AGGREGATION BEHAVIOR OF DENDROCTONUS PONDEROSAE (COLEOPTERA: SCOLYTIDAE) IN RESPONSE TO CHEMICAL MESSENGERS

1969 ◽  
Vol 101 (2) ◽  
pp. 143-149 ◽  
Author(s):  
G. B. Pitman ◽  
J. P. Vité
Keyword(s):  
Dendroctonus Ponderosae ◽  
Dendroctonus Frontalis ◽  
Aggregation Behavior ◽  
Field Conditions ◽  
Insect Pheromone ◽  
Dendroctonus Brevicomis ◽  
Host Volatiles ◽  
Pine Trees ◽  
Per Se ◽  
Chemical Messengers

AbstractPopulations of Dendroctonus ponderosae Hopk. aggregate on pine trees in response to a combination of host- and insect-produced volatiles. Release of the insect-generated volatiles by defecation coincides with the release of host volatiles as resin exudes from the galleries initiated by the female beetles. When tested with oleoresin under field conditions, synthetic trans-verbenol, the major insect pheromone, was highly attractive to both sexes of D. ponderosae. Also, emergent female Dendroctonus brevicomis Lec. and Dendroctonus frontalis Zimm. crushed to powder at −70 °C were attractive; emergent females of both species are known to contain large amounts of trans-verbenol. Trans-verbenol per se, however, was not attractive to walking or flying D. ponderosae.

INSECT AND HOST ODORS IN THE AGGREGATION OF THE WESTERN PINE BEETLE

1969 ◽  
Vol 101 (2) ◽  
pp. 113-117 ◽  
Author(s):  
J. P. Vité ◽  
G. B. Pitman
Keyword(s):  
Sex Ratio ◽  
Pinus Ponderosa ◽  
Dendroctonus Ponderosae ◽  
Insect Pheromone ◽  
Dendroctonus Brevicomis ◽  
Western Pine Beetle ◽  
Pine Beetle ◽  
Host Odor ◽  
Host Odors ◽  
Per Se

AbstractDendroctonus brevicomis Lec. responded in flight to combinations of insect- and host-produced volatiles. Emergent female beetles crushed at −70 °C, as well as synthetic exo-7-ethyl-5-methyl-6, 8-dioxabicyclo [3.2.1] octane (“brevicomin”) attracted both sexes of the western pine beetle when offered with oleoresin freshly tapped from the host, Pinus ponderosa Laws. Offered separately, these materials were inactive. Crushed emergent Dendroctonus ponderosae Hopk. males per se, however, attracted flying D. brevicomis in appreciable numbers. Dominance of either host odor or insect pheromone appeared to govern the sex ratio of the responding insects.

Seasonal Abundance, Arrival and Emergence Patterns of Predaceous Hister Beetles (Coleoptera: Histeridae) Associated with Ips Engraver Beetles (Coleoptera: Scolytidae) in Louisiana

2003 ◽  
Vol 38 (4) ◽  
pp. 612-620 ◽  
Author(s):  
William P. Shepherd ◽  
Richard A. Goyer
Keyword(s):  
Loblolly Pine ◽  
Bark Beetles ◽  
Dendroctonus Frontalis ◽  
Seasonal Abundance ◽  
Southern Pine Beetle ◽  
Visual Orientation ◽  
Sticky Traps ◽  
Emergence Patterns ◽  
Pine Beetle ◽  
Pine Trees

The most common predaceous hister beetles (Coleoptera: Histeridae) found associated with Ips engraver beetles (Coleoptera: Scolytidae) in southern Louisiana were Platysoma attenuata LeConte, P. cylindrica (Paykull), P. parallelum (Say), and Plegaderus transversus (Say). The seasonal abundance of histerids caught in flight traps coincided with Ips spp. activity in the area. Histerid adults were initially caught in sticky traps on Ips-infested loblolly pine logs 1 wk after Ips spp. attacks had begun. As a group, histerids emerged from logs in a bimodal pattern with the first peak occurring during Ips spp. emergence and a second 4 wks later. The abundance of P. parallelum and P. transversus indicates that they likely fed on bark beetles and organisms arriving later in the colonization sequence. Visual orientation appeared to play a role in attraction of histerids to logs colonized by bark beetles. Platysoma attenuata preferred vertically-positioned logs to horizontal logs, while P. parallelum was the opposite. These results suggest that some histerids may be visually attracted to horizontal silhouettes, such as pine trees that have been blown down or felled and often are infested by Ips spp. Other hister beetles may prefer vertical silhouettes, such as standing pines, which tend to be colonized by the southern pine beetle, Dendroctonus frontalis Zimmermann.

Distribution of Attacks by Dendroctonus ponderosae Hopk. on Pinus contorta Dougl. var. latifolia Engelm.

1965 ◽  
Vol 97 (2) ◽  
pp. 207-215 ◽  
Author(s):  
R. F. Shepherd
Keyword(s):  
Spatial Distribution ◽  
Frequency Distribution ◽  
Small Area ◽  
Pinus Contorta ◽  
Dendroctonus Ponderosae ◽  
Important Influence ◽  
Sampling Techniques ◽  
Area Sampling ◽  
Pine Trees ◽  
Number Of Branches

AbstractThe incidence of attacks by Dendroctonus ponderosae Hopk. (= monticolae) was recorded by square-foot quadrats from the total bark surface of 60 lodgepole pine trees, Pinus contorta Dougl. var. latifolia Engelm., according to location on the tree, proximity to branches, and degree of bark roughness. The frequency distribution of attack density was bimodal, but the bimodality was an artifact of sampling from a population having a varying mean density. A log (x + 1) transformation of the data permits the use of parametric tests. Alternative non-area sampling techniques showed that the spatial distribution of attacks within a small area tended toward regularity, probably following the distribution of bark niches. The greatest variance in attack density was associated with height, followed by areas, trees, diameters and aspects. Bark roughness was an important influence of distribution but number of branches was not.

Gallery initiation byTomicus piniperda (Coleoptera: Scolytidae) on scots pine trees baited with host volatiles

1987 ◽  
Vol 13 (7) ◽  
pp. 1591-1599 ◽  
Author(s):  
L. M. Schroeder ◽  
H. H. Eidmann
Keyword(s):  
Scots Pine ◽  
Host Volatiles ◽  
Pine Trees

Loblolly pine responds to mechanical wounding with increased resin flow

1998 ◽  
Vol 28 (4) ◽  
pp. 596-602 ◽  
Author(s):  
Jonathan J Ruel ◽  
Matthew P Ayres ◽  
Peter L Lorio, Jr.
Keyword(s):  
Loblolly Pine ◽  
Bark Beetles ◽  
Defense Mechanism ◽  
Dendroctonus Frontalis ◽  
Resin Flow ◽  
Mechanical Wounding ◽  
Pine Trees ◽  
Plant Defense Mechanism ◽  
Pre Treatment ◽  
Pinus Taeda L

The oleoresin produced by many conifers has a deleterious effect on numerous associated herbivores, including bark beetles (Coleoptera: Scolytidae), and may have evolved as a plant defense mechanism. Three experiments with juvenile loblolly pine (Pinus taeda L.) used mechanical wounding to drain resin reserves and assess the effects of prior bark wounding on subsequent resin flow up to 7 days post-treatment. Resin flow returned to pre-treatment values within 2 days after wounding began and, in nearly every tree in each experiment, continued to increase on subsequent days. On average, resin flow reached double the pre-treatment values (mean ± SE: 2.10 ± 0.10 vs. 1.13 ± 0.10 g/3 h and 2.28 ± 0.09 vs. 0.90 ± 0.09 g/3 h for wounded vs. pre-treatment in experiments 1 and 2, respectively). Considering its timing and magnitude, this previously undescribed response may be important in modulating interactions between pine trees and bark beetles. In addition, resin flow following treatment was greater in trees in larger crown size classes (thinned > edge of stand = unthinned in experiment 1; edge of stand > thinned > unthinned in experiment 2). This may help explain why trees in thinned stands are less susceptible to southern pine beetle (Dendroctonus frontalis Zimm.) infestation than trees in unthinned stands.

Non-staining fungi associated with the bark beetle Dendroctonus brevicomis (Coleoptera: Scolytidae) on Pinus ponderosa

1972 ◽  
Vol 50 (9) ◽  
pp. 1943-1945 ◽  
Author(s):  
H. S. Whitney ◽  
F. W. Cobb Jr.
Keyword(s):  
Bark Beetle ◽  
Pinus Ponderosa ◽  
Ponderosa Pine ◽  
Dendroctonus Brevicomis ◽  
Western Pine Beetle ◽  
Pine Beetle ◽  
Pine Trees ◽  
Ceratocystis Minor

Three fungi—Ceratocystis nigrocarpa Davidson, an unidentified hyphomycete, and an unidentified basidiomycete—were isolated from extensive non-stained areas of sapwood of ponderosa pine infested with western pine beetle, Dendroctonus brevicomis Lec., in California. The two unidentified fungi were also present in the thoracic mycangium of the female beetle while C. nigrocarpa was found only externally on the beetle. The mycangium and its contents are illustrated. Ceratocystis minor (Hedgc.) Hunt, which was also found externally on the beetle but not in the mycangium, was isolated only from scattered patches of blue-stained sapwood. It is suggested that non-staining fungi play a role in causing the death of ponderosa pine trees attacked by D. brevicomis.

Earliness per se effects on developmental traits in hexaploid wheat grown under field conditions

2018 ◽  
Vol 99 ◽  
pp. 214-223 ◽  
Author(s):  
Helga Ochagavía ◽  
Paula Prieto ◽  
Roxana Savin ◽  
Simon Griffiths ◽  
Gustavo A. Slafer
Keyword(s):  
Hexaploid Wheat ◽  
Field Conditions ◽  
Earliness Per Se ◽  
Per Se ◽  
Developmental Traits

The response of mountain pine beetle (Dendroctonus ponderosae) to lodgepole pine trees baited with verbenone and exo-brevicomin

1992 ◽  
Vol 18 (4) ◽  
pp. 533-541 ◽  
Author(s):  
T. L. Shore ◽  
L. Safranyak ◽  
B. S. Lindgren
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Pine Trees

scholarly journals Southern Pine Beetle, Dendroctonus frontalis Zimmermann (Insecta: Coleoptera: Scolytidae)

EDIS ◽  
1969 ◽  
Vol 2004 (4) ◽  
Author(s):  
James R. Meeker ◽  
Wayne N. Dixon ◽  
John L. Foltz ◽  
Thomas R. Fasulo
Keyword(s):  
Tree Mortality ◽  
Insect Pest ◽  
Historical Review ◽  
Dendroctonus Frontalis ◽  
Control Measures ◽  
Tree Bark ◽  
Southern Pine Beetle ◽  
Southern Pine ◽  
Pine Beetle ◽  
Pine Trees

The southern pine beetle (SPB), Dendroctonus frontalis Zimmermann, is the most destructive insect pest of pine in the southern United States. A recent historical review estimated that SPB caused $900 million of damage to pine forests from 1960 through 1990 (Price et a1. 1992). This aggressive tree killer is a native insect that lives predominantly in the inner bark of pine trees. Trees attacked by SPB often exhibit hundreds of resin masses (i.e., pitch tubes) on the outer tree bark. SPB feed on phloem tissue where they construct winding S-shaped or serpentine galleries. The galleries created by both the adult beetles and their offspring can effectively girdle a tree, causing its death. SPB also carry, and introduce into trees, blue-stain fungi. These fungi colonize xylem tissue and block water flow within the tree, also causing tree mortality (Thatcher and Conner 1985). Consequently, once SPB have successfully colonized a tree, the tree cannot survive, regardless of control measures. his document is EENY-176 (originally published as DPI Entomology Circular 369), one of the Featured Creatures series of the Entomology and Nematology Department, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published: November 2000. Revised: March 2004. EENY-176/IN333: Southern Pine Beetle, Dendroctonus frontalis (Coleoptera: Curculionidae: Scolytinae) (ufl.edu)  

Sign in / Sign up

Export Citation Format

Share Document