Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
Root damage can make a plant look nutrient-starved even when the soil contains adequate nutrients. Injured, rotted, compacted, drought-stressed, or poorly distributed roots cannot…
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Cold-soil phosphorus deficiency is a temporary nutrient-uptake disorder that affects young plants when cool, wet soil slows root growth and limits phosphorus absorption. Seedlings…
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High-pH-induced iron deficiency, commonly called lime-induced iron chlorosis, is a nutrient-availability disorder rather than an infectious disease. Plants may contain ample total iron in…
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Multiple nutrient deficiency is a complex plant nutrition disorder in which two or more essential elements are unavailable or insufficient at the same time.…
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Nickel deficiency is a rare plant nutritional disorder involving impaired urease activity and nitrogen metabolism. The clearest signs are necrotic leaf tips, yellowing, stunted…
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Chlorine deficiency is an uncommon nutritional disorder caused by inadequate chloride, the plant-available form of chlorine. Affected plants may show reduced growth, wilting, chlorosis,…
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Molybdenum deficiency is an uncommon nutritional disorder caused by inadequate plant-available molybdenum, most often in strongly acidic soil. Symptoms vary by crop but may…
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Copper deficiency is an uncommon but potentially serious micronutrient disorder caused by inadequate plant-available copper. It is most likely in high-organic-matter or sandy soils…
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Boron deficiency is a nutrient disorder caused by inadequate boron reaching actively growing tissues. It can stunt roots and shoots, kill terminal buds, deform…
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Zinc deficiency is a physiological nutrient disorder caused by insufficient plant-available zinc or poor root uptake. It is especially important in fruit trees, vines,…
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Manganese deficiency is a nutrient disorder that commonly affects young leaves, causing yellowing between the veins while the veins remain green. It is most…
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Iron deficiency, often called iron chlorosis, is an environmental nutrient disorder in which young leaves turn yellow between the veins while the veins remain…
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