Host: flue-cured tobacco (Nicotiana tabacum (flue-cured type)
Description: 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: Field
Image location: United States
Name: R.J. Reynolds Tobacco Company Slide Set
Organization: R.J. Reynolds Tobacco Company
Country: United States