Root-knot nematodes

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University of Hawaii,
Is this a Minor Pest?
Minor Pest Title

Root-knot nematodes (Meloidogyne spp.)

Minor Pest Description

Various species of Meloidogyne cause galls or swellings on the fleshy tap-root. In warm climates M. incognita, M. javanica and M. hapla are the main species causing problem. The disease is a problem in carrots grown in sandy soils.

Minor Pest What to do.
  • Plant resistant hybrids where available.
  • Practice crop rotation with cereals and fodder grasses.
  • A 3-year stop for all Apiaceae and Chenopodiaceae crops and a 4 to 5 year stop for legumes is needed to interrupt the life-cycle of these nematodes.
  • Soil amendments with neem cake or extracts are recommended.
  • Where feasible, practice at least 1 year fallow cultivation.
Minor Pest Position
Minor Pest Firstcontent
Pest Type
nematodes (Pests)
Other Crops
Host Plants
Carrot (Revised)