scholarly journals Involvement of invasive eastern red cedar (Juniperus virginiana) in the expansion ofAmblyomma americanumin Oklahoma

2017 ◽  
Vol 42 (1) ◽  
pp. 178-183 ◽  
Author(s):  
Bruce H. Noden ◽  
Trisha Dubie
Keyword(s):  
Juniperus Virginiana ◽  
Eastern Red Cedar ◽  
Red Cedar

Dispersal of eastern red cedar (Juniperus virginiana) into pastures: an overview

1987 ◽  
Vol 65 (6) ◽  
pp. 1092-1095 ◽  
Author(s):  
Anthonie M. A. Holthuijzen ◽  
Terry L. Sharik ◽  
James D. Fraser
Keyword(s):  
Growing Season ◽  
Seed Banks ◽  
Physiological Adaptation ◽  
Juniperus Virginiana ◽  
Similar Distribution ◽  
Eastern Red Cedar ◽  
Red Cedar ◽  
Seed Sources ◽  
Seed Shadows ◽  
Recovered Material

Seed dispersal, predispersal and postdispersal seed predation, seed dormancy, and germination were followed for four cone-bearing eastern red cedar trees (Juniperus virginiana L.), a predominantly avian-dispersed plant species, in pastures in southwest Virginia from June 1981 through May 1982. Within 12 m from the source trees, 34.7% of the total cone crop was recovered. Recovered material consisted of unripe cones, ripe cones, parasitized cones, and pulpless seeds evacuated by birds, averaging 17.9, 11.6, 1.0, and 4.2%, respectively, of the cone crop. Predispersal avian predation of seeds accounted for 3.1% of the cone crop. After 1 year 0.9% of the cones remained on the trees. The remaining 61.3% of the cone crop was dispersed at least 12 m from the source trees. Less than 3% of the cone crop is likely to germinate within 12 m of the source trees, while about 25% is likely to germinate at greater distances. Red cedar seeds passed unharmed through the digestive tract of avian dispersers and showed greater total germination than manually depulped seeds. Red cedar seed banks were not found under a chronosequence of red cedar stands; seeds generally lost their viability within one growing season. Seed shadows decreased exponentially with distance from cone-bearing trees. A similar distribution function was reflected in the spatial distribution of red cedar cohorts colonizing pastures near source trees. The large cone crop, diverse avian disperser assemblage, physiological adaptation of red cedar to open, xeric sites, and availability of seed sources in fence rows contribute to the successful invasion of pastures by this species.

scholarly journals Postharvest Drying of Leyland Cypress, Eastern Red Cedar, and Fraser Fir Christmas Trees

HortScience ◽  
1995 ◽  
Vol 30 (7) ◽  
pp. 1427-1428 ◽  
Author(s):  
L. Eric Hinesley ◽  
Layne K. Snelling
Keyword(s):  
Laboratory Experiments ◽  
Juniperus Virginiana ◽  
Pressure Potential ◽  
Fraser Fir ◽  
Eastern Red Cedar ◽  
Red Cedar ◽  
Christmas Trees ◽  
Xylem Pressure Potential ◽  
Better Than

Postharvest drying of Leyland cypress [× Cupressocyparis leylandii (A.B. Jacks. & Dallim.)] branches was intermediate between eastern red cedar (Juniperus virginiana L.) and Fraser fir [Abies fraseri (Pursh) Poir.] in two laboratory experiments. Leyland cypress rehydrated without adverse effect until xylem pressure potential reached –4.0 to –5.0 MPa (shoot moisture content = 60% to 65%). For branches continuously maintained in water, Fraser fir and Leyland cypress kept equally well over 4 weeks of display, but Leyland cypress lasted longer than Fraser fir over 8 weeks. Postharvest keeping quality of Leyland cypress and Fraser fir was better than that of eastern red cedar.

An odor-reducing, low dust-forming, clumping cat litter produced from Eastern red cedar (Juniperus virginiana L.) wood fibers and biochar1

2020 ◽  
Vol 147 ◽  
pp. 112224 ◽  
Author(s):  
Steven F. Vaughn ◽  
Jill K. Winkler-Moser ◽  
Mark A. Berhow ◽  
Jeffrey A. Byars ◽  
Sean X. Liu ◽  
...  
Keyword(s):  
Juniperus Virginiana ◽  
Wood Fibers ◽  
Eastern Red Cedar ◽  
Red Cedar

scholarly journals Branch Dieback of Savin Juniper in Pennsylvania Caused by Diplodia mutila

Plant Disease ◽  
1997 ◽  
Vol 81 (1) ◽  
pp. 111-111 ◽  
Author(s):  
G. R. Stanosz ◽  
G. W. Moorman
Keyword(s):  
Juniperus Virginiana ◽  
Cultural Characteristics ◽  
Canker Disease ◽  
Eastern Red Cedar ◽  
Red Cedar ◽  
Pure Cultures ◽  
Branch Dieback ◽  
Juniperus Sabina

Branch dieback of savin juniper (Juniperus sabina L.) was observed on a tree in Dauphin County, PA, in May 1996. The symptomatic tree was in an ornamental planting that had been established approximately 10 years previously. Branches were cankered and girdled, causing yellowing and death of foliage beyond the cankers. Black pycnidia occurred in necrotic bark of cankers. Dark, two-celled conidia obtained from these pycnidia produced pure cultures of Diplodia mutila (Fr.:Fr.) Mont., the anamorph of Botryosphaeria stevensii Shoemaker. The fungus was identified based on pycnidial, conidial, and cultural characteristics, and comparison with known isolates provided by N. A. Tisserat (2). Pathogenicity of a single conidial isolate from Pennsylvania was tested in a greenhouse by wounding and inoculating twigs of potted eastern red cedar (Juniperus virginiana L.) with water agar plugs colonized by mycelium. Cankers formed and enlarged to girdle and kill the inoculated shoots, from which the pathogen was reisolated. No symptoms developed on, nor was the pathogen isolated from, control twigs. B. stevensii has been reported more frequently on angiosperms, such as apple (Malus Mill.) and oak (Quercus L.), than on gymnosperms. However, a canker disease caused by B. stevensii previously has been reported to affect J. scopulorum Sarg. and J. virginiana in Kansas, Missouri, and Iowa (1,2). References: (1) P. H. Flynn and M. L. Gleason. Plant Dis. 77:210, 1993. (2) N. A. Tisserat et al. Plant Dis. 72:699, 1988.

Development of wood decay in wound-initiated discolored wood of eastern red cedar

Holzforschung ◽  
2010 ◽  
Vol 64 (4) ◽  
Author(s):  
Walter C. Shortle ◽  
Kenneth R. Dudzik ◽  
Kevin T. Smith
Keyword(s):  
Wood Decay ◽  
Decay Resistance ◽  
Wood Products ◽  
Common Finding ◽  
Alternative View ◽  
Total Phenol Content ◽  
Juniperus Virginiana ◽  
Eastern Red Cedar ◽  
Red Cedar ◽  
Starting Point

Abstract Logs of eastern red cedar, Juniperus virginiana L., with well-developed bands of light-colored wood (“included sapwood”) within heartwood can be unsuitable for sawn wood products. This finding is in contrast to published information that the “included sapwood” is (1) a heartwood anomaly rather than sapwood and (2) its occurrence is not a reason to exclude this type of wood from commercial use. The alternative view presented here is that “included sapwood” is wound-initiated discolored wood which is the starting point for wood decay in living trees and which has adversely altered wood properties before the development of decay symptoms. Our study of the patterns of discoloration and decay, electrical resistance properties, elemental analysis, wood acidity, solubility in dilute NaOH, total phenol content, and tests of wood decay resistance indicated that the so-called included sapwood was discolored wood. This light-colored discolored wood had no greater decay resistance than sapwood, a common finding in other tree species in which “included sapwood” is found. Half the sample disks sent to our laboratory had symptomatic decay within the bands of light-colored discolored wood bounded by a phenol-enriched protective layer on the bark side and phenol-enriched heartwood on the pith side of the band. This ring-rot, even in its pre-symptomatic stage, can cause problems during processing for sawn wood products. Therefore, logs with well-developed bands of light-colored discolored wood should be considered high-risk material for some products, although they could be useful for others.

scholarly journals Some Properties of Eastern Red Cedar (Juniperus Virginiana L.) Particleboard Panels Made Using Modified Starch as Binder

2020 ◽  
Vol 71 (4) ◽  
pp. 371-377
Author(s):  
Onur Ulker ◽  
Salim Hiziroglu
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Modulus Of Rupture ◽  
Juniperus Virginiana ◽  
Modified Starch ◽  
Thickness Swelling ◽  
Eastern Red Cedar ◽  
Red Cedar

The objective of this study was to evaluate physical and mechanical properties of experimental panels manufactured from eastern red cedar (Juniperus virginiana L.) using modified starch as binder. Modulus of elasticity (MOE), modulus of rupture (MOR), internal bond strength (IB), hardness and dimensional stability in the form of thickness swelling and water absorption in addition to surface quality of the samples were tested. Panels were manufactured at three density levels, which are 0.60 g/cm3, 0.70 g/cm3 and 0.80 g/cm3. The highest MOE, MOR and IB values for the samples having 0.80 g/cm3 density were determined as 2207.16 MPa, 15.17 MPa and 0.87 MPa, respectively. Thickness swelling values of the samples soaked in water for 2 h ranged from 15.38 % to 23.23 %. Micrographs taken on the samples using scanning electron microscope revealed that starch was uniformly distributed within the particles. Based on the findings in this study, it appears that eastern red cedar would have a potential as a raw material to manufacture particleboard panel using modifi ed starch as green adhesive with accepted physical and mechanical properties.

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