isolated, successful eradication of the disease was considered possible and an eradication program is now in place.

The lupin anthracnose biosecurity zone (which encompasses the Local Government Areas of Cootamundra/Gundagai, Junee and Coolamon) has special conditions including restrictions on the growing and sale of certain lupins within the zone.

There are no restrictions on growing lupins outside of the lupin anthracnose biosecurity zone in NSW and Victoria.

Lupin anthracnose threatens the viability and future of NSW and Victoria’s lupin industries. Growers and agronomists are strongly encouraged to be vigilant this season, familiarising themselves with symptoms and inspecting crops at least once every 6 weeks. Although symptoms more commonly appear around flowering, seedling infections can still occur.

The most obvious symptom is bending and twisting of stems at the site of a lesion (forming a shepherds crook) which is particularly noticeable when the crop is flowering (Figure 1). Oval shaped lesions on stems contain a beige pink spore mass with an oozy appearance (Figure 2). If infection occurs early in the season lesions can be found on seedlings.

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Figure 2. Oval shaped lesions on stems contain a beige pink spore mass with an oozy appearance. Image: Kurt Lindbeck.

Figure 2. Oval shaped lesions on stems contain a beige pink spore mass with an oozy appearance. Image: Kurt Lindbeck.

Five point management plan

A five point management plan is recommended for all lupin producers in NSW and Victoria to prevent establishment and spread of the disease.

  1. Treat seed for sowing with a fungicide seed treatment containing thiram
  2. Separate this year’s lupin crop away from last year’s lupin stubble
  3. Control volunteer lupins on your property
  4. Control machinery and people movement into and out of lupin crops
  5. Apply a foliar fungicide at 6-8 weeks post emergence (with a grass herbicide if suitable) using fungicides containing mancozeb, chlorothalonil or azoxystrobin, and a follow up at pre-canopy closure

Reporting and Sampling

Lupin anthracnose is a notifiable disease in NSW and Victoria, and any suspected infected crops must be reported via the details below.

Samples can be sent by following these instructions to the contacts below:

  • Sample plants that show unusual symptoms
  • Wrap the plants in damp (not wet) paper towel and seal in both a plastic container and ziplock bag, or two ziplock bags
  • Send the sample by express post early in the week. A cold pack is not needed

NSW

Call the Exotic Plant Pest Hotline on 1800 084 881 or email clear photos with a brief explanation and contact details to: biosecurity@dpi.nsw.gov.au

Send samples to:
Dr Kurt Lindbeck
NSW DPI, Wagga Wagga Agricultural Institute,
Pine Gully Road,
Wagga Wagga NSW 2650
Phone: 02 6938 1608

Sample submission forms are available on the NSW DPI website

Anyone involved in the production of lupins in NSW, including (but not limited to) growers, agronomists and contractors, have a responsibility under the Biosecurity Act 2015 to put in place measures to prevent, eliminate or minimise biosecurity risks, including the obligation to report unusual and notifiable pests and diseases.

 Victoria

Call the Exotic Plant Pest Hotline on 1800 084 881 or CropSafe on (03) 5362 2111or email clear photos with a brief explanation and contact details to: crop.safe@ecodev.vic.gov.au

 Send samples to:

CropSafe
110 Natimuk Rd
Horsham 3400

Cropsafe sample submission forms are available on the Agriculture Victoria website.

Further information

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