Pacific Pests, Pathogens and Weeds - Online edition

Pacific Pests, Pathogens, Weeds & Pesticides

Celery root knot nematode (254)

Click/tap on images to enlarge
  • Worldwide distribution. In tropics and sub-tropics. Apart from celery, common vegetable hosts are beans, capsicum, carrot, cucumber, eggplant, ginger, lettuce, potato, tomato, and yam; common fruit crop hosts are melon, papaya, and pineapple, and many ornamentals. An important nematode disease.
  • Above ground, leaves yellow with brown margins, wilt and die early; below ground, galls on roots.
  • Eggs in soil hatch, young larvae enter root behind the tip, and cause cells to swell and galls to form.
  • Cultural control: important - pasteurise nursery soil or use soil-less mixes; add organic matter; solarise soil for 4-6 weeks under black plastic; keep soil well-watered and use mulch; collect and burn trash after harvest; fallow land for 4-6 months; rotate with e.g., more tolerant maize, peanuts, onions, brassicas, chilli, sweetpotato, or sorghum x Sudan grass hybrids, green panic grass, or grow marigold cover crops.
  • Chemical control: none recommended.
Common Name

Root knot nematode. General account of root knot nematodes (see Fact Sheet no. 127).

Scientific Name

Meloidogyne species. Meloidogyne hapla, Meloidogyne incognita, and Meloidogyne javanica all attack celery.

AUTHOR Grahame Jackson
Information from (including Photo 2) Diseases of vegetable crops in Australia (2010). Editors, Denis Persley, et al. CSIRO Publishing. GrowVeg (undated) Celery root knot nematodes. (; and Westerdahl BB, et al. (undated)  Celery Nematodes. University of California Statewide IPM Program. Agriculture and Natural Resources, University of California. (; and from Root-knot nematode (2017) Department of Agriculture and Fisheries. Queensland Government. Photo 1 Gerlach WWP (1988) Plant diseases of Western Samoa. Samoan German Crop Protection Project, Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) Gmbh, Germany.

Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.

Copyright © 2022. All rights reserved.