hemlock looper
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FACETS ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 493-506
Author(s):  
Kristen J. Milbury ◽  
Les C. Cwynar ◽  
Sara Edwards

The use of fossil moth wing scales has recently been introduced as a new method to reconstruct population histories of lepidopterans and provide a proxy for insect disturbance. We investigated the potential for using wing-scale ultrastructure to distinguish between the five most common outbreak species of moth pests in eastern North America: spruce budworm ( Choristoneura fumiferana Clemens), hemlock looper ( Lambdina fiscellaria Guenée), forest tent caterpillar ( Malacosoma disstria Hübner), blackheaded budworm ( Acleris variana Fernie), and jack pine budworm ( Choristoneura pinus Freeman). Using scanning electron images of scales, we made qualitative and quantitative comparisons of morphological traits at the ultrastructural level. We found that hemlock looper and eastern blackheaded budworm scales could be categorically separated from each other and from the three other species. We developed a quadratic discriminant function using measurements of ultrastructure traits that distinguishes scales of the three remaining species with an overall accuracy of 66%. We found that forest tent caterpillar could be well separated based on these traits, but we were less confident in distinguishing the closely related jack pine and spruce budworm. Our method offers potential advantages in scale identification for future studies in paleoecology, while providing the additional advantage of not requiring intact, unfolded, and undamaged scales.


2018 ◽  
Vol 150 (4) ◽  
pp. 499-510
Author(s):  
Rachid Sabbahi ◽  
Lucie Royer ◽  
James E. O’Hara ◽  
Andrew M.R. Bennett

AbstractA rearing study of egg and larval parasitoids of hemlock looper (Lambdina fiscellaria (Guenée); Lepidoptera: Geometridae) was undertaken during an outbreak of this pest in Labrador, Newfoundland and Labrador, Canada. Six parasitoid species were found: Telenomus coloradensis Crawford and T. droozi Muesebeck (Hymenoptera: Platygastridae), Winthemia occidentis Reinhard and Blondelia eufitchiae (Townsend) (Diptera: Tachinidae), as well as one species of Phobocampe Förster and Mesochorus vittator (Zetterstedt) (Hymenoptera: Ichneumonidae). None of them was a new Canadian record. To facilitate understanding of the regional parasitoid assemblage in Labrador, we compiled all published records in Canada and collated all specimen records from the Canadian National Collection of Insects, Arachnids, and Nematodes (Ottawa, Ontario, Canada). This comprehensive list will aid researchers interested in potential biological control candidates for hemlock looper.


2015 ◽  
Vol 17 (4) ◽  
pp. 347-354
Author(s):  
Martin Lukas Seehausen ◽  
Éric Bauce ◽  
Jacques Régnière ◽  
Richard Berthiaume

2015 ◽  
Vol 73 ◽  
pp. 60-69 ◽  
Author(s):  
Rosemarie Vallières ◽  
Sophie Rochefort ◽  
Richard Berthiaume ◽  
Christian Hébert ◽  
Éric Bauce

2013 ◽  
Vol 149 (3) ◽  
pp. 206-218 ◽  
Author(s):  
Johanne Delisle ◽  
Alain Labrecque ◽  
Lucie Royer ◽  
Michèle Bernier-Cardou ◽  
Éric Bauce ◽  
...  

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