Chinese Cabbage — Major Pests and Damage Symptoms

Overview

Chinese cabbage (Brassica rapa subsp. pekinensis) is an important global vegetable. Insect pests significantly affect yield and quality. This report summarizes internationally recognized pests, scientific names, damage characteristics, and typical environments. Photo guides are available from universities and public agencies.

Major Pests and Damage

1. Diamondback Moth (Plutella xylostella)

• Among the most important brassica pests worldwide; multiple generations; widespread insecticide resistance[1][2][3].
• Small green larvae with diamond dorsal pattern; drop on silk when disturbed.
• Irregular holes and window-paning; severe skeletonization[1].

2. Imported Cabbageworm (Pieris rapae)

• Very common globally; white butterflies; velvety green larvae with yellow stripe[1][3][4][5].
• Irregular holes and green frass on leaves[1].

3. Armyworms (Spodoptera litura, S. exigua)

• Widespread in tropics/subtropics/temperate zones; severe defoliation especially on young plants[1][3][5].
• Smooth green to brown larvae with stripes; group feeding on young leaves[1][3].

4. Cabbage Looper (Trichoplusia ni)

• Major on cabbage family crops worldwide[3][5].
• Pale green looper movement; large irregular holes and abundant frass[1].

5. Flea Beetles (Phyllotreta spp.)

• 2–3 mm jumping beetles worldwide[3][6].
• Shot holes in leaves—often lethal on seedlings[6].

6. Cabbage Aphid (Brevicoryne brassicae)

• Global; dense gray-green colonies on buds and leaf undersides[1][3][4][5].
• Leaf curl, yellowing, honeydew, sooty mold[1].

7. Cabbage Root Maggot (Delia radicum)

• Important in cool temperate regions[1][7].
• White maggots bore roots and stem base—wilting, plant death[7].

8. Harlequin Bug (Murgantia histrionica)

• Americas and warm regions[1][5].
• Sap feeding causes white/yellow spots and tie-dye-like discoloration[1].

9. Cross-Striped Cabbageworm (Evergestis rimosalis)

• Eastern Americas and East Asia[1][5].
• Skeletonization; damage to buds and heart leaves[1].

10. Cutworms (Agrotis ipsilon and others)

• Global seedling pests—cut stems at soil line[1][8].

11. Regional Pests

• Cabbage webworm (Hellula undalis) in warm Asia/Africa/Oceania—larvae web and bore into hearts[9].
• Other regional species reported[1][9].

Regional Damage Patterns

• Dominant pests vary by climate but the above are stable primary pests in most zones.
• Armyworms and leaf miners favor warm regions; root maggot and aphids favor cool areas[3][4].
• Insecticide resistance and extra generations are increasing[3][4].

IPM Reference

• IPM combining cultural, biological, physical, and chemical tactics is recommended[3][5][7][8].
• Early detection, natural enemies, mulches/covers, rotation, and residue management[3][8].

Conclusion

Accurate recognition of major Chinese cabbage pests and symptoms—holes, skeletonization, curling, wilting, root maggots—is essential for timely control. Global standards align on diamondback moth, aphids, cabbageworms, loopers, flea beetles, and root maggot as core targets for IPM.

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Sources

[1] Identification of Common Insect Pests of Brassica Crops — Clemson Cooperative Extension
https://lgpress.clemson.edu/publication/identification-of-common-insect-pests-of-brassica-crops/

[2] Brassica rapa subsp. pekinensis | CABI Compendium
https://www.cabidigitallibrary.org/doi/full/10.1079/cabicompendium.10115

[3] Cabbage Pests: Identification, Damage, and Control Methods — CABI BioProtection Portal
https://bioprotectionportal.com/resources/cabbage-pests-identification-damage-and-control-methods/

[4] Cabbage Pests - UK Entomology - University of Kentucky
https://entomology.mgcafe.uky.edu/ef300

[5] Chinese Cabbage // Missouri Environment and Garden News Article — University of Missouri
https://ipm.missouri.edu/meg/index.cfm?ID=213

[6] Important insect pests that attack Brassicaceae plants worldwide
https://www.researchgate.net/figure/mportant-insect-pests-that-attack-Brassicaceae-plants-worldwide_fig3_224016972

[7] Pests of Cabbage and Other Crucifer Crops in Micronesia — University of Guam Extension
https://www.uog.edu/_resources/files/extension/publications/Pests_of_Cabbage_in_Micronesia.pdf

[8] PlantVillage: Chinese cabbage | Diseases and Pests, Description, Uses, Propagation
https://plantvillage.psu.edu/topics/chinese-cabbage/infos

[9] Brassica Pests and Diseases | Winter 2025 Webinar — YouTube/UMass
https://www.youtube.com/watch?v=XXXXXXXX

[10] Economically Important Insects on Cruciferous Crops (Brassicaceae)
https://zoolstud.sinica.edu.tw/Journals/64/64-30.pdf