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.

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.

The role of oleoresin flow in the induced response of loblolly pine to a southern pine beetle associated fungus

2003 ◽  
Vol 81 (4) ◽  
pp. 368-374 ◽  
Author(s):  
Robert A Tisdale ◽  
T Evan Nebeker ◽  
John D Hodges
Keyword(s):  
Loblolly Pine ◽  
Bark Beetles ◽  
Dendroctonus Frontalis ◽  
Southern Pine Beetle ◽  
Induced Response ◽  
Resin Flow ◽  
Southern Pine ◽  
Pine Beetle ◽  
Blue Stain ◽  
Induced Reaction

The influence of total resin flow in loblolly pine, Pinus taeda L., on initial inoculation of the blue stain fungus Ophiostoma minus (Hedgc.) Syd. & P. Syd., a fungal associate of southern pine beetle (Dendroctonus frontalis Zimmermann (Coleoptera:Scolytidae)), was investigated. Resin flow of trees was mechanically manipulated so that it followed the same pattern of decrease and near cessation as seen in trees successfully attacked by southern pine beetle. There were also intermediate treatments where resin flow was allowed to recover. The fungus was inoculated into holes drilled to the xylem surface and allowed to grow for a specified time period. The lesion that formed as a result of the induced reaction was then measured and compared with lesions formed in trees for which resin flow was not manipulated. The experiment was conducted three times in 1993 and 1994 and twice in 1995. It was hypothesized that with decreased resin flow, O. minus would be less inhibited and that growth would be greater before being stopped by the induced reaction. It was found that longer lesions occurred in trees where wounding was prolonged and resin flow was decreased below that of control trees. Mixed results were obtained for trees in intermediate wounding treatments.Key words: oleoresin, blue stain fungus, defenses, bark beetles, induced reaction, Dendroctonus.

Role of Oleoresin Flow in Initial Colonization of Loblolly Pine by Southern Pine Beetle (Coleoptera: Scolytidae)

2003 ◽  
Vol 38 (4) ◽  
pp. 576-582 ◽  
Author(s):  
Robert A. Tisdale ◽  
T. Evan Nebeker ◽  
John D. Hodges
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Dendroctonus Frontalis ◽  
Southern Pine Beetle ◽  
Resin Flow ◽  
Southern Pine ◽  
Pine Beetle ◽  
Pinus Taeda L

The influence of total resin flow in loblolly pine, Pinus taeda L., on initial colonization by the southern pine beetle, Dendroctonus frontalis Zimmermann (Coleoptera: Scolytidae), was investigated. Resin flow of trees was manipulated mechanically so that it followed the same pattern of decrease and near cessation as seen in trees successfully attacked by southern pine beetle. There were also intermediate treatments where resin flow was allowed to recover after near cessation. Beetles were introduced by means of mesh cages attached to the mid-bole of trees and left until the end of the longest wounding treatment. In trees where resin flow was reduced, significant increases in number of attacks, total gallery length, and length of gallery free of resin occurred.

scholarly journals ECONOMIC PERFORMANCE OF LOBLOLLY PINE STANDS IN SOUTHERN BRAZIL AS A RESULT OF DIFFERENT CROWN THINNING INTENSITIES1

2019 ◽  
Vol 43 (2) ◽  
Author(s):  
Mário Dobner Jr ◽  
Dagoberto Stein de Quadros
Keyword(s):  
Loblolly Pine ◽  
Economic Performance ◽  
Southern Brazil ◽  
Expectation Value ◽  
Economic Output ◽  
Land Expectation Value ◽  
Pine Trees ◽  
Crown Thinning ◽  
Log Price ◽  
Pinus Taeda L

ABSTRACT Approximately 1.6 million hectares of southern Brazil are cultivated with pines, and mainly with the loblolly pine (Pinus taeda L.). More than one third of the stands belong to independent log producers, whose aim is to maximize their economic results. In this study, a thinning experiment was evaluated over a production period of 30 years. The stands evaluated were submitted to three different crown thinning intensities, with an unthinned stand used as a control. The aim of the study was to evaluate economic criteria regarding realistic discount rates and production periods varying between 16-30 years. For the circumstances that were evaluated, 'extreme' and early release from competition of pruned loblolly pine trees lead to the best economic performance (land expectation value = ~36,000 US$ ha-1, i = 3% yr-1). Stands subjected to crown thinnings, independently of intensity, produced three times the economic output of unthinned and unpruned stands. Although the optimal harvest ages, according to the internal rate of return, are between 18-22 years for thinned and unthinned stands, from a long-term perspective (land expectation value) and for the current relationship between log price and size, the optimal economic performance requires that production periods are extended (to 24-26 years) from those currently practised in southern Brazil (15-20 years).

Average radial growth rate and chlamydospore production of Ceratocystis minor, Ceratocystis minor var. barrasii, and SJB 122 in culture

1989 ◽  
Vol 67 (12) ◽  
pp. 3498-3505 ◽  
Author(s):  
David S. Goldhammer ◽  
Frederick M. Stephen ◽  
Timothy D. Paine
Keyword(s):  
Growth Rate ◽  
Uric Acid ◽  
Loblolly Pine ◽  
Radial Growth ◽  
Dendroctonus Frontalis ◽  
Radial Growth Rate ◽  
Acid Media ◽  
Low Concentrations ◽  
Pinus Taeda L ◽  
Ceratocystis Minor

Two symbiotic fungi (SJB 122, an unidentified basidiomycete, and Ceratocystis minor (Hedgecock) Hunt variety barrasii Taylor) and one pathogenic phoretic fungus (C. minor (Hedgecock) Hunt variety minor) of the southern pine beetle, Dendroctonus frontalis Zimmermann, were inoculated onto six different concentrations of D. frontalis frass, loblolly pine (Pinus taeda L.) phloem, and uric acid media to observe radial growth rates and chlamydospore production. The average radial growth rate per day of C. minor var. barrasii increased significantly from the control on all three media, but growth was faster at increased concentrations of added phloem compared with the other supplemented media. Significant increases in chlamydospores produced by C. minor var. barrasii from the control occurred only on frass media, with more chlamydospores being produced at higher concentrations. The average radial growth rate per day of SJB 122 fungus increased significantly from the control on only one concentration of phloem and two concentrations of uric acid, but decreased significantly on low concentrations of frass media. SJB 122 chlamydospore production increased with increasing concentration on frass, was not different from the control on phloem, and increased significantly at intermediate concentrations on uric acid. Ceratocystis minor var. minor average radial growth rate per day increased with increasing concentration on both frass and phloem media but on uric acid decreased significantly at higher concentrations, following an initial signficant increase as compared with the controls.

scholarly journals Susceptibility of parent and interspecific F1 hybrid pine trees to tip moth damage in a coastal North Carolina planting

2001 ◽  
Vol 31 (5) ◽  
pp. 919-923 ◽  
Author(s):  
Maxine T Highsmith ◽  
John Frampton ◽  
David O'Malley ◽  
James Richmond ◽  
Martesa Webb
Keyword(s):  
North Carolina ◽  
Loblolly Pine ◽  
Dominant Mode ◽  
Slash Pine ◽  
F1 Hybrids ◽  
F1 Hybrid ◽  
Pine Trees ◽  
Rhyacionia Frustrana ◽  
Hybrid Pine ◽  
Pinus Taeda L

Tip moth damage among families of parent pine species and their interspecific F1 hybrids was quantitatively assessed in a coastal planting in North Carolina. Three slash pine (Pinus elliotti var. elliotti Engelm.), two loblolly pine (Pinus taeda L.), and four interspecific F1 hybrid pine families were used. The F1 hybrids were as susceptible to damage by Nantucket pine tip moth (Rhyacionia frustrana (Comst.)), as was their susceptible loblolly pine parent. Their phenotypes support a dominant or partially dominant mode of inheritance for susceptibility. The phenotype of one slash pine family was not statistically different from the phenotypes of the loblolly and F1 hybrid pines. The high susceptibility of that one slash pine family appeared to be intrinsic, even though slash pine is considered resistant to tip moth damage. Tip moth damage on the two other slash pine families was significantly lower.

INCIDENCE OF THE PINEWOOD NEMATODE1 IN A SOUTHERN PINE BEETLE2 INFESTATION IN CENTRAL LOUISIANA

1986 ◽  
Vol 21 (2) ◽  
pp. 114-117 ◽  
Author(s):  
D. N. Kinn
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Bursaphelenchus Xylophilus ◽  
Dendroctonus Frontalis ◽  
Southern Pine Beetle ◽  
Pinewood Nematode ◽  
Southern Pine ◽  
Pine Beetle ◽  
Pinewood Nematodes ◽  
Pinus Taeda L

A large infestation of southern pine beetle, (Dendroctonus frontalis Zimm.), located in central Louisiana, was surveyed for the pinewood nematode, Bursaphelenchus xylophilus (Steiner and Buhrer) Nickle. Pinewood nematodes were present in 4.2 percent of 94 loblolly pine (Pinus taeda L.) trees attacked by D. frontalis and were absent from 101 unattacked trees that surrounded the infestation. Monthly sampling of this infestation revealed an increase in the incidence of nematodes as the season progressed. Samples taken from different heights on beetle infested-boles did not differ significantly in the presence of nematodes.

Green and Dry-Weight Equations for Above-ground Components of Planted Loblolly Pine Trees in the West Gulf Region

1987 ◽  
Vol 11 (4) ◽  
pp. 212-218 ◽  
Author(s):  
V. C. Baldwin
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Weight Ratio ◽  
Dry Weight ◽  
Prediction Equations ◽  
Gulf Region ◽  
The West ◽  
Biomass Equations ◽  
Pine Trees ◽  
Pinus Taeda L

Abstract Prediction equations based on 130 sample trees from thinned and unthinned loblolly pine (Pinus taeda L.) plantations in central Louisiana are presented for the green and dry weights of aboveground tree components. Sample trees ranged from 2 to 21 in. dbh, 18 to 94 ft in height and from 9 to 55 yr in age. Significant differences in partial stem weight between trees from thinned and unthinned stands required development of separate sets of weight ratio equations. The range of the studies' observations increases the predictive applicability of planted loblolly pine biomass equations. South. J. Appl. For. 11(4):212-218.

scholarly journals Which Trees and Stands are attacked by the Southern Pine Beetle?

1999 ◽  
Vol 23 (4) ◽  
pp. 217-223 ◽  
Author(s):  
Yujia Zhang ◽  
Boris Zeide
Keyword(s):  
Loblolly Pine ◽  
Dendroctonus Frontalis ◽  
Southern Pine Beetle ◽  
Southern Pine ◽  
Model Driven ◽  
Pine Tree ◽  
Hardwood Species ◽  
Pine Beetle ◽  
Pinus Taeda L ◽  
Individual Trees

Abstract An analysis of long-term observations from loblolly pine (Pinus taeda L.) plantations showed that the southern pine beetle, SPB (Dendroctonus frontalis Zimmermann), kills a larger proportion of trees in dense stands. The presence of hardwood species diminishes damage, probably by hindering the dispersal of the SPB. It was also found that, in a given stand, mortality increases with tree size. On the other hand, the degree of damage was not related to age or mean diameter. For our plots, the annual probability that a loblolly pine tree would be killed by the beetle was 4.59 x 10-4. In the SPB infested stands, this probability increased 39 times (1.81 x 10-2. More precise estimates can be made using a prediction model driven by stand densities of pines and hardwoods, and the relative diameter of individual trees. South. J. Appl. For. 23(4):217-223.

Sign in / Sign up

Export Citation Format

Share Document