THE FUMIGATION OF LOGS FOR EXPORT REMAINS ONE OF THE LARGEST QUARANTINE AND PRE-SHIPMENT USE EXEMPTIONS FOR METHYL BROMIDE (MB) IN THE UNITED STATES. LOG FUMIGATION SCHEDULES USE HIGH DOSES OF MB TO KILL PINEWOOD NEMATODES, BURSAPHELENCHUS XYLOPHILUS, AND THE OAK WILT FUNGUS, BRETZIELLA FAGACEARUM, WHICH ARE THE TWO MOST IMPORTANT PESTS ASSOCIATED WITH US LOG EXPORTS. THE PHASE-OUT OF MB HAS MADE THE FUMIGANT MORE EXPENSIVE AND MAKES ITS FUTURE AVAILABILITY UNCERTAIN. IN ADDITION, LOCAL AIR QUALITY REGULATIONS RESTRICT MB USE AND HAVE REDUCED THE VOLUME OF LOG EXPORTS FROM THE US. COMMERCIALLY VIABLE ALTERNATIVES TO MB ARE DESPERATELY NEEDED FOR US LOG EXPORTS TO PROTECT A MARKET WORTH OVER $2.3 BILLION ANNUALLY.RECENT STUDY OF TWO POTENTIAL ALTERNATIVE FUMIGANT PRODUCTS, SULFURYL FLUORIDE (SF) AND PHOSPHINE (PH3), HAS SHOWN THAT NEITHER IS ABLE TO PROVIDE COMPLETE CONTROL OF PINEWOOD NEMATODE OR OAK WILT. AS A RESULT OF THESE FINDINGS, PRELIMINARY TESTING WAS CONDUCTED WITH ETHANEDINITRILE (EDN), WITH PROMISING RESULTS THUS FAR.1) PROJECT TYPE: THIS INTEGRATED PROJECT WILL COMBINE RESEARCH ON EDN AS A LOG FUMIGANT, ENGAGEMENT WITH COMMERCIAL FUMIGATORS TO PERFORM EXPERIMENTAL TRIALS, AND ECONOMIC ANALYSES THAT FACILITATE THE USE OF EDN IN PLACE OF MB FOR LOG EXPORTS.2) STATEMENT OF THE LONG-TERM GOAL: THE LONG-TERM GOAL IS TO END OR SIGNIFICANTLY REDUCE THE USE OF MB FOR LOG EXPORTS.THE USE OF MB CONTINUES FOR LOG EXPORTS, AND TO A LESSER DEGREE FOR DOMESTIC MOVEMENT OF WOOD PRODUCTS UNDER THE QUARANTINE AND PRE-SHIPMENT USE EXEMPTION. THE ADOPTION OF AN EFFECTIVE AND PRACTICAL FUMIGANT ALTERNATIVE TO MB WOULD FACILITATE COMPLIANCE WITH STATE AND FEDERAL AIR QUALITY REGULATIONS, AND WOULD BENEFIT THE INDUSTRIES AND REGULATORY AGENCIES INVOLVED IN THE INTERNATIONAL TRADE OF LOGS.THE OBJECTIVES OF THE PROPOSED PROGRAM ARE TO:DEVELOP EFFICACY DATA FOR EDN AS AN ALTERNATIVE TO MB AGAINST PINEWOOD NEMATODE AND OAK WILT, THE TWO MOST IMPORTANT TRADE BARRIERS FOR LOG EXPORTS.COLLABORATE WITH INDUSTRY STAKEHOLDERS AND REGULATORY AGENCIES TO DEVELOP QUARANTINE-LEVEL FUMIGATION TREATMENT SCHEDULES BASED ON THE EFFICACY DATA AND VALIDATE THEM ON COMMERCIAL SIZE LOADS OF LOGS.PROVIDE DATA PACKAGES TO SUPPORT EDN FOR PRE-SHIPMENT USE BY US TRADING PARTNERS FOR LOG EXPORTS.ANALYZE THE FINANCIAL IMPACT OF THE SUBSTITUTION OF EDN AS A FUMIGANT ALTERNATIVE TO MB FOR LOG EXPORTERS.PARTNER WITH COMMERCIAL FUMIGATORS AND LOG EXPORTERS ABOUT THEIR TREATMENT OPTIONS, AND ASSOCIATED PROTOCOLS AND COSTS.