Manganese Deficiency
Manganese Deficiency  Iron and manganese deficiencies can occur on trees and shrubs, as well as on many herbaceous plants. Iron and manganese are constituents of chlorophyll, the green pigment required by the plant for the utilization of the sun's energy. Iron functions as a co-enzyme in certain enzyme systems, and is involved in the synthesis of chloroplast proteins (the plastid within the plant cell which contain the chlorophyll). Manganese is essential for the synthesis of chlorophyll. As the functions of both microelements are closely related, symptoms of their deficiencies are similar. Nevertheless, plants vary in their susceptibility to deficiencies of these micronutrients. See Iron deficiency for further information. as these two deficiencies are generally interrelated. Susceptible Plants – French bean, pea, onion, apple, cherry, raspberry, American elm, High bush cranberry, Horse chestnut, Rhododendron, Azalea, Hydrangea, Rose, Jack pine, Spirea. Cottonwood, Walnut, Currant, Magnolia, White pine, Elder, Maples, Yellow birch, Flowering dogwood, Mountain ash, Forsythia, Oaks
Symptoms- The first symptom of an iron or manganese deficiency on broadleaved plants is a general yellowing or bleaching of the foliage, termed chlorosis. The degree of yellowing is an indication of the severity of the deficiency. Severely affected foliage may develop marginal scorching. All veins, including the smallest ones, remain green. In conifers, the needles turn yellow. If the deficiency is severe, the yellowed needles turn brown and die. Iron chlorosis develops on younger foliage first, as this micronutrient is relatively immobile in the plant. (This is in contrast to nitrogen deficiency.
Nitrogen is a mobile macro element, the deficiencies of which show up first in older foliage.) A manganese deficiency may show up in older or younger foliage, depending on the host, and also result in wavy, crinkled, or curled leaf margins. Causes– Manganese deficiency is most common in soils with a pH greater than 7.5 and also those with poor drainage and high organic matter level such as peat soil. Prevention and Control- Grow plants suitable to soil type. Improve soil structure. by applying compost or well rotted manure Manganese deficiency can be corrected with Foliar Fertilizer and organic fertilizers such Oneness One-Part Base Nutrients 5-9-4 Earth Juice Microblast Liquid Micronutrient
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