Scientific Opinion on a technical file submitted by the US Authorities to support a request to list a new option among the EU import requirements for wood of Agrilus planipennis host plants

摘要

This document presents the scientific opinion of the Panel on Plant Health on the technical file submitted by the\udUS Authorities to support a request to list a new option among the EU import requirements for wood of Agrilus\udplanipennis host plants. The option under consideration is a heat treatment at 60 °C for 60 min to eliminate\udpossible infestations of the wood by the emerald ash borer (EAB). The experiments leading the US Authorities\udto propose this option are presented in a scientific peer reviewed publication, Myers et al. (2009). The analysis\udof the aggregated data published by Myers et al. (2009) and based on a Probit regression model showed that the\udproposed treatment cannot guarantee a control level of 99 % or higher. The analysis of the individual data either\udfrom the original measurements or from a corrected dataset, using a Probit regression model, showed that it is\udlikely to observe one live EAB out of an infestation of 100 after the proposed heat treatment of 60 °C/60 min. To\udensure a control level of 99 % the temperature of the heat treatment of 60 min should be higher than 70 °C.\udResults obtained with a Poisson log linear model based on individual data showed that the estimated probability\udthat one insect or more per m2\udsurvive the proposed heat treatment was higher than 0.6 and that there is a 0.1\udprobability that three insects or more per m2\udsurvive the proposed heat treatment. Based on these results, the\udPanel concludes that A. planipennis is likely to survive the proposed heat treatment of 60 °C/60 min with a low\uduncertainty, and that the alternative option proposed in the technical file submitted by the US Authorities for\udwood does not guarantee the wood to be free of A. planipennis.