scholarly journals Constituent and Induced Tannin Accumulations in Roots of Loblolly Pines

1999 ◽  
pp. 843-852 ◽  
Author(s):  
Charles H. Walkinshaw
Keyword(s):  
Loblolly Pines

Biomass Production and Nitrogen Recovery after Fertilization of Young Loblolly Pines

1974 ◽  
Vol 38 (6) ◽  
pp. 958-961 ◽  
Author(s):  
J. B. Baker ◽  
G. L. Switzer ◽  
L. E. Nelson
Keyword(s):  
Biomass Production ◽  
Nitrogen Recovery ◽  
Loblolly Pines

Insects Affecting Seed Production in Red Pine: Part I Conophthorus resinosae Hopk. (Coleoptera: Scolytidae)

1956 ◽  
Vol 88 (10) ◽  
pp. 599-608 ◽  
Author(s):  
L. A. Lyons
Keyword(s):  
Seed Production ◽  
Pacific Coast ◽  
Large Numbers ◽  
The Pacific ◽  
Future Success ◽  
Loblolly Pines ◽  
Unfavourable Weather ◽  
Cone And Seed Insects ◽  
Seed Crops ◽  
Seed Insects

Natural and artificial reforestation, which basically depend on an abundance of sound seed, are adversely affected when insects destroy large numbers of cones, seeds, and cone-bearing shoots. Other factors, such as unfavourable weather, incomplete seed development, and damage by birds and mammals also reduce seed production, but they are rarely of such widespread importance as insects, whose damage often results in the failure of seed crops over large areas. Cone and seed insects sometimes restrict the natural regeneration of trees for a few years at a time, as, for example, in conifers on the Pacific coast (16), loblolly pines in Virginia (13), and oak in Michigan (5), but they become particularly important when the seeds they destroy are required for use in artificial reforestation. The future success of much reforestation, which is inclining more and more toward the use of seed obtained from trees cultivated especially for that purpose, may largely depend on a thorough understanding of cone and seed insects and their effect on seed production.

scholarly journals Survival of Longleaf and Loblolly Pines Planted at Two Spacings in an East Texas Bahiagrass Silvopasture

2008 ◽  
Vol 32 (1) ◽  
pp. 44-45
Author(s):  
Brian P. Oswald ◽  
Kenneth W. Farrish ◽  
Micah-John Beierle
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Seedling Survival ◽  
Survival Rates ◽  
Pinus Palustris ◽  
Mortality Rates ◽  
Paspalum Notatum ◽  
East Texas ◽  
Forage Production ◽  
Loblolly Pines

Abstract The practice of combining intensive timber and forage production on the same site, a silvopasture system, offers landowners the potential for diversification of income. The establishment of such a system in a pasture setting offers unique challenges compared with traditional timber or forage systems. In 2003, a silvopasture demonstration was established south of Carthage, Texas, in a pasture dominated by bahiagrass (Paspalum notatum). Four replications of treatments composed of open pasture, longleaf (Pinus palustris) and loblolly (Pinus taeda) pine planted at a traditional spacing, and longleaf and loblolly pine planted at a silvopasture spacing were established. Due to high mortality rates, replanting of trees occurred in 2004 and 2005. Third-year seedling survival was highest for loblolly pine in both planting systems, and forage production levels did not significantly differ among treatments. Wild hog damage contributed to the low longleaf pine seedling survival rates.

Tolerance of Loblolly Pines to Fusiform Rust

1995 ◽  
Vol 19 (2) ◽  
pp. 60-64 ◽  
Author(s):  
Charles H. Walkinshaw ◽  
James P. Barnett
Keyword(s):  
Pinus Taeda ◽  
Rust Fungus ◽  
The Other ◽  
Diameter Growth ◽  
Mature Trees ◽  
Fusiform Rust ◽  
Infected Tree ◽  
Loblolly Pines ◽  
Pinus Taeda L ◽  
Natchez Trace Parkway

Abstract Loblolly pines (Pinus taeda L.) that were 8 to 17 yr old tolerated one to three fusiform rust (Cronartium quercuum [Berk.] Miyabe ex Shiraif sp. fusiforme) galls in their stems. Families with four or more galls in their stems lost 25% or more of the trees by age 17. In living trees with less than four stem galls, diameter growth was comparable to that of trees with no galls. Tolerance was indicated by the ability of loblolly pines to maintain the rust fungus in stems that had dbh's similarto asymptomatic trees on the same site. In plantations, the number of galls in the stem was generally one to two per infected tree. This was also true for mature trees (12 to 38 in. dbh) along the Natchez Trace Parkway. These trees have been infected with fusiform rust for nearly 100 yr. On the other hand, the presence of four or more stem galls seems to be a reliable indicator of mortality rather than tolerance. South. J. Applied For. 19 (2): 60-64.

Wound response of loblolly and shortleaf pine attacked or reattacked by Dendroctonusfrontalis Zimmermann (Coleoptera: Scolytidae) or its fungal associate, Ceratocystisminor (Hedgecock) Hunt

1988 ◽  
Vol 18 (1) ◽  
pp. 33-37 ◽  
Author(s):  
Stephen P. Cook ◽  
Fred P. Hain
Keyword(s):  
Average Length ◽  
Wound Response ◽  
Shortleaf Pine ◽  
Initial Exposure ◽  
Wound Site ◽  
Inner Bark ◽  
Pine Beetle ◽  
Loblolly Pines ◽  
Monoterpene Composition ◽  
Fungal Associate

Loblolly, Pinustaeda L., and shortleaf, Pinusechinata Mill., pines respond to attack by the southern pine beetle (SPB), Dendroctonusfrontalis Zimmermann, or invasion by the SPB fungal associate, Ceratocystisminor (Hedgecock) Hunt, by forming a necrotic lesion around the wound site. This response was compared between trees that had no known prior experience with SPB or C. minor (naive trees) and trees that had been exposed to SPB or C. minor the previous year (experienced trees). No significant differences were observed in the average length of the lesions between experienced and naive trees in either pine species. However, the experienced loblolly pines had higher concentrations of inner bark monoterpenes than did the naive loblolly pines and the experienced shortleaf pines had a significantly different inner bark monoterpene composition compared with naive shortleaf pines during the June sample period. The monoterpene composition in unwounded tissue of experienced shortleaf pine closely resembled the observed monoterpene composition of lesion tissue at this time. The observed differences in inner bark monoterpenes following fungal or beetle exposure could render the trees less susceptible to later bark beetle attack for a period of time following the initial exposure.

Response of Newly Planted Loblolly Pines to Herbicide and Nitrogen

1988 ◽  
Vol 12 (1) ◽  
pp. 33-36 ◽  
Author(s):  
William H. McKee ◽  
Larry P. Wilhite
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Coastal Plain ◽  
Fold Increase ◽  
Atlantic Coastal Plain ◽  
Pronounced Increase ◽  
Seedling Biomass ◽  
Loblolly Pines ◽  
Pinus Taeda L ◽  
Atlantic Coastal

Abstract In three separate studies on the Lower Atlantic Coastal Plain, sites were sheared, root-raked, and bedded, and phosphorus was applied. Loblolly pine (Pinus taeda L.) seedlings were planted, and nitrogen fertilizer and preemergence herbicide were applied at several different times. In all three studies, loblolly pine responded positively in height, diameter, and aboveground biomass to herbicide applied in the spring following planting. Responses to nitrogen application were inconsistent. A pronounced increase in growth was found in only one study. There, a nitrogen and a herbicide treatment interacted to give a three-fold increase in aboveground seedling biomass after one growing season. The lack of response to nitrogen in the other two studies may be attributable to low rainfall in the spring after planting and mineralization of native nitrogen from soil organic matter. South. J. Appl. For. 12(1):33-36.

scholarly journals A Tree Quality Scoring System for Immature Loblolly Pine

1997 ◽  
Vol 21 (1) ◽  
pp. 24-27
Author(s):  
Keith L. Belli ◽  
Samuel B. Land ◽  
Howard W. Duzan
Keyword(s):  
Loblolly Pine ◽  
Scoring System ◽  
Subjective Quality ◽  
Computer Algorithm ◽  
Precommercial Thinning ◽  
Dichotomous Key ◽  
Loblolly Pines ◽  
Tree Quality

Abstract A tree quality scoring system was developed for immature loblolly pines to simulate the subjective quality tree grades determined by experienced industrial foresters. The system was designed to be used either in the office via a computer algorithm, or in the field via a dichotomous key. Results showed that both computer and field key performed well in terms of precision, although the key was susceptible to a higher degree of user bias. Both methods produced consistent, or repeatable, results. The scoring system should be useful for precommercial thinning decisions. South. J. Appl. For. 21(1):24-27.

scholarly journals Impact of Spring Sawfly Defoliation on Growth of Loblolly Pine Stands

2005 ◽  
Vol 29 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Boris Zeide ◽  
Lynne C. Thompson
Keyword(s):  
Loblolly Pine ◽  
Multiple Regression Model ◽  
Pine Sawfly ◽  
Multivariate Multiple Regression ◽  
Loblolly Pines ◽  
The Impact ◽  
Neodiprion Taedae Linearis ◽  
Final Harvest ◽  
Moderate Stress ◽  
Actual Loss

Abstract To estimate the impact of a single spring defoliation by loblolly pine sawfly (Neodiprion taedae linearis Ross), diameters of 3,006 loblolly pines from five locations in southeastern Arkansas were measured immediately after defoliation and two more times at 1-year intervals.The proportion of defoliation was assessed at each measurement. An insecticide was used in an attempt to prevent defoliation in subsequent years. Because tree growth depends on many factors, a multivariate multiple regression model was used to separate these effects. The model predicts thata single defoliation reduces annual diameter and volume increment by 17.4, 8.4, and 2.8% for the first, second, and third years after defoliation, respectively (the actual loss was 18.9 and 8.9% for the first 2 years). It was found that trees defoliated 20–40% actuallygrew faster than undefoliated trees. This response, called overcompensation, is a common reaction of plants to moderate stress. Potential losses from defoliation are greatest in sawtimber-sized stands between the ages of 25 and 35 years. The decision to control sawflies should take into accountstand age and time to final harvest. South. J. Appl. For. 29(1):33–39.

Inoculation of Nursery Seedbeds with Pisolithus Tinctorius Spores Mixed with Hydromulch Increases Ectomycorrhizae and Growth of Loblolly Pines

1979 ◽  
Vol 3 (4) ◽  
pp. 175-178 ◽  
Author(s):  
Donald H. Marx ◽  
John G. Mexal ◽  
William G. Morris
Keyword(s):  
Loblolly Pine ◽  
Pisolithus Tinctorius ◽  
Pine Seedlings ◽  
Loblolly Pines

Abstract Different methods of introducing basidiospores (4/5 oz. spores/100 linear ft. of nursery bed) of Pisolithus tinctorius into fumigated soil at Weyerhaeuser's nursery in Oklahoma were tested to determine their effectiveness in forming ectomycorrhizae on loblolly pine seedlings. Two of five methods proved significantly effective. Nearly three-fourths of seedlings treated with spores mixed in hydromulch and applied after sowing formed Pisolithus ectomycorrhizae. The result was 25 percent larger seedlings and 15 percent fewer culls. In plots where spores were dusted onto the soil at sowing, one-third of the seedlings formed Pisolithus ectomycorrhizae, resulting in 12 percent larger seedlings and 13 percent fewer culls.

Microsite Effects on Oleoresin Exudation Pressure of Large Loblolly Pines

Ecology ◽  
1968 ◽  
Vol 49 (6) ◽  
pp. 1207-1210 ◽  
Author(s):  
Peter L. Lorio ◽  
John D. Hodges
Keyword(s):  
Loblolly Pines
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