Western White Research Articles

Relationship Between Attacks by the Mountain Pine Cone Beetle (Coleoptera: Scolytidae) to Clone and Cone Color in Western White Pine

Total cones produced by western white pine, Pinus monticola Douglas, and total number attacked by the mountain pine cone beetle ( Conophthorus ponderosae Hopkins = C. monticolae Hopkins) were counted during a 5-year study in the Sandpoint Seed Orchard, Sandpoint, Idaho. Cone production and level of beetle attack varied with clone, cone color class, and year. Certain western white pine clones were attacked at consistently higher rates than other clones. In years when cone production and percent cone attack were high, cone beetles showed preference for dark-colored over light-colored cones.

Conifer Cone Harvesting: An Experimental Approach

ABSTRACT THE objective of this study is to quantify various para-meters affecting the vibratory removal of the conifore cones. The three conifer species used in this experiment were (a) Ponderosa Pine, (b) Douglas Fir and (c) Western White Pine. The initial test was to determine pull and torsional forces required for cone detachment. The effects of various factors such as amplitude, direc-tion, duration and repetitions of vibration on cone removal and damage to the tree were studied. In order to isolate these factors, individual limbs from each of the three species were cut and vibrated by a laboratory shaker. The resulting data indicate the constraints pro-vided by the tree and the best approach to use in attemp-ting to harvest the cones by whole tree shaking.

Comparative Physiology of Eastern and Western White Pines: Oleoresin Composition and Viscosity

Comparative Physiology of Eastern and Western White Pines: Oleoresin Composition and Viscosity

Ultrastructure of tissue cultures of Pinus monticola infected by Cronartium ribicola. I. Prepenetration host changes

Tissue cultures derived from the cortex of Western White pine were inoculated with axenically grown cultures of the obligate parasite Cronartium ribicola. Ultrastructural observations have been made of uninfected host cells within the host-parasite interface as well as from zones 1–2 mm and 1–2 cm distal to the interface and have been compared with observations of rust-free pine tissue. Degenerative changes occurred in host cells several millimetres in advance of the fungus. The nature of these changes is discussed with reference to both natural senescence and deleterious action-at-a-distance responses produced by other plant pathogens. Tannin synthesis and its possible significance in diseased pine cells is examined.

Drought Crack on Western White Pine in Northern Idaho

Drought Crack on Western White Pine in Northern Idaho

A Lower Paleozoic Rheo-Ignimbrite from White Bay, Newfoundland

The Otter Cove and Ansteys Brook Members of the Natlins Cove Formation of western White Bay, Newfoundland are described and redefined. These members include bedded and chaotic tuffs, ignimbrites and pyro-turbidites, and a lava-like lithology shown to be a rheoignimbrite. The paleogeography and volcanic history of the area are reconstructed, and the rheo-ignimbrite is described and discussed. Comparisons are made with other examples.

Influence of Blister Rust on Inorganic Solute Concentrations in Western White Pine

Influence of Blister Rust on Inorganic Solute Concentrations in Western White Pine

Maize and the Mande Myth

This paper is an attempt to evaluate the evidence offered by the Mande myth and tribal traditions for the introduction into western Africa of the American maize plant at a date long before the birth of Columbus. The Mande have a myth in which maize travels from west to east down the Niger to Lake Debo near Timbuktu, on the "buckle of the Niger." This myth occurs among numerous tribes widely scattered in the western Sudan. Evidence from the tribal histories of migrations, traditions, maize names, and archaeological remains among the Akan, Ga, Egbo, Yoruba, and other Gold Coast tribes indicates that they obtained maize from the "buckle of the Niger" at a date long before the discovery of America by Columbus. Thus it appears that maize need not have come to western Africa with the Portuguese. In support of this argument, it is shown that the Portuguese themselves claim to have brought maize from Africa to Portugal before Columbus had discovered America. Next, evidence is presented that tends to refute another argument for Portuguese introduction of maize, one that can be summarized as follows: Many Negro names for white men centre on a p-t stem; this p-t occurs in the word"Portugal"; therefore, the p-t names for white men derive from the p-t stem, the Portuguese must have introduced maize. It is shown that the Negro was well acquainted with eastern whites, especially with Arabs, long before he met western whites. It is also shown that p-t stem names were used by the Negro to indicate items introduced by these eastern whites, such as spices, the gold weights of the Orient, and the banana. The p-t names for white men are discussed, and the derivation of such names from Oporto or Portuguese is rejected in favour of a much earlier root in the Sudan for whites from Asia Minor. It is argued that this American cereal, maize, was originally brought across the Atlantic by Arab sailors to the Muslim-dominated mouth of the Senegal River in the early centuries of the Almoravid hegemony. Maize then diffused along the caravan route, linking the mouth of the Senegal, through such centres as Timbuktu, Kano, Bornu, and Senna, to the Red Sea.

Resistance of Western White Pine to White-Pine weevil.

Resistance of Western White Pine to White-Pine weevil.

QUALITY AND AGRONOMIC CHARACTERISTICS OF WESTERN WHITE WHEAT VARIETIES GROWN IN SOUTH-WEST JAPAN

Two Western White wheat varieties, Gaines and Omar, were tested at Fukuyama, southwest Japan for quality and agronomic characteristics in evaluating them as cross parents for flour color improvement of Japanese wheat. Late heading was an obstacle, as the ripening period extends to the rainly season and grain quality is impaired.

Western White Pine Management Programs Realigned on Northern Rocky Mountain National Forests

Western White Pine Management Programs Realigned on Northern Rocky Mountain National Forests

Immunoelectrophoretic Analysis of Wheat Flour Albumins

Albumin preparations from four kinds of wheat flour (Durum, Manitoba No. 2, Western White and Norin No. 26) were analyzed by Immunoelectrophoresis. Seven to eleven components were detected for each preparation. They were classified and designated on the basis of the electrophoretic mobility (R) and the character of precipitin lines formed by antigen-antibody reactions.

CHEMOTAXONOMY AS AN AID IN DIFFERENTIATING WOOD OF EASTERN AND WESTERN WHITE PINE

Heartwoods from Pinus strobus (eastern white pine) and Pinus monticola (western white pine), which are difficult to distinguish anatomically, can be separated, with about 95% accuracy, by subjecting their acetone extracts to simple paper chromatography. Basically, this differentiation is possible because the relative proportions of certain flavanones vary in the two species, and when these are treated with the chromogenic spray, distinguishing colors are produced at different rates of speed. With P. strobus, the characteristic yellowish‐orange spot results from higher percentages of cryptostrobin and strobobanksin, while the pinkish‐red spot, typical of P. monticola extract, is due to a preponderance of pinocembrin.

Chemotaxonomy as an Aid in Differentiating Wood of Eastern and Western White Pine

Heartwoods from Pinus strobus (eastern white pine) and Pinus monticola (western white pine), which are difficult to distinguish anatomically, can be separated, with about 95% accuracy, by subjecting their acetone extracts to simple paper chromatography. Basically, this differentiation is possible because the relative proportions of certain flavanones vary in the two species, and when these are treated with the chromogenic spray, distinguishing colors are produced at different rates of speed. With P. strobus, the characteristic yellowish-orange spot results from higher percentages of cryptostrobin and strobobanksin, while the pinkish-red spot, typical of P. monticola extract, is due to a preponderance of pinocembrin.

Developments in Aerial Application of Antibiotics to Control Blister Rust on Western White Pine

Developments in Aerial Application of Antibiotics to Control Blister Rust on Western White Pine

Antibiotic Treatment of Western White Pine Infected with Blister Rust

Antibiotic Treatment of Western White Pine Infected with Blister Rust

Movement and Distribution of Radiophosphorus in Crowns of Healthy and Pole Blighted Western White Pines. (Pinus Monticola D. Don.)

Movement and Distribution of Radiophosphorus in Crowns of Healthy and Pole Blighted Western White Pines. (Pinus Monticola D. Don.)

Soil-Site Index Studies of Western White Pine in the Northern Rocky Mountain Region

Soil-Site Index Studies of Western White Pine in the Northern Rocky Mountain Region

Localized Ecotypic Variation in Western White Pine

Localized Ecotypic Variation in Western White Pine

DRUG TREATMENT PRESERVES WESTERN WHITE PINE

School Science and MathematicsVolume 57, Issue 8 p. 672-672 DRUG TREATMENT PRESERVES WESTERN WHITE PINE First published: November 1957 https://doi.org/10.1111/j.1949-8594.1957.tb07906.xAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume57, Issue8November 1957Pages 672-672 RelatedInformation