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The EAB Invasion Wave Concept

The wave of EAB invasion builds in intensity after it begins damaging trees. At the cusp of the invasion wave damage is difficult to notice. Indeed most urban forests cities are lucky to find EAB when 4 or 8% of the trees are infected. This leaves 4-5 years until all ash trees are damaged beyond the point where they can be protected. During the Cusp and Crest Phase of the invasion management needs to be very aggressive because EAB populations are high.

After EAB has killed all the ash trees the population of EAB will get very low, since the only living ash trees in the area are likely to have been treated with insecticide. During this Post Crest phase, management should rely less on aggressive treatment of all the ash trees with the insecticides and more on inspection and treatment of trees with active EAB infestations.

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