Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
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,…
Details
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…
Details
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…
Details
Boron deficiency is a nutrient disorder caused by inadequate boron reaching actively growing tissues. It can stunt roots and shoots, kill terminal buds, deform…
Details
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,…
Details
Manganese deficiency is a nutrient disorder that commonly affects young leaves, causing yellowing between the veins while the veins remain green. It is most…
Details
Iron deficiency, often called iron chlorosis, is an environmental nutrient disorder in which young leaves turn yellow between the veins while the veins remain…
Details
Sulfur deficiency is a nutrient disorder that reduces chlorophyll and protein formation, producing pale green to yellow new growth, weak stems and slow development.…
Details
Magnesium deficiency is a nutritional disorder rather than an infectious disease. Because magnesium moves within plants, symptoms commonly begin on older, lower leaves as…
Details
Calcium deficiency is a physiological disorder caused by inadequate calcium supply to actively growing tissues or by interrupted calcium transport within the plant. Symptoms…
Details
Potassium deficiency is a nutritional disorder caused by inadequate plant-available potassium or restricted uptake. It commonly begins on older leaves as pale or yellow…
Details
Phosphorus deficiency is a nutritional and soil-availability disorder that slows root and shoot growth, delays maturity, and may produce dark-green foliage with reddish-purple coloration,…
Details