Seasonal Parasitism and Host Instar Preference by the Spruce Budworm (Lepidoptera: Tortricidae) Larval ParasitoidTranosema rostrale(Hymenoptera: Ichneumonidae)

2016 ◽  
Vol 45 (5) ◽  
pp. 1123-1130 ◽  
Author(s):  
M. Lukas Seehausen ◽  
Jacques Régnière ◽  
Véronique Martel ◽  
Sandy M. Smith
Keyword(s):  
Spruce Budworm ◽  
Host Instar

A method for sampling western spruce budworm pupae.

1981 ◽  
Author(s):  
Nilima Srivastava ◽  
Roy C. Beckwith ◽  
Robert W. Campbell ◽  
Torolf R. Torgersen
Keyword(s):  
Spruce Budworm ◽  
Western Spruce Budworm

Green Woods Model: a forecasting tool for planning timber harvesting and protection of spruce-fir forests attacked by the spruce budworm.

1985 ◽  
Author(s):  
Robert S. Seymour ◽  
Gordon D. Mott ◽  
Steven M. Kleinschmidt ◽  
Peter Triandafillou ◽  
Robert Keane
Keyword(s):  
Spruce Budworm ◽  
Timber Harvesting

scholarly journals Insectivorous songbirds as early indicators of future defoliation by spruce budworm

2021 ◽  
Author(s):  
Marion Germain ◽  
Daniel Kneeshaw ◽  
Louis De Grandpré ◽  
Mélanie Desrochers ◽  
Patrick M. A. James ◽  
...  
Keyword(s):  
Large Scale ◽  
Spatial Scales ◽  
Spruce Budworm ◽  
Detection Methods ◽  
Maximum Probability ◽  
Point Count ◽  
Probability Of Presence ◽  
Time Lagged ◽  
One Year ◽  
Local Sampling

Abstract Context Although the spatiotemporal dynamics of spruce budworm outbreaks have been intensively studied, forecasting outbreaks remains challenging. During outbreaks, budworm-linked warblers (Tennessee, Cape May, and bay-breasted warbler) show a strong positive response to increases in spruce budworm, but little is known about the relative timing of these responses. Objectives We hypothesized that these warblers could be used as sentinels of future defoliation of budworm host trees. We examined the timing and magnitude of the relationships between defoliation by spruce budworm and changes in the probability of presence of warblers to determine whether they responded to budworm infestation before local defoliation being observed by standard detection methods. Methods We modelled this relationship using large-scale point count surveys of songbirds and maps of cumulative time-lagged defoliation over multiple spatial scales (2–30 km radius around sampling points) in Quebec, Canada. Results All three warbler species responded positively to defoliation at each spatial scale considered, but the timing of their response differed. Maximum probability of presence of Tennessee and Cape May warbler coincided with observations of local defoliation, or provided a one year warning, making them of little use to guide early interventions. In contrast, the probability of presence of bay-breasted warbler consistently increased 3–4 years before defoliation was detectable. Conclusions Early detection is a critical step in the management of spruce budworm outbreaks and rapid increases in the probability of presence of bay-breasted warbler could be used to identify future epicenters and target ground-based local sampling of spruce budworm.

scholarly journals Predicting balsam fir mortality in boreal stands affected by spruce budworm

2021 ◽  
Vol 496 ◽  
pp. 119408
Author(s):  
Djidjoho Julien Houndode ◽  
Cornelia Krause ◽  
Hubert Morin
Keyword(s):  
Spruce Budworm ◽  
Balsam Fir

scholarly journals Budworm-linked warblers as early indicators of defoliation by spruce budworm: A field study

2021 ◽  
Vol 125 ◽  
pp. 107543
Author(s):  
Jeanne Moisan Perrier ◽  
Daniel Kneeshaw ◽  
Martin-Hugues St-Laurent ◽  
Peter Pyle ◽  
Marc-André Villard
Keyword(s):  
Field Study ◽  
Spruce Budworm ◽  
Early Indicators
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