Dioryctria pseudotsugella

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

SeasonalityAdult fly late July - early August IdentificationWingspan: 10.0-11.0 mm. Lacking raised scales. Forewing primarily brown with contrasting white dentate bands and discocellular spot. Morphologically similar to Dioryctria reniculelloides. Minor variations in transverse band dentation and coloration have been used to separate the species (Mutuura and Munroe 1973; Neunzig 2004), though intermediate specimens are present in regions of overlap. Larval host records are also used for identification though host overlap also occurs. Accurate separation of D.pseudotsugella and D. reniculelloides specimens is difficult (Sopow et al. 1996).

Scientific Name Dioryctria pseudotsugella Habitat Common, found in various coniferous forest types throughout range. Seasonality Adult fly late July - early August Identification

Wingspan: 10.0-11.0 mm. Lacking raised scales. Forewing primarily brown with contrasting white dentate bands and discocellular spot. Morphologically similar to Dioryctria reniculelloides. Minor variations in transverse band dentation and coloration have been used to separate the species (Mutuura and Munroe 1973; Neunzig 2004), though intermediate specimens are present in regions of overlap. Larval host records are also used for identification though host overlap also occurs. Accurate separation of D.pseudotsugella and D. reniculelloides specimens is difficult (Sopow et al. 1996).

Life History Larvae feed on cones and cambium of hosts. Feeding also observed on needles of host plants (Prentice 1965) Conservation Common. Not of concern. Diet Info Primary host is Douglas fir (Pseudotsuga menziesii), though larvae also found on spruce, fir and hemlock species (Picea, Abies and Tsuga spp) (Mutuura and Munroe 1973). Range Southern British Columbia and Alberta, and south to New Mexico.

Page Citation

"Species Details - Dioryctria pseudotsugella, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-4934. Accessed 26 Jul. 2025.

References

2 results plotted on map in 2 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

BIRD222 - Dioryctria pseudotsugella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Big Knife Provincial Park Collected ByBird, C. D. Date Collected2002-09-26

BIRD1518 - Dioryctria pseudotsugella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Big Knife Provincial Park Collected ByBird, C. D. Date Collected2003-07-30

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Species Details