SCOLYTIDAE ASSOCIATED WITH FELLED WHITE SPRUCE IN ALASKA

1984 ◽  
Vol 116 (3) ◽  
pp. 465-471 ◽  
Author(s):  
Richard A. Werner ◽  
Edward H. Holsten
Keyword(s):  
Species Diversity ◽  
White Spruce ◽  
Trypodendron Lineatum ◽  
Brooks Range ◽  
Kenai Peninsula ◽  
Dryocoetes Affaber ◽  
Baited Traps ◽  
Ips Perturbatus

AbstractPheromone baited traps and trap trees attracted an aggregate of 29 scolytid species associated with white spruce in three localities in Alaska. Species diversity was higher in the Fairbanks (lat. 64°45′) area than in the Brooks Range (lat. 68°15′) or Kenai Peninsula (lat. 60°37′). Scolytids were found inhabiting all bark-producing areas of the tree from the roots to small branches with the highest density in the tree bole. The most abundant scolytids were Ips perturbatus (Eichhoff), Ips tridens tridens (Mannerheim), Polygraphus rufipennis (Kirby), Dryocoetes affaber (Mannerheim), Trypodendron lineatum (Olivier), and Scolytus piceae (Swaine).

SCOLYTID FLIGHT IN WHITE SPRUCE STANDS IN ALASKA

1972 ◽  
Vol 104 (12) ◽  
pp. 1977-1983 ◽  
Author(s):  
Roy C. Beckwith
Keyword(s):  
White Spruce ◽  
Coastal Areas ◽  
Early Summer ◽  
Trypodendron Lineatum ◽  
Dendroctonus Rufipennis ◽  
Kenai Peninsula ◽  
Interior Alaska ◽  
Dryocoetes Affaber ◽  
Spruce Stands

AbstractWithin white spruce stands near Fairbanks, Alaska, and on the Kenai Peninsula, Alaska, Dendroctonus rufipennis, Ips spp., and Trypodendron lineatum disperse in late May and early June; other scolytids fly during June and July. Flight in interior Alaska precedes by about 2 weeks that on the Kenai Peninsula. Mean daily temperatures during spring and early summer are generally warmer in the interior than in coastal areas. There was a large increase in the total number of beetles in a thinned area, mostly of Dryocoetes affaber.

LINEATIN ENANTIOMER PREFERENCE, FLIGHT PERIODS, AND EFFECT OF PHEROMONE CONCENTRATION AND TRAP LENGTH ON THREE SYMPATRIC SPECIES OF TRYPODENDRON (COLEOPTERA: SCOLYTIDAE)

2000 ◽  
Vol 132 (6) ◽  
pp. 877-887 ◽  
Author(s):  
B.S. Lindgren ◽  
S.E.R. Hoover ◽  
A.M. MacIsaac ◽  
C.I. Keeling ◽  
K.N. Slessor
Keyword(s):  
Sex Ratio ◽  
Reproductive Isolation ◽  
Release Rate ◽  
Sympatric Species ◽  
Ambrosia Beetle ◽  
Flight Period ◽  
Trypodendron Lineatum ◽  
Temporal Separation ◽  
Baited Traps ◽  
Pheromone Concentration

AbstractThe effects of lineatin enantiomer ratios, lineatin release rate, and trap length on catches and the flight periods of three sympatric species of Trypodendron Stephens were investigated in field bioassays using multiple-funnel traps. The ambrosia beetle, Trypodendron betulae Swaine, was caught in similar numbers in baited traps and blank control traps, showing that this species does not respond to lineatin. Our results confirmed that Trypodendron lineatum (Olivier) is attracted only to (+)-lineatin. Trypodendron rufitarsus (Kirby) and Trypodendron retusum (LeConte) were shown to utilize lineatin and like T. lineatum were caught only when (+)-lineatin was present. These results indicate that lineatin does not govern reproductive isolation among these three species. There was no effect by (+)-lineatin release rate within the range tested. The flight of T. rufitarsus commenced earlier and ceased before the peak of the T. lineatum flight, suggesting that temporal separation may be an important component of reproductive isolation between these two species. The flight period of T. retusum was similar to that of T. lineatum. Host odours may aid in reproductive isolation of these two species. Enantiomer blend did not significantly affect sex ratio in any species; however, sex ratio differed among species, indicating that different species responded differently to the traps or that natural sex ratios differ. Catches of T. rufitarsus and T. retusum increased with trap length when pheromone release per trap was held constant and when release was held constant relative to trap length. Trap length and release rate did not affect sex ratio.

scholarly journals Drought-induced stomatal closure probably cannot explain divergent white spruce growth in the Brooks Range, Alaska, USA

Ecology ◽  
2016 ◽  
Vol 97 (1) ◽  
pp. 145-159 ◽  
Author(s):  
Annalis H. Brownlee ◽  
Patrick F. Sullivan ◽  
Adam Z. Csank ◽  
Bjartmar Sveinbjörnsson ◽  
Sarah B. Z. Ellison
Keyword(s):  
Stomatal Closure ◽  
White Spruce ◽  
Brooks Range

A SURVEY FOR THE AMBROSIA BEETLES TRYPODENDRON LINEATUM AND GNATHOTRICHUS RETUSUS (COLEOPTERA: SCOLYTIDAE) IN A SAWMILL USING PHEROMONE-BAITED TRAPS

1985 ◽  
Vol 117 (1) ◽  
pp. 49-55 ◽  
Author(s):  
T. L. Shore ◽  
J. A. McLean
Keyword(s):  
Temporal Distribution ◽  
Distribution Patterns ◽  
Mass Trapping ◽  
Spatial And Temporal Distribution ◽  
Trypodendron Lineatum ◽  
Ambrosia Beetles ◽  
Baited Traps

AbstractThe pheromones lineatum and (+)-sulcatol were used in traps in a sawmill to survey the ambrosia beetles Trypodendron lineatum (Olivier) and Gnathotrichus retusus (LeConte) respectively. Spatial and temporal distribution patterns for both species were identified. This information can be used for the establishment of a pheromone-based mass-trapping program for ambrosia beetles. The addition of ethanol and α-pinene to traps baited with (+)-sulcatol significantly increased the catches of G. retusus.

White spruce regeneration following a major spruce beetle outbreak in forests on the Kenai Peninsula, Alaska

2008 ◽  
Vol 255 (10) ◽  
pp. 3571-3579 ◽  
Author(s):  
Keith Boggs ◽  
Michelle Sturdy ◽  
Daniel J. Rinella ◽  
Matthew J. Rinella
Keyword(s):  
White Spruce ◽  
Kenai Peninsula ◽  
Spruce Beetle

FACTORS INFLUENCING THE EFFICIENCY OF PHEROMONE-BAITED TRAPS FOR THREE SPECIES OF AMBROSIA BEETLES (COLEOPTERA: SCOLYTIDAE)

1983 ◽  
Vol 115 (3) ◽  
pp. 303-313 ◽  
Author(s):  
B. S. Lindgren ◽  
J. H. Borden ◽  
L. Chong ◽  
L. M. Friskie ◽  
D. B. Orr
Keyword(s):  
Aggregation Pheromone ◽  
Release Rate ◽  
Mass Trapping ◽  
Trypodendron Lineatum ◽  
Ambrosia Beetles ◽  
Factors Influencing ◽  
Forest Margin ◽  
Baited Traps ◽  
Funnel Trap ◽  
Better Than

AbstractThe optimal release rate of the aggregation pheromone, lineatin, for trapping Trypodendron lineatum (Olivier) was 40 μg/24h. Sticky vane traps were more efficient than three other trap types for T. lineatum and Gnathotrichus retusus (LeConte). For G. sulcatus (LeConte), a multiple funnel trap was more efficient than a sticky cylinder trap but no better than vane traps or Scandinavian drainpipe traps. Placement of bait in the middle or bottom of drainpipe traps increased their efficiency in capturing T. lineatum and G. sulcatus. Multiple funnel traps and drainpipe traps releasing lineatin at 10 μg/24h, with an additional dispenser releasing lineatin at 30 μg/24h 1.5–2 m away from the trap caught more T. lineatum than traps releasing lineatin at 10 μg/24h, and were as efficient as traps releasing the pheromone at 40 μg/24h. Thus, the beetles respond strongly to the trap silhouette once attracted to its vicinity. In late April traps placed 15–25 m inside the forest margin caught more T. lineatum than traps at the margin, probably intercepting overwintering beetles before they left the forest. A few strategically placed vane traps among numerous multiple funnel or drainpipe traps are recommended for mass trapping of ambrosia beetles in timber processing areas.

AN EVALUATION OF THREE TRAPS AND TWO LURES FOR THE AMBROSIA BEETLE TRYPODENDRON LINEATUM (OLIV.) (COLEOPTERA: SCOLYTIDAE) IN CANADA, NORWAY, AND WEST GERMANY

1987 ◽  
Vol 119 (3) ◽  
pp. 273-280 ◽  
Author(s):  
J.A. McLean ◽  
A. Bakke ◽  
H. Niemeyer
Keyword(s):  
British Columbia ◽  
West Germany ◽  
Ambrosia Beetle ◽  
Trypodendron Lineatum ◽  
Baited Traps

AbstractMultiple funnel, Schlitzfalle, and drainpipe traps baited with Linoprax® or Biolure® semiochemical baiting systems for the ambrosia beetle Trypodendron lineatum (Oliv.) were evaluated in similar experiments in British Columbia, West Germany, and Norway. In British Columbia, the Biolure-baited traps caught more T. lineatum of both sexes than did Linoprax-baited traps. The Linoprax-baited traps caught more male T. lineatum in West Germany and Norway but fewer females than the Biolure system. Low percentages of female T. lineatum were often recorded at drainpipe traps.

Mortality of white spruce during a spruce beetle outbreak on the Kenai Peninsula in Alaska

1983 ◽  
Vol 13 (1) ◽  
pp. 96-101 ◽  
Author(s):  
Richard A. Werner ◽  
Edward H. Holsten
Keyword(s):  
White Spruce ◽  
Permanent Plots ◽  
Kenai Peninsula ◽  
South Central ◽  
Creek Watershed ◽  
Spruce Beetle ◽  
Spruce Stands ◽  
Long Term Impact ◽  
The Impact

White spruce (Piceaglauca (Moench) Voss) stands in the Resurrection Creek watershed in south-central Alaska were infested by spruce bettles, Dendroctonusrufipennis Kirby, between 1974 and 1975. Thirty permanent plots were established within the infested area in 1976 to evaluate the immediate and long-term impact on white spruce stands. Plots were revisited annually for 5 years. Between 1976 and 1980, 29% of all white spruce was killed by spruce beetles. This loss accounted for 59% of the commercial white spruce volume in the watershed. Mortality was greatest in the larger diameter classes during the early part of the infestation, but smaller diameter trees were subsequently attacked as the number of noninfested trees declined. The impact of spruce beetles on structure and species composition of white spruce stands is given along with a discussion of management implications.

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