| Abstract: | Abstract Coffea arabica L. seedlings (cv. S.L.34) were sprayed with varying concentrations of cuprous oxide at 0.0, 0.25, 0.50 and 0.75% for 30 days. Significant increases in the total mean fresh and dry weight; rate of transpiration; stomatal apertures; the total leaf area and plant vigor were observed on the seedlings with increasing concentrations of Cu treatments. The content of N, K, Ca and Cu were significantly increased in the seedlings at Cu spray treatments of 0.50 and 0.75% It is possible that the growth promoting effects produced in coffee by spraying high concentrations of copper is partly nutritional. This is brought about by the catalysing effects of the absorbed Cu ions, by accelerating enzymatic activities within the plant and hence increasing nutrient uptake. |
