Review and development of the CIPC application process and its impact on potatoes stored for processing


Previous AHDB Potatoes funded research showed that all common UK fogging equipment generates ethylene. It is a combustion by-product (rather than any component of the CIPC formulation) and levels are sufficient to have a deleterious effect on processing quality. This information lead to the development of an altered store management regime to reduce the time of exposure of crops to ethylene after CIPC application.

Further work has now been carried out to investigate additional options for reducing the impact of fogging on processing quality. This has included the use of alternative fuel sources, such as methanol and LPG, and the modification of existing fogging equipment to include a catalytic conversion system. In experimental scale treatments, a fogger fitted with a CAT system resulted in lower ethylene levels and improved processing quality compared to  a standard fogger. 

The potential for using an ethylene blocker, which limits plant responses to ethylene, to reduce the deleterious effects on fry colour was also tested. The results suggested that regular re-treatment may be required, making the approach unlikely to be cost effective.

Options for CIPC application using controlled release technology were also evaluated. This involves the use of CIPC vapour as a sprout suppressant. Work carried out during the first two years of the project indicated that CIPC vapour can inhibit sprout growth under the right conditions. Subsequent work investigated different materials, to identify those that had good CIPC loading and release properties and might be used to provide a source of CIPC vapour in stores. The results from the work have been developed further in project R288.

The final report on work carried out during the project is provided below. There is also a report on two trials using a thermal fogger fitted with a CAT-kit modification.

Project code:
01 November 2002 - 31 January 2006
AHDB Potatoes
Project leader:
Harry Duncan


20062 CIPC Review Final report R235_0

About this project

To provide data indicating the means by which CIPC can be applied with minimal effect on processing quality.