Monoterpene composition and fusiform rust resistance in slash and loblolly pines

1995 ◽  
Vol 25 (2) ◽  
pp. 193-197 ◽  
Author(s):  
M. Michelozzi ◽  
T.L. White ◽  
A.E. Squillace ◽  
W.J. Lowe
Keyword(s):  
Loblolly Pine ◽  
Rust Resistance ◽  
Slash Pine ◽  
Cortical Tissue ◽  
Fusiform Rust ◽  
Breeding Values ◽  
Loblolly Pines ◽  
Monoterpene Composition

Monoterpene composition of cortical tissue was analyzed in slash pine (Pinuselliottii Engelm. var. elliottii) and loblolly pine (Pinustaeda L.) clones with known breeding values for fusiform rust resistance. Trees having a relatively high content of β-phellandrene tend to be more resistant than trees with a low β-phellandrene content. Such results confirm previous data and suggest the utilization of β-phellandrene content as an aid in selecting relatively rust resistant slash and loblolly pines.

Stability of Rust Infection Ratios for Resistant and Susceptible Slash and Loblolly Pine Across Rust Hazard Levels

1993 ◽  
Vol 17 (4) ◽  
pp. 188-192 ◽  
Author(s):  
G. R. Hodge ◽  
T. L. White ◽  
R. A. Schmidt ◽  
J. E. Allen
Keyword(s):  
Loblolly Pine ◽  
Rust Resistance ◽  
Economic Benefits ◽  
Slash Pine ◽  
Fusiform Rust ◽  
Breeding Values ◽  
Rust Infection ◽  
Genetically Improved ◽  
Hazard Levels ◽  
Forest Managers

Abstract Fusiform rust resistant and susceptible loblolly and slash pine (bulk mixes of six parents each) were planted at six locations. The ratio of resistant-to-susceptible seedlot infection in both species was stable across all levels of rust hazard across all locations. In other words, the percentage of infected trees in the resistant seedlot was essentially a constant fraction of the percent infection in the susceptible seedlot. The resistant-to-susceptible seedlot infection ratio was 0.225 for loblolly pine and 0.371 for slash pine. For slash pine, predicted breeding values for rust resistance were used to make an accurate prediction of this ratio. The pattern of constant proportional resistance of particular seedlots can be used by forest managers to make planting decisions and assess economic benefits of planting genetically improved material. The results suggest that resistant stock planted at any location will have less fusiform rust infection than would unimproved stock. South. J. Appl. For. 17(4):188-192.

scholarly journals Fusiform Rust Trends in East Texas

1986 ◽  
Vol 10 (4) ◽  
pp. 215-216 ◽  
Author(s):  
Ellis V. Hunt ◽  
J. David Lenhart
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Pine Plantations ◽  
East Texas ◽  
Infection Rates ◽  
Fusiform Rust ◽  
Loblolly Pines ◽  
Pinus Taeda L

Abstract Four surveys of pine plantations in East Texas between 1969 and 1984 indicate that fusiform rust (Cronartium quercuum (Berk.) Miyabe ex Shirai f. sp. fusiforme) infection rates are increasing on slash pine (Pinus elliottii Engelm. var. elliottii) and either decreasing or about constant on loblolly pine (Pinus taeda L.). Currently, stem infections occur on about 1 in 2 slash pines and 1 in 14 loblolly pines. South. J. Appl. For. 10:215-216, Nov. 1986.

Projected gains in rotation-age volume and value from fusiform rust resistant slash and loblolly pines

1999 ◽  
Vol 29 (6) ◽  
pp. 737-742 ◽  
Author(s):  
Jeremy T Brawner ◽  
Douglas R Carter ◽  
Dudley A Huber ◽  
Timothy L White
Keyword(s):  
Loblolly Pine ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Planting Stock ◽  
Fusiform Rust ◽  
Marginal Value ◽  
Loblolly Pines ◽  
Rotation Age ◽  
The Difference ◽  
Pinus Taeda L

Midrotation data from large block plots of resistant and susceptible slash (Pinus elliottii Engelm.) and loblolly pine (Pinus taeda L.) were used in combination with the Georgia pine plantation simulator growth model to provide projected gains per hectare in volume and value generated by resistance to fusiform rust (Cronartium quercum (Berk.) Miyabe ex Shirai f.sp. fusiforme). The difference in the projected volume production between the resistant and susceptible planting stock of slash pine was larger than the difference between resistance levels in loblolly pine. The increases in projected volume and the reductions in percent infection of the resistant stock led to large differences in the value of the resistant and susceptible planting stock. At a 6% real discount rate, plantations of resistant slash pine were on average worth between 40.2 and 89.8% more than plantations of susceptible slash pine. Plantations of resistant loblolly were on average worth between 6.1 and 40.3% more than plantations of susceptible loblolly pine. However, the marginal value of rust resistance in loblolly was not significantly different from zero under the assumption that economic differences are only due to volume losses and not losses due to product degrade.

Fusiform Rust in Crosses Among Resistant and Susceptible Loblolly and Slash Pines

1989 ◽  
Vol 13 (4) ◽  
pp. 174-177 ◽  
Author(s):  
Earl R. Sluder
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Diallel Cross ◽  
Slash Pine ◽  
Family Selection ◽  
Fusiform Rust ◽  
Loblolly Pines ◽  
Progeny Tests ◽  
Pinus Taeda L ◽  
Half Diallel

Abstract Progenies from a half-diallel cross among six loblolly pines (Pinus taeda L.) and another among six slash pines (P. elliottii Engelm. var. elliottii) were field-tested in central Georgia for fusiform-rust (Cronartium quercuum [Berk.] Miyabe ex Shirai f. sp. fusiforme) resistance. Threeof each set of six parents were rated resistant (R) and three susceptible (S) to the fungus relative to check lots in previous progeny tests. For both species, relative susceptibility of the three types of progenies at age 5 years was R x R < R x S < S x S. The R x R and R x S progeniesin slash pine had considerably less infection than did the same types of progenies in loblolly pines. All S x S progenies were heavily infected. Heritability estimates for percentage infection and average galls per tree indicated that in these progenies, family selection should be based onpercentage infection for slash pine and galls per tree for loblolly pine. South. J. Appl. For. 13(4):174-177.

scholarly journals Comparison of Planted Loblolly and Slash Pine Performance in Southeast Texas

1993 ◽  
Vol 17 (1) ◽  
pp. 26-31 ◽  
Author(s):  
J. David Lenhart ◽  
Gary D. Kronrad ◽  
Michael S. Fountain
Keyword(s):  
Loblolly Pine ◽  
Tree Height ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Volume Index ◽  
Fusiform Rust ◽  
Tree Diameter ◽  
Stem Straightness ◽  
Southeast Texas ◽  
Total Tree

Abstract The performance of young (less than 10 yr) loblolly (Pinus taeda L.) and slash (Pinus elliottii Engelm.) pine trees was compared on planted sites in southeast Texas. Performance was compared for: total tree height; tree diameter; height to live tree crown; tree volume index,; incidenceof fusiform rust (Cronartium quercuum [Berk.] Miyabe ex Shirai f. sp. fusiforme); crookedness of stems; and survival rates. For these young trees, slash pine tended to perform better in southeast Texas than loblolly pine in total tree height, tree diameter, stem size, height to first livebranch and stem straightness. However, loblolly pine was less susceptible to fusiform rust than slash pine, and its mortality rate was lower than slash pine. However, based on the performance of these young plantations, a recommendation on the preferred pine species to plant in southeast Texasmight be premature. South. J. Appl. For. 17(1):26-31.

Estimating Fusiform Rust Losses in Five Southeast States

1986 ◽  
Vol 10 (4) ◽  
pp. 237-240 ◽  
Author(s):  
Robert L. Anderson ◽  
Joe P. McClure ◽  
Noel Cost ◽  
Robert J. Uhler
Keyword(s):  
Loblolly Pine ◽  
Forest Inventory ◽  
Slash Pine ◽  
Growth And Yield ◽  
Quality Loss ◽  
Forest Inventory And Analysis ◽  
Fusiform Rust ◽  
State Area

Abstract Annual losses to fusiform rust are estimated at over $35 million in the five States from Virginia to Florida. Losses were estimated by taking Forest Inventory and Analysis (FIA) data on fusiform rust through a series of growth and yield equations and sawtimber quality loss projections. The result is a system that estimates cordwood and sawtimber losses by state for loblolly and slash pine in natural and planted stands. Each time a state is resurveyed by FIA, a new estimate of loss can be made. This system applied to a 5-state area also shows that about 8.8 million acres of the 24 million acres of slash and loblolly pine have at least 10 percent of the trees infected. South. J. Appl. For. 10:237-240, Nov. 1986.

scholarly journals Fusiform Rust Trends in East Texas: 1969-1987

1988 ◽  
Vol 12 (4) ◽  
pp. 259-261 ◽  
Author(s):  
J. David Lenhart ◽  
W. Thomas McGrath ◽  
Terry L. Hackett
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Pine Plantations ◽  
East Texas ◽  
Infection Rates ◽  
Fusiform Rust ◽  
Cronartium Quercuum ◽  
Pinus Taeda L

Abstract Five surveys of pine plantations in East Texas over an 18-year period (1969-1987) indicated that fusiform rust (Cronartium quercuum [Berk.] Miyabe ex Shirai f. sp. fusiforme Birdsall and Snow) infection rates have increased to current levels of about 50% on slash pine (Pinus elliottii Engelm.) and are continuing to increase on loblolly pine (Pinus taeda L.) to 10-15% levels. South. J. Appl. For. 12(4):259-261.

Loblolly Pine Seed Sources Differ in Susceptibility to the Southern Pine Beetle in South Carolina

1992 ◽  
Vol 16 (4) ◽  
pp. 169-174 ◽  
Author(s):  
H. R. Powers ◽  
R. P. Belanger ◽  
W. D. Pepper ◽  
F. L. Hastings
Keyword(s):  
South Carolina ◽  
Disease Resistance ◽  
Loblolly Pine ◽  
Slash Pine ◽  
Southern Pine Beetle ◽  
Southern Pine ◽  
Fusiform Rust ◽  
Seed Sources ◽  
Pine Beetle ◽  
Stand Characteristics

Abstract In a planting near Aiken, SC, loblolly pine saplings from an eastern seed source were significantly more susceptible to the southern pine beetle (SPB) than were loblolly saplings from western seed sources. Two eastern sources of slash pine also resisted beetle attack. Study plots wereoriginally established to evaluate disease resistance and growth of fusiform rust resistant and susceptible seed lots. There was no relationship between stand characteristics or rust infection patterns and SPB damage. South. J. Appl. For. 16(4):169-174

scholarly journals An Economic Evaluation of Fusiform Rust Protection Research

2000 ◽  
Vol 24 (2) ◽  
pp. 77-85 ◽  
Author(s):  
Frederick W. Cubbage ◽  
John M. Pye ◽  
Thomas P. Holmes ◽  
John E. Wagner
Keyword(s):  
Economic Evaluation ◽  
Research And Development ◽  
Loblolly Pine ◽  
Genetic Resistance ◽  
Slash Pine ◽  
Fusiform Rust ◽  
Financial Benefits ◽  
Simulation Results ◽  
The Cost ◽  
Benefit Cost

Abstract Fusiform rust is a widespread and damaging disease of loblolly pine (P. taeda) and slash pine (P. elliottii) in the South. Research has identified families of these pines with improved genetic resistance to the disease, allowing production and planting of resistant seedlings in areas at risk. This study compared the cost of fusiform rust research to the simulated benefits of rust resistant seedlings in plantations that have been or are projected to be established Southwide between 1970 and 2020. Results showed that compounded fusiform rust research costs of $49 million in 1992 will return discounted benefits to plantation owners of between $l08 and $999 million in 1992, at a 4% real discount rate. The most probable targeting of rust resistant seedlings would provide estimated discounted benefits of fusiform rust protection of about $200 to $300 million in 1992, or annual discounted benefits of $40 to $60 million. This would generate benefit-cost ratios of about 4:1 to 6:1 for fusiform rust research. Currently anticipated improvements in resistance will not eliminate all physical and financial damages from the disease; simulation results indicate substantial financial benefits yet remain for additional research and development. South. J. Appl. For. 24(2):77-85.

Indirect selection and clonal propagation of loblolly pine seedlings enhance resistance to fusiform rust

1989 ◽  
Vol 19 (4) ◽  
pp. 534-537 ◽  
Author(s):  
G. S. Foster ◽  
R. L. Anderson
Keyword(s):  
Loblolly Pine ◽  
Rust Resistance ◽  
Clonal Propagation ◽  
Indirect Selection ◽  
Artificial Inoculation ◽  
Fusiform Rust ◽  
Rooted Cutting ◽  
Pine Seedlings ◽  
Susceptible Control ◽  
High Degree

A population of loblolly pine (Pinustaeda L.) seedlings without fusiform rust (Cronartiumquercuum (Berk.) Miyabe ex Shirai f.sp. fusiforme) galls was developed by controlled-cross matings of parent trees with known rust resistance, and subsequent screening of the seedling offspring through artificial inoculation. The seedlings without rust galls then entered a vegetative propagation system using rooted cuttings. A second round of rust testing by artificial inoculation, using a random sample of 20 clones from the program, revealed a high degree of rust resistance (4% galled) compared with that of seedlings from either a resistant control seedlot (50% galled) or a susceptible control seedlot (81% galled). This apparently high degree of rust resistance may be due to genetic effects, rooted cutting morphology, or both.

Sign in / Sign up

Export Citation Format

Share Document