Northwest berry Foundation

Management Detail

Root-leision Nematodes

in Strawberries

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Latin name: Pratylenchus penetrans and P. crenatus

Description:

Root-lesion Nematodes are microscopic worm like animals that feed on the roots. Infected plants are dwarfed, off-color, and grow poorly. Damage is frequently seen as spots in the field. Roots have brown lesions.

Links:

Scouting:

  • Watch for weak growth areas. Often spotty throughout field.
  • Take representative soil sample. Populations are relatively low through winter and spring but increase rapidly through summer.
  • Before planting strawberries, it is best to sample in late summer.
  • The number of nematodes in the soil can be a rough guide to possible plant damage.
  • Factors such as crop age, planting frequency, presence of other diseases and pests, and adverse growing conditions influence the effect on plant growth.
  • In some cases, 300-nematodes/100 g of soil affect plant growth, but much higher populations often have little effect.

 
Cultural Controls:

None listed at present.

 

For information about chemical controls, check with our Pesticide Guide.

images


photo from Oregon State University


Root lesion nematode head - photo from Oregon State University


Root lesion nematode damage in strawberries - photo from Oregon State University


Root lesion nematode damage in strawberries - photo from Oregon State University

 

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