Host: flue-cured tobacco (Nicotiana tabacum (flue-cured type)
Description: Frenching is caused by a toxin produced by a nonpathogenic soil bacterium (Bacillus cereus). Yellowing begins along the edge of young leaves and may eventually include all the area between the veins which remain green. Plants are stunted and develop a large number of long, narrow leaves and suckers. Frenching normally occurs in small areas of the field, especially in poorly drained, high pH soils during cool, wet weather.
Image type: Field
Image location: United States
Specimen in collection: No
Name: R.J. Reynolds Tobacco Company Slide Set
Organization: R.J. Reynolds Tobacco Company
Country: United States