Ethanedinitrile (EDN): A potential replacement for the fumigant Methyl Bromide for eradication of pests in Pinus radiata export logs

Project Number

3158

Project Type & Status

Core-Complete

Project Leader

Pine logs

Impact Delivery Themes

Ethanedinitrile (EDN): A potential replacement for the fumigant Methyl Bromide for eradication of pests in Pinus radiata export logs

Final Report Summary

A number of chemicals are being withdrawn which have implications for plant biosecurity. One of the foremost is methyl bromide. This study determined the feasibility of using Ethanedinitrile (EDN) as an alternative phytosanitary treatment to methyl bromide, with particular emphasis on reducing the risks associated with trade of dry timber. The study quantified costs associated with EDN using New Zealand forest insects as a case study, and analysed product efficacy, phytosanitary treatment parameters, fumigation chemistry, operations, occupational health and safety, environmental, and economic issues.

The project developed has provided information for the Australian forestry sector and broader applicability to NZ and Australian quarantine authorities exploring whether EDN may be a viable alternative to methyl bromide.

There appears to be no significant technical or potentially negative environmental issues that will prevent the use of EDN as an alternative phytosanitary treatment for export logs. This advice was supported by the following conclusions:

  1. Although EDN is a proven effective fumigant for the control of insects, weed seeds and fungi when used at the recommended rates for fumigation, EDN has little or no effects on animals external to the fumigation environment.

  2. The preliminary data of Hall et al. (2014)1 demonstrated that the release of EDN after fumigation is negligible.

  3. Best industrial practices used for EDN fumigations of logs, coupled with controls the EPA would require, will minimise any adverse effects to the environment.

This study was done to inform the Board of Stakeholders in Methyl Bromide Reduction Inc (STIMBR) for decision-making around further investment into EDN research as a potential phytosanitary treatment for New Zealand export Pinus radiata logs.

Download the full Final Report

1. Hall M, Pranamornkith T, Hall A & Brash D, (2014) Simulated commercial fumigation of sawn timber and logs to verify the sorption and desorption model of ethanedinitrile. Plant and Food Research SPTS No. 10152.

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