Pacific Pests & Pathogens - Mini Fact Sheet Edition
Cabbage leafminer (377)
- Widespread distribution. In Oceania, several Pacific island countries. A major pest of many important vegetables in the cabbage and legume families, and weeds. Identification needs taxonomic expertise.
- Damage: Eggs laid both sides of leaf under epidermis. Larvae make irregular, pale-coloured mines in leaves that gradually widen; mines have dark green line of faeces in middle. Pupation is in the soil. Adults take sap from leaves (females only) and feed on nectar.
- Spread is by flying and via international horticultural trade.
- Biosecurity: trade in horticultural produce across national borders is a risk and needs careful regulation.
- Natural enemies: many predators and wasp parasitoids.
- Cultural control: weed, nursery and field; plough exposing pupae before planting; check nursery plants before planting out; avoid overlapping crops; handpick or squash leaves with mines; high-value crops - cover soil with mulch preventing adults emerging; collect and burn debris after harvest.
- Chemical control: biorational i) insecticidal soap, white or horticultural oils; ii) botanicals (chillies, neem, derris, pyrethrum); iii) microbials (abamectin, spinosad). Avoid organophosphates and synthetic pyrethroids.
Cabbage leafminer, Serpentine leafminer (the same common name is given to other leafminers (see Fact Sheets nos. 110, 259, 262 & 377)
AUTHOR Grahame Jackson
Information from CABI (2018) Liriomyza brassicae (sepentine leafminer). Crop Protection Compendium. (www.cabi.org/cpc); and from Martin NA (2017) Cabbage leafminer - Liriomyza brassicae. Internesting Insects & other Invertebrates, Plant & Food Research. (https://nzacfactsheets.landcareresearch.co.nz/factsheet/InterestingInsects/Cabbage-leafminer---Liriomyza-brassicae.html). Photos 1&2 P Ridland. Polyphagous Agromyzid Leafminers. (http://keys.lucidcentral.org/keys/v3/leafminers/key/Polyphagous%20Agromyzid%20Leafminers/Media/Html/Liriomyza_brassicae.htm). Photos 3&4 Ella Pirtle, cesar, 293, Royal Parade, Parkville, Victoria, Australia. Photos 6&7 Peter Ridland. University of Melbourne, Victoria, Australia.
Produced with support from the Australian Centre for International Agricultural Research under project HORT/2016/185: Responding to emerging pest and disease threats to horticulture in the Pacific islands, implemented by the University of Queensland and the Secretariat of the Pacific Community.
This mini fact sheet is a part of the app Pacific Pests and Pathogens
The mobile application is available from the Google Play Store and Apple iTunes.
Copyright © 2019. All rights reserved.