lesion nematode Slide066

Lesion nematode

Description: A small transparent parasite that is visible only under a microscope.

Timing of damage: Mid-season but active throughout growing season

Type of damage: Plant stunting and yellowing and short, stubby roots.

Scouting: Lesion nematodes feed inside the roots, so root samples are necessary. Take samples at midseason and place in a plastic bag to send to a nematology lab. Be careful not to expose samples to high temperatures.

Economic threshold: When nematodes exceed 250 per 100 cubic cm of soil and 1 gram root tissue.

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