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Industry alert – Citrus canker (Xanthomonas citri pv. citri)

Tomato potato psyllid - nymph cases nymph and adult

Citrus canker on an orange

The Department of Agriculture and Fisheries (DAF) has issued a new Movement Control Order (MCO) (PDF, 3.4MB) Notice for citrus canker and carriers. The new MCO allows for the conditional movement of citrus fruit from a state or territory with a detection of citrus canker.

The new MCO commences on 24 September 2018 and will stay in effect for three months unless revoked earlier.

All Australian States have implemented movement restrictions and are revising entry conditions for citrus canker and carriers to allow for trade of citrus fruits from registered businesses that are within a Northern Territory or Western Australia citrus canker control area.

These measures are based on a Federal Government protocol to allow importation of fresh unshu mandarin fruit from Shizuoka Prefecture, Japan, to Australia.

Citrus canker (Xanthomonas citri pv. citri) also known as Xanthomonas citri subsp. citri, was detected in April 2018 in the Northern Territory and confirmed in May 2018. Detections in the in the north of Western Australia, linked to nursery plants imported from Darwin have also been confirmed.

Citrus canker is a contagious bacterial disease which affects all citrus plants. The disease can be spread rapidly over short distances by wind-blown rain, weather events and human movement, particularly in tropical and subtropical climates.  Infected plants display lesions which form on leaves, fruits and stems, resulting in low plant vigour and a reduction in fruit quality and quantity .

Citrus canker can also be spread between plants by machinery and any equipment used in the production of crops in the citrus family.

Movement restrictions will continue to apply to plants and plant material (including fruit) within the family (Rutaceae) and associated planting media and soil, machinery or equipment coming into Queensland unless they meet certain conditions outlined in the MCO.

See Revocation of previous citrus canker movement control order (PDF, 328.3KB)

If you suspect citrus canker on your property, report it immediately to the Exotic Pest Plant Hotline on 1800 084 881 or Biosecurity Queensland on 13 25 23.

For more information about how to identify citrus canker visit Plant Health Australia.

For more information about the citrus canker detection in the Northern Territory visit the Northern Territory’s Department of Primary Industries and Resources website.