Glycobius

Associated with forests containing sugar maple (Acer saccharum); larvae develop within living or recently dead maple trees, particularly in the phloem-xylem interface of the lower bole (<20 cm diameter). Adults have been observed in mesic lowland deciduous forest and dry-mesic upland deciduous forest habitats.

Eastern North America; recorded from New York, Vermont, and Missouri. Distribution records indicate presence in the northeastern United States and Ozark region of Missouri.

Adults emerge between 316 and 648 accumulated degree-days (base 10°C), typically in spring and early summer. Males emerge prior to or simultaneously with females.

Larvae feed on the phloem and xylem tissues of sugar maple (Acer saccharum). Adult diet is not documented.

• Acer saccharum - larval hostPrimary and obligate host; larvae feed on living or recently dead trees, preferring southern and eastern aspects and lower bole positions (<20 cm diameter)

Complete metamorphosis. Larval eclosion occurs 7–10 days after oviposition. Larval development progresses through distinct size classes characterized by head capsule measurements and gallery lengths. Nearly 20% of individuals survive to adulthood under natural conditions. Mortality is concentrated in late larval development (43%), with predation by hairy woodpeckers (Dryobates villosus) accounting for 43% of total mortality and 74% of late instar mortality. One parasitoid species, Dolichomitus irritator (Ichneumonidae), has been documented. Female fecundity averages 41.3 ± 6 eggs. Non-functional ovipositors observed in 16% of females represent appreciable reproductive loss.

Adults are attracted to ethanol/red wine-baited traps, though less commonly than some sympatric cerambycids. Oviposition occurs preferentially on southern and eastern aspects of host trees. In 77% of infested trees, only one oviposition site is established; in 70% of these sites, only 1–2 larvae successfully eclose and penetrate bark to begin feeding. Males possess longer and wider antennae than females, pronotal pits containing gland pores, and a straight to concave posterior margin of the terminal sternite.

Primary consumer and wood-borer in sugar maple ecosystems. Larval galleries impact tree growth, with attacked trees showing significantly reduced cross-sectional area growth (1.9% vs. 3.7% in control trees) in the year preceding attack. Serves as prey for woodpeckers and hosts for parasitoid wasps.

Economic pest of sugar maple in forest and sugarbush operations. Infestations reduce tree growth rates and can impact maple syrup production. Damage is often cryptic, leading to conservative estimates of impact. Management implications exist for sugar maple silviculture and syrup production.

• Plinthocoelium suaveolensBoth are cerambycids in tribe Clytini attracted to ethanol-based traps in similar forest habitats; distinguished by host association (Plinthocoelium on Sideroxylon lanuginosum vs. Glycobius on Acer saccharum) and adult morphology
• Eburia quadrigeminataSympatric cerambycid frequently captured in same trap types; distinguished by different host associations and adult morphology

• Cerambycidae
• Cerambycinae
• Clytini
• monotypic genus
• sugar maple borer
• wood-borer
• forest pest
• eastern North America
• Acer saccharum specialist

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
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• Life history and bionomics ofGlycobius speciosus(Coleoptera: Cerambycidae: Cerambycinae: Clytini)
• Characteristics of trees damaged by sugar maple borer, Glycobiusspeciosus (Say)