Effect of Bacillus strains on growth of pine (Pinus contorta Dougl.), spruce (Picea glauca Voss.), and Douglas-fir (Pseudotsuga menziesii (Mirb. Franco)

1991 ◽  
pp. 366-366 ◽  
Author(s):  
C. P. Chanway ◽  
R. A. Radley ◽  
F. B. Holl ◽  
P. E. Axelrood
Keyword(s):  
Pseudotsuga Menziesii ◽  
Picea Glauca ◽  
Pinus Contorta ◽  
Douglas Fir ◽  
Bacillus Strains

PINE OIL PROTECTS LIVING TREES FROM ATTACK BY THREE BARK BEETLE SPECIES, DENDROCTONUS SPP. (COLEOPTERA: SCOLYTIDAE)

1981 ◽  
Vol 113 (4) ◽  
pp. 337-340 ◽  
Author(s):  
W. W. Nijholt ◽  
L. H. McMullen ◽  
L. Safranyik
Keyword(s):  
Pseudotsuga Menziesii ◽  
Picea Glauca ◽  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Douglas Fir ◽  
Dendroctonus Pseudotsugae ◽  
Pine Oil ◽  
Spruce Beetle ◽  
Pine Beetle

AbstractPine oil, a by-product of sulphate wood pulping, protected pheromone-baited, living Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), lodgepole pine (Pinus contorta Dougl.), and spruce (Picea glauca (Moench) Voss - P. engelmannii Parry hybrids) from attack by Douglas-fir beetle (Dendroctonus pseudotsugae Hopk.), mountain pine beetle (D. ponderosa Hopk.), and spruce beetle (D. rufipennis (Kirby)), respectively. Pine oil also protected surrounding trees and reduced attack incidence on Douglas-fir, lodgepole pine, and spruce within at least a 10 m radius. α-Terpineol, one of the constituents of the pine oil mixture, was less effective.

Hybrid biovars of Agrobacterium species isolated from conifer roots

1991 ◽  
Vol 37 (1) ◽  
pp. 34-41 ◽  
Author(s):  
C. R. Bell ◽  
W. D. Ramey
Keyword(s):  
Pseudotsuga Menziesii ◽  
Picea Glauca ◽  
Pinus Contorta ◽  
Heterotrophic Bacteria ◽  
Principal Component ◽  
Tsuga Heterophylla ◽  
Thuja Plicata ◽  
Discrete Groups ◽  
Red Cedar ◽  
Cluster 2

A total of 377 heterotrophic bacteria were isolated on nonselective medium from the rhizoplanes of five species of conifer. The species were western hemlock (Tsuga heterophylla), Douglas-fir (Pseudotsuga menziesii), lodgepole pine (Pinus contorta), white spruce (Picea glauca), and western red cedar (Thuja plicata). Twenty-eight strains from this population were identified as presumptive agrobacteria. All proved nontumourigenic. Principal-component analysis indicated that the strains, which had clustered into two discrete groups, had intermediate biovar characteristics. Cluster 1 was predominately biovar 3/2 in character, cluster 2 was predominately biovar 2/3. All the presumptive agrobacteria were distributed randomly with respect to the tree species. This study demonstrates that agrobacteria, although atypical, do occur in forest soils and attests to the ubiquity of the genus in soil. Key words: Agrobacterium, biovars, crown gall, conifers.

scholarly journals Vigilantreg; herbicide for control of two wilding conifer species contorta pine and Douglas fir

2004 ◽  
Vol 57 ◽  
pp. 94-97
Author(s):  
M. Newfield ◽  
B.G. Ward
Keyword(s):  
Pseudotsuga Menziesii ◽  
Death Rate ◽  
Pinus Contorta ◽  
Douglas Fir ◽  
Conifer Species ◽  
Leaf Distortion

Wilding conifers are usually killed without herbicide by severing the stem below the lowest green needles This is difficult for example when multistemmed trees are growing on unstable or rocky substrates Under such circumstances a picloram gel formulation (Vigilantreg; herbicide gel) was applied to freshly cut surfaces of stumps of contorta pine (Pinus contorta) and Douglas fir (Pseudotsuga menziesii) Stumps were pruned so that some green needles remained on the stump below the cut Treatments were applied in May 2002 After 6 months many herbicidetreated plants showed leaf distortion and yellowing After 18 months 97 of the 75 herbicidetreated contorta pine plants were dead compared with only 13 (n30) of those receiving no herbicide The herbicide killed 100 of the 15 treated Douglas fir plants compared with 3 death rate for the 15 receiving no herbicide

DISTRIBUTION AND IMPACT OF LEPTOGLOSSUS OCCIDENTALS HEIDEMANN (HEMIPTERA: COREIDAE) IN SEED ORCHARDS IN BRITISH COLUMBIA

1996 ◽  
Vol 128 (6) ◽  
pp. 1065-1076 ◽  
Author(s):  
Suzie E. Blatt ◽  
John H. Borden
Keyword(s):  
British Columbia ◽  
Seed Production ◽  
Pseudotsuga Menziesii ◽  
Pinus Contorta ◽  
Lodgepole Pine ◽  
Douglas Fir ◽  
Seed Orchards ◽  
Threshold Levels ◽  
Management Measures ◽  
Leptoglossus Occidentalis

AbstractLeptoglossus occidentalis Heidemann (Hemiptera: Coreidae) is considered to be an important cone and seed pest in seed orchards in British Columbia; however, no impact studies have been done in Canada. Surveys to determine the distribution of L. occidentalis were conducted over a 3-year period in three coastal seed orchards of Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco, and over a 2-year period in two seed orchards of lodgepole pine, Pinus contorta var. latifolia Engelmann. Leptoglossus occidentalis was found to distribute itself in patches, coinciding with a clonal preference. Seed losses were assessed for 2 years in the coastal Douglas-fir orchards and for 1 year in one lodgepole pine orchard. The percentages of partially filled seed that could have been caused by feeding of L. occidentalis or by a number of other factors were < 5% in coastal Douglas-fir for both 1992 and 1993 and ~14% in lodgepole pine in 1993. Apparently because populations of L. occidentalis were low, there was no correlation between the percentage of partially filled seed and number of insects per tree. Except in unusual circumstances, management measures in Canada are judged not to be necessary as populations of L. occidentalis are consistently below the calculated threshold levels required to cause ≥5% loss in seed production.

Planting stock performance: Site and RGP effects

1995 ◽  
Vol 71 (6) ◽  
pp. 739-742 ◽  
Author(s):  
David G. Simpson ◽  
Alan Vyse
Keyword(s):  
Root Growth ◽  
Picea Glauca ◽  
Pinus Contorta ◽  
Lodgepole Pine ◽  
Field Performance ◽  
Douglas Fir ◽  
Growth Potential ◽  
Root Growth Potential ◽  
South Central ◽  
Interior Spruce

Douglas-fir [Pseudotsuga menziesii var glauca (Beissn.) Franco], interior spruce [Picea glauca Moench (Voss), Picea engelmannii (Parry) and their naturally occurring hybrids] and lodge-pole pine (Pinus contorta Dougl.) seedlings were planted on several forest sites in south central British Columbia. At planting, root growth potential (number of newly elongated roots longer than 10 mm per seedling) was determined. Trees were assessed for survival and height for at least five years. Survival of Douglas-fir and growth of all three species was affected by planting site, probably reflecting moisture and growing season temperature differences among sites. High (> 70%) survival, but not total height or mean annual relative growth rate was associated with root growth potential levels greater than 10 new roots per seedling in interior spruce and lodgepole pine. Survival and growth of Douglas-fir were not related to root growth potential. Fertilization of interior spruce seedlings at planting decreased survival 18% over seven growing seasons, and did not affect growth of surviving seedlings. Key words: reforestation, root growth potential, seedling quality, Douglas-fir, interior spruce, lodgepole pine, field performance

SUPPLEMENTARY LIGHTING AND CO2 ENRICHMENT FOR ACCELERATED GROWTH OF SELECTED WOODY ORNAMENTAL SEEDLINGS AND ROOTED CUTTINGS

1982 ◽  
Vol 62 (3) ◽  
pp. 703-707 ◽  
Author(s):  
W. C. LIN ◽  
J. M. MOLNAR
Keyword(s):  
Pseudotsuga Menziesii ◽  
Picea Glauca ◽  
Co2 Enrichment ◽  
White Spruce ◽  
Douglas Fir ◽  
Light Sources ◽  
Ilex Aquifolium ◽  
English Holly ◽  
Accelerated Growth ◽  
Supplementary Lighting

Daily 16-h (0400–2000 h) supplementary lighting with high-pressure sodium (HPS) lamps at 45 μE∙m2∙sec−1 increased growth of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), white spruce (Picea glauca (Moench) Voss), crape-myrtle (Lagerstroemia indica L.), and seven cultivars of English holly (Ilex aquifolium L.). Enrichment of greenhouse atmosphere with CO2 to 1000–1300 ppm increased growth of four cultivars of English holly. In comparing two different light sources in CO2-enriched greenhouses, low-pressure sodium (LPS) lamps at 42 μE∙m−2∙sec−1 were found as effective as HPS in increasing growth of white spruce, crape-myrtle, and five cultivars of English holly, but not so effective in Douglas-fir and three cultivars of English holly.

The Biology of Adelges cooleyi (Gill.) (Homoptera: Phylloxeridae)

1959 ◽  
Vol 91 (10) ◽  
pp. 601-617 ◽  
Author(s):  
Margaret E. P. Gumming
Keyword(s):  
North America ◽  
Pseudotsuga Menziesii ◽  
Tree Species ◽  
Picea Glauca ◽  
Douglas Fir ◽  
Alternate Host ◽  
Shade Tree ◽  
Engelmann Spruce ◽  
Shelter Belt ◽  
Adelges Cooleyi

Adelges cooleyi (Gill.) causes galls on spruce in the forests and on shelter-belt and shade-tree plantings in Alberta. The alternate host is Douglas fir, on which the injury is less conspicuous. The tree species affected are white spruce, Picea glauca (Moench) Voss, Engelmann spruce, P. engelmanni Parry, and blue Douglas fir, Pseudotsuga menziesii (Mirb.) Franco. A. cooleyi is indigenous to North America.

Pezizella chapmanii n.sp., a discomycete associated with bark beetle galleries in western conifers

1977 ◽  
Vol 55 (8) ◽  
pp. 888-891 ◽  
Author(s):  
H. S. Whitney ◽  
A. Funk
Keyword(s):  
Pseudotsuga Menziesii ◽  
Bark Beetle ◽  
Picea Glauca ◽  
Bark Beetles ◽  
Pinus Contorta ◽  
Western Canada ◽  
Agar Culture ◽  
Dendroctonus Rufipennis ◽  
Conidial State

Pezizella chapmanii n.sp. (Helotiales) is described from apothecia found in the galleries of various bark beetles in conifers of western Canada; viz., Dendroctonus rufipennis Kirby galleries in Picea glauca (Moench) Voss; D. ponderosae Hopkins galleries in Pinus contorta var. latifolia Engelmann and in P. ponderosa Laws.; D. murrayanae Hopkins galleries in P. contorta var. latifolia; and D. pseudotsugae Hopkins galleries in Pseudotsuga menziesii (Mirb.) Franco. In agar culture, a prominent Malbranchea conidial state is produced.

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