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Summary
Emerald Ash Borer Adults Begin to Take Flight in 2008 (5/30/2008)
Dr. Dave Shetlar with Ohio State University (OSU) reported that during a visit on Friday, May 23rd to Mingo City Park in Delaware (just north of Columbus), that he found emerald ash borer (EAB) adults chewing their way into the outside (of the tree) world. EAB adults were flying when Joe Boggs with OSU Extension stopped by the Warren County infestation on Sunday, May 25th. Adult emergence typically occurs between May and August. As adults emerge, they leave 1/8" small, distinctly D-shaped exit holes in the trunk and main branches, which is a sure sign of infestation. Adults feed on foliage for one to two weeks prior to mating. Females produce about 50 to 100 eggs, which are laid individually on the bark surface or within bark cracks and crevices of ash trees. Observations indicate that higher branches and upper portions of the trunk are colonized initially, making it difficult to detect early infestations. As larvae hatch, they tunnel into the tree, where they feed through the summer and early fall on the phloem and outer sapwood, excavating S-shaped, serpentine galleries just under the bark. Most complete their development prior to over-wintering in the outer bark or just under the inner bark within the outer inch of sapwood. Pupation occurs in mid- to late-spring the following year. Adults emerge soon thereafter to complete the typical one-year cycle.
Dr. Dave Shetlar with Ohio State University (OSU) reported that during a visit on Friday, May 23rd to Mingo City Park in Delaware (just north of Columbus), that he found emerald ash borer (EAB) adults chewing their way into the outside (of the tree) world. EAB adults were flying when Joe Boggs with OSU Extension stopped by the Warren County infestation on Sunday, May 25th. Adult emergence typically occurs between May and August. As adults emerge, they leave 1/8" small, distinctly D-shaped exit holes in the trunk and main branches, which is a sure sign of infestation. Adults feed on foliage for one to two weeks prior to mating. Females produce about 50 to 100 eggs, which are laid individually on the bark surface or within bark cracks and crevices of ash trees. Observations indicate that higher branches and upper portions of the trunk are colonized initially, making it difficult to detect early infestations. As larvae hatch, they tunnel into the tree, where they feed through the summer and early fall on the phloem and outer sapwood, excavating S-shaped, serpentine galleries just under the bark. Most complete their development prior to over-wintering in the outer bark or just under the inner bark within the outer inch of sapwood. Pupation occurs in mid- to late-spring the following year. Adults emerge soon thereafter to complete the typical one-year cycle.
