Biosecurity Alert - Serpentine Leafminer
ABOUT SERPENTINE LEAFMINER
Serpentine leafminer (Liriomyza huidobrensis) is an insect pest that is exotic to Australia which has now been detected in NSW.
This insect pest is a serious threat to a wide range of industries including vegetable crops including beans, cabbage, capsicum, celery, chilli, cucumber, eggplant, lettuce, onions, peas, potatoes and tomatoes. A number of ornamental plants including cut flowers such as chrysanthemums and gerberas are also known to host serpentine leafminer.
The pest was first detected in NSW on 22 October 2020 in Western Sydney. On 28 October, the identity of the pest was confirmed to as serpentine leafminer. During November 2020, subsequent detections were made in the broader Sydney area, Orange and the Central Coast of NSW, as well as the Fassifern Valley in Queensland.
Early detection is vital to minimising the spread and impacts of serpentine leafminer in NSW.
HOW TO IDENTIFY SERPENTINE LEAFMINER
The patterns created in the surface of infested leaves are more easily identified than the insect itself. Look for the following signs of serpentine leafminer damage:
- Twisting trails that appear whitish on the surface of the leaf
- Trails that become longer and wider as the larva grows
- Heavily mined leaves may also show large whitish blotches.
Serpentine leafminer larvae are yellow to white in colour but are often concealed beneath the leaf surface.
Adult serpentine leafminers present as tiny flies. Flies are less than 3 mm long and grey-black with yellow markings. Adult flies are not possible distinguish from other Liriomyza flies in the field and will need to be sent to NSW DPI for identification.
For more information visit the DPI website.
YOUR GENERAL BIOSECURITY DUTY
Part 3 of the Biosecurity Act 2015 describes how people have a General Biosecurity Duty to prevent, eliminate or minimise the risk of serpentine leafminer in NSW. People dealing with serpentine leafminer host plants which have visible signs of leaf miner damage must act to ensure they are meeting this General Biosecurity Duty. Put simply, you must always act to prevent further spread of serpentine leafminer in NSW, eliminate heavy infestations of the pest and minimise the impacts of serpentine leafminer in plant production systems.
HOW TO REPORT SUSPECT SERPENTINE LEAFMINER CASES
If you suspect serpentine leafminer you must report it immediately to NSW DPI.
Serpentine leafminer is a notifiable plant pest in NSW. All notifiable plant pests and diseases must be reported within one working day.
You can report notifiable plant pests and diseases by one of the following methods:
- Call the Exotic Plant Pest Hotline 1800 084 881
- Email firstname.lastname@example.org with a clear photo and your contact details
- Complete an online form.
A full list of notifiable plant pests and diseases can be found in Schedule 2 of the NSW Biosecurity Act 2015.
- Reporting and Testing for Serpentine Leafminer PDF, 691.84 KB
- Management of Serpentine Leafminer PDF, 320 KB
- Chemical management options for serpentine leafminer
- Host species list for serpentine leafminer
- The General Biosecurity Duty for Serpentine Leafminer PDF, 184.8 KB
- Primefact - Serpentine leafminer PDF, 588.11 KB
- Poster - Serpentine leafminer PDF, 6841.49 KB
- Flyer - Serpentine leafminer PDF, 11452.79 KB
- Translated Poster - Simplified Chinese PDF, 3509.75 KB
- Translated Poster - Arabic PDF, 3552.56 KB
- Translated Poster - Khmer PDF, 3533.5 KB
- Translated Flyer - Simplified Chinese PDF, 3695.61 KB
- Translated Flyer - Arabic PDF, 3743.77 KB
- Translated Flyer - Khmer PDF, 3751.13 KB
- Serpentine leafminer detected in Western Sydney (11 November 2020)
Find out more about plant, pests and diseases here.