Abstract
Abstract Various silver containing solutions were evaluated for their effectiveness in extending the life of cut carnations (Dianthus caryophyllus, L. ‘Improved White Sim’) by simple chemical tests of the solutions. Effective solutions formed an immediate white or yellow precipitate (AgI) when 3.0 ml of the solution reacted with 0.15 ml of 2.0 m KI solution, whereas no precipitate formed when reacted with 0.15 ml of 2.0 m NaCI solution. When no precipitate formed with KI, there was insufficient silver in the solution to extend flower life, and hence, no silver was detected in a combined stem and leaf sample or in the flower head (consisting of receptacle, pistil, bracts, calyx and petals). A precipitate forming with both KI and NaCI indicated that the solution contained silver but in the wrong formulation to extend life. Flowers treated with this solution had silver in the combined stems and leaves, but practically none in heads. When solutions were effective, more silver was detected in heads than in the stems and leaves combined.
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