"Factors Affecting the Survival of Ash..." now available online
An
article by Kathleen Knight, John P. Brown and Robert P. Long, entitled "Factors
affecting the survival of ash (Fraxinus spp.) trees infested by emerald
ash borer (Agrilus planipennis)" is now available online:
The article is on the survival analysis of ash trees in Ohio. According to Kathleen Knight, the main take-home message was that ash trees actually died slightly faster in stands with lower densities of ash, the opposite of what the authors thought would happen. This is just the speed of mortality, not the % mortality (almost all the ash trees die eventually no matter what).
This is a more science-oriented academic-type paper, although it does have some management implications, the big one being that reducing the density of ash in a stand will NOT protect the remaining ash from EAB and may in fact speed up their demise (of course, there may still be silvicultural reasons to reduce ash density and diversify the stand). Knight says they are currently working on some less technical, more management-oriented papers that will be submitted sometime late summer or fall.
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