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Deficiency/Toxicity Symptoms

Deficiency/Toxicity Symptoms . Terminology. Burning: Severe localized yellowing, scotched appearance Chlorosis : General yellowing of the plant tissue Immobible : Not able to be moved from one part of the plant to the other. Terminology.

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Deficiency/Toxicity Symptoms

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  1. Deficiency/Toxicity Symptoms

  2. Terminology • Burning: Severe localized yellowing, scotched appearance • Chlorosis: General yellowing of the plant tissue • Immobible: Not able to be moved from one part of the plant to the other

  3. Terminology • IntervienalChlorosis: Yellowing in between leaf veins, yet veins remain green • Localized: Symptoms limited to one leaf or one section of the leaf or plant • Mobile: Able to be moved from one part of the plant to another

  4. Terminology • Mottling: Spotted, irregular, inconsistent pattern • Necrosis: Death of plant tissue; tissue browns and dies • Stunting: Decrease growth, shorter height of the affected plants

  5. Visual Cues • Many symptoms appear similar (N and S) • Multiple deficiencies and/or toxicities can occur at the same time • Crop species, and even some cultivars of the same species, differ in their ability to adapt to nutrient deficiencies and toxicities.

  6. Visual Cues 4. Pseduo deficiency symptoms (disease, drought, soil compaction, etc) 5. Signs may not be present in all situations 6. Field symptoms appear different than ‘ideal’ symptoms.

  7. Nutrient Deficiency • When essential elements are present in the plant in amounts smaller than minimum levels required for plant growth, the plant exhibits various external and internal symptoms. • 1. These symptoms may appear on any or all organs of the plant • including leaves, stems, roots, flowers fruit and seeds. • A knowledge of these symptoms will help the student determine their cause and aid in finding the cure

  8. Nitrogen Deficiency • 1. slow growth, stunted plants, • 2. plants are light green to yellow in color (chlorotic), and • 3. "firing" of tips and center position of leaves beginning with the older leaves.

  9. Phosphorus Deficiency 1. slow and stunted growth, • purplish coloration on foliage of some plants (this may be associated or confused with cool or cold temperatures), 3. dark green coloration with tips of leaves dying, 4. delayed maturity, and 5. poor grain, fruit or seed development.

  10. Potassium Deficiency • tip and marginal leaf chlorosis and then death starting on more mature (most recently eveloped fully mature) leaves, • weak stalks, plants "lodge" easily, • small fruit or shriveled seeds, and • 4. plants have thin shoots and in severe cases show dieback.

  11. Read All About It Micronutrient • Cl • Fe • B • Mn • Zn • Co • Mo • Ni Flyer: • Make a 1 page flyer. • Include in the flyer: • A picture of the plant • Symptoms– How to identify • Deficiency • Toxicity • Methods to correct the • List Sources

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