Copper is required for many enzymatic activities in plants and for chlorophyll and seed product. Deficiency of copper can lead to increased susceptibility to diseases like ergot, which can cause significant yield loss in small grains. Most Minnesota soils supply adequate amounts of copper for crop production.
Copper Deficiency Symptoms of copper are dieback of steams and twigs, yellowing of leaves, stunted growth and pale green leaves that wither easily. Copper deficiencies are mainly reported on sandy soils which are low in organic matter. Copper uptake decreases as soil pH increases.
Foliar: 2 to 2.5 ml/ltr of water or spray solution.
Fertigation: 1 ltr/acre.