Image Number: 1402035

Root lesion nematode damage (also called brown root rot) usually occurs in well-defined areas in the field. Infected plants are stunted, yellowed, tend to wilt during the heat of the day, and "fire" along leaf margins. Root lesion nematodes enter the white feeder roots causing small, reddish-brown lesions. Severe infections cause extensive root pruning and root rot resulting in a tap root lacking lateral roots. Secondary root growth is abundant near the soil surface away from severe nematode activity. On some rotted roots, the tissue easily sloughs off in a sleeve-like fashion, leaving the stringy vascular cylinder.
Image type:

You must attribute the work in the manner specified (but not in any way that suggests endorsement).

Image location:
United States


Kingdom: Animalia
Phylum: Nematoda
Class: Chromodorea
Order: Tylenchida
Family: Pratylenchidae
Genus: Pratylenchus
Subject: Pratylenchus spp.


Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Solanales
Family: Solanaceae
Genus: Nicotiana
Subject: Nicotiana tabacum (flue-cured type) L.
Node Affiliation:
Image uploaded:
Sunday, March 10, 2002
Image last updated:
Tuesday, June 14, 2011