Host: flue-cured tobacco (Nicotiana tabacum (flue-cured type)
Description: Potassium (K) deficiency causes slight mottling and brownish-yellow spots on leaf tips. Later there are brownish-yellow spots on leaf tips. Later there are brownish-yellow spots along leaf margins that become necrotic and fall out, leaving a ragged appeareance. Leaves may be puckered, with the tips and margins curled downward. Symptoms first appear on lower leaves in young plants and upper leaves on older plants. Symptoms are more acute on rapidly growing plants and may be accentuated by excess N. Excess K does not causes visible symptoms.
Image type: Field
Image location: United States
Name: R.J. Reynolds Tobacco Company Slide Set
Organization: R.J. Reynolds Tobacco Company
Country: United States