Implications of synthetic chemicals and natural plant extracts in improving vase life of flowers

Post harvest handling of flower crops is a vast sector witnessing the unprecedented load of chemicals being applied on flower commodities to retain their freshness and display quality. Concerns about unregulated use of synthetic chemicals are often not raised as the commodities in question are not consumed as eatables. Several studies from leading flower markets of Europe, Africa and other countries have highlighted the ill-effects of excessive chemical use on environment and health of flower workers. Nowadays, there is a growing concern to reduce the use of harmful chemicals in food crops and to divert towards organic production, and same also applies to the ornamental plant sector. Use of harmful chemicals such as Silverthiosulphate (STS), Silver nitrate (AgNO3), Aluminium and Cobalt compounds, Hydroxy quinoline, and Thiabendazole (TBZ) during post harvest handling of flower crops should be minimised to avoid associated health consequences. Safe and effective natural alternatives need to be explored for use in vases to replace these chemicals. This review summarizes role of different chemicals in extending longevity of cut flowers and also associated risks. Various studies on cut flower handling with use of herbal extracts reveal their potential to reduce the use of chemicals.