Intraspecific variation in Fraxinus pennsylvanica responses to emerald ash borer (Agrilus planipennis)

摘要: The emerald ash borer (EAB; Agrilus planipennis Fairmaire) is a bark and wood boring beetle native to east Asia that was first discovered in North America 2002. Since then, entire stands of highly susceptible green (Fraxinus pennsylvanica Mar- shall) have been killed within few years infestation. We identified small number mature trees which attacked by EAB, yet survived the peak EAB infestation resulted mortality rest cohort. Adult landing feeding preference bioassays, leaf volatile quantification egg bioassay experiments were used characterize potential differences responses these select ''lingering'' relative known controls. Three selections as being significantly less preferred for adult feeding, but no specific profile associated with this reduced preference. Egg bioassays two had significant larval survival development; one having higher larvae apparent host tree defenses other lower weight. Correlation validation results replicated plantings assess resistance field still necessary. However, between lingering controls measured indicate more than mechanism responsible increased surviving longer their counterparts. Efforts further increase through use breeding program are underway.