Host: flue-cured tobacco (Nicotiana tabacum (flue-cured type)
Description: Boron (B) deficiency is rare but is more likely to occur at soil pH above 6.2, especially on sandy soils following periods of high rainfall and/or rapid growth. Initially, the bud leaves become light green and distorted. In advanced stages, the terminal bud dies and the remaining leaves become abnormally thickened and tend to curl downward. Lower leaves become turgid and brittle as indicated by breaking of the midrib, which may cause leaf drop. The tissue of the broken midrib may be darkened.
Image type: Field
Image location: United States
Name: R.J. Reynolds Tobacco Company Slide Set
Organization: R.J. Reynolds Tobacco Company
Country: United States