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magnesium deficiency
Host: flue-cured tobacco (Nicotiana tabacum (flue-cured type)
L.)
Descriptor: Damage
Description: Magnesium (Mg) deficiency, sometimes called "sand drown," occurs primarily on sandy soils during seasons of excessive rainfall. The first symptom of deficiency is loss of green color from lower leaves. On individual leaves it begins at the tips and margins and proceeds toward the base and center. Interveinal tissues become chlorotic while veinal areas remain green (photo). In extreme cases, lower leaves turn almost white and chlorotic symptoms progress to higher leaves. Mg deficient leaves rarely develop necrotic spots. It may occur at any stage of growth but occurs most often following rapid growth during the leaf production phase (4-8 weeks after transplanting). High rates of K and/or Ca on low Mg soils may enhance Mg deficiency.
Image type: Field
Image location: United States
Photographer Information
Name: R.J. Reynolds Tobacco Company Slide Set
Organization: R.J. Reynolds Tobacco Company
Country: United States
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Image Number: 1402097
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Image Use:(?)
You must attribute the work in the manner specified (but not in any way that suggests endorsement).
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Image Citation:(?) R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org
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Node Affiliation:
University of Georgia
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Available Images Resolutions:
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