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Site Specific Nutrient Disorders |
Iron deficiency
Areas affected
Iron deficiency is widespread in alkaline soils of Tamil Nadu and Maharashtra
where cassava is grown.
Deficiency symptoms
Iron deficiency is characterized by chlorosis of younger leaves. First, the
symptoms will appear in interveinal areas of leaves and later on all portions of
leaves including veins will become chlorotic. In the case of iron deficiency,
the green veins will become prominent in between the yellowish interveinal
areas, while in the case of manganese deficiency, the boundary between green
veins and chlorotic interveinal areas becomes diffuse. Iron deficient plants
become stunted in growth, leaves will be smaller in size than normal leaves but
will not be deformed.
Iron deficiency symptoms on cassava leaf |
Iron deficient plant in Vertisols of Tamil Nadu |
Iron deficient plant in Vertisols of Maharashtra
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Corrective measures
Apply 1-2% FeSO4.7H2O solution as foliar spray. Dip stakes of cassava in 5%
FeSO47H2O solution for 15 minutes before planting. |
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