HDC launches daffodil hot water treatment factsheet

A series of projects funded by the Horticultural Development Company (HDC) on the efficacy of and additives used in Hot-water Treatment (HWT) for bulbs has led to a new factsheet to help growers to safeguard the health of bulb stocks.

Hot-water treatment (HWT) has been used for many years to manage stem nematode and basal rot in daffodil bulbs, but the process also helps to control a number of other pest and disease issues. Bulbs are usually immersed in water containing disinfectant and fungicide and maintained at 44.4°C for three hours to achieve the desired results.

The HDC has funded a series of inter-related research projects over several years in an attempt to find alternatives to formalin (the disinfectant previously used), thiabendazole-based fungicides and to fine-tune the actual process of the HWT itself.

Knowledge transfer manager Wayne Brough said: "This new HDC factsheet reviews the HWT process, summarises the results of the HDC funded research projects and provides practical measures as to how bulb growers can use HWT to continue safeguarding the health of bulb stocks."

Factsheet 10/13: Hot-water treatment of daffodil bulbs, compiled by Gordon Hanks, will be distributed to levy payers within the Bulb and Outdoor Flowers sector or can be obtained for a small fee by contacting louise.arculus@hdc.ahdb.org.uk or call 02476 6478661.


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