Paratrichodorus and Trichodorus species
The Stubby-Root Nematodes

  • Damage to Corn.   Although actual losses are often hard to measure due to Stubby-Root nematodes occurring together with other species,  Paratrichodorus is considered a major pest  on corn where populations are large.
  • Biology.   Paratrichodorus minor is small (less than 1 mm long) with a curved stylet.
  • Ecology.   Stubby-Root nematodes are common in sandy soils in the Atlantic and Gulf Coastal Plain states, and are also known in the Midwest, Oregon, and California.
  • Symptoms.   Field symptoms include stunting, chlorosis, and reduced yields.  P. minor feeds largely on the root tips,  stopping terminal growth of the rootlets, and resulting in the stubby-root effect.
  • Damage to other crops.   Stubby-Root nematodes have a wide host range, although corn is a favored host.
  • Control.  Chemicals often give effective control. Nonvolatile chemicals have been found to reduce populations more than soil fumigants.