scholarly journals Evaluation of Biological and Biorational Control Tactics for Suppression of Nantucket Pine Tip Moth Damage in Virginia Pine Christmas Trees

2005 ◽  
Vol 98 (2) ◽  
pp. 409-414 ◽  
Author(s):  
Michael M. Philip ◽  
David B. Orr ◽  
Fred P. Hain
Keyword(s):  
Christmas Trees ◽  
Biorational Control ◽  
Nantucket Pine Tip Moth

scholarly journals Visualization of Chromatin in the Yeast Nucleus and Nucleolus Using Hyperosmotic Shock

2021 ◽  
Vol 22 (3) ◽  
pp. 1132
Author(s):  
Nicolas Thelen ◽  
Jean Defourny ◽  
Denis L. J. Lafontaine ◽  
Marc Thiry
Keyword(s):  
Osmotic Shock ◽  
Size Composition ◽  
Yeast Cells ◽  
Exponential Growth Phase ◽  
Cell Nuclei ◽  
Hyperosmotic Shock ◽  
Christmas Trees ◽  
Transmission Electron ◽  
Active Transcription ◽  
Decondensed Chromatin

Unlike in most eukaryotic cells, the genetic information of budding yeast in the exponential growth phase is only present in the form of decondensed chromatin, a configuration that does not allow its visualization in cell nuclei conventionally prepared for transmission electron microscopy. In this work, we studied the distribution of chromatin and its relationships to the nucleolus using different cytochemical and immunocytological approaches applied to yeast cells subjected to hyperosmotic shock. Our results show that osmotic shock induces the formation of heterochromatin patches in the nucleoplasm and intranucleolar regions of the yeast nucleus. In the nucleolus, we further revealed the presence of osmotic shock-resistant DNA in the fibrillar cords which, in places, take on a pinnate appearance reminiscent of ribosomal genes in active transcription as observed after molecular spreading (“Christmas trees”). We also identified chromatin-associated granules whose size, composition and behaviour after osmotic shock are reminiscent of that of mammalian perichromatin granules. Altogether, these data reveal that it is possible to visualize heterochromatin in yeast and suggest that the yeast nucleus displays a less-effective compartmentalized organization than that of mammals.

Cupressus arizonica (Arizona cypress).

2021 ◽  
Author(s):  
Sylvan Kaufman
Keyword(s):  
New World ◽  
Erosion Control ◽  
Economic Importance ◽  
Christmas Trees ◽  
Cupressus Arizonica ◽  
A Minor ◽  
Minor Extent

Abstract At present, in the New World, C. arizonica and its varieties are of low economic importance, but they are sometimes cut for fenceposts, fuelwood and lumber, and recently they have become popular as Christmas trees. By contrast, the Arizona cypress (C. arizonica var. arizonica) and the smooth cypress (C. arizonica var. glabra) are widespread in Europe and are used for landscaping, erosion control, windbreaks, and to a minor extent for lumber.

scholarly journals What Owners Expect From Their Woodlots

1985 ◽  
Vol 61 (2) ◽  
pp. 159-162 ◽  
Author(s):  
Alex Dickson
Keyword(s):  
New Brunswick ◽  
Cash Crop ◽  
Maple Syrup ◽  
Human Personality ◽  
Important Thing ◽  
Christmas Trees ◽  
Average Wood ◽  
Made In

There is no typical or average wood lot owner. Woodlot owners come from all walks of life and own woodlots for almost as many reasons as there are variations in the human personality. Some own woodlots for the primary purpose of producing some kind of cash crop: timber, Christmas trees, maple syrup, firewood, and so on. Others derive satisfaction from the nonconsumptive values of woodlot ownership, for example a scenic environment in which to hike, picnic, or meditate. The important thing to realize is that woodlot management has to address the expectations of the various owners if it is to stand a chance of being implemented. Findings made in the recent New Brunswick Private Woodlot Resources Study are discussed. Keywords: Woodlots, owner expectations, reasons for ownership, financial and nonfinancial goals.

Bionomics of the pine needle scale (Hemiptera: Diaspididae), an emerging pest in Christmas tree (Pinaceae) plantations in southern Québec, Canada

2018 ◽  
Vol 150 (5) ◽  
pp. 632-636 ◽  
Author(s):  
Jean-Frdéric Guay ◽  
Amy Bernier-Desmarais ◽  
Jean-François Doherty ◽  
Conrad Cloutier
Keyword(s):  
Life Cycle ◽  
Scale Insects ◽  
Tree Plantations ◽  
Christmas Tree ◽  
Pine Needle ◽  
Abies Fraseri ◽  
Fraser Fir ◽  
Christmas Trees ◽  
Significant Damage ◽  
The Status

AbstractThe pine needle scale, Chionaspis pinifoliae (Fitch) (Hemiptera: Diaspididae), has the status of an emerging pest in Christmas tree (Pinaceae) plantations in Québec, Canada. The scale is not known to cause any significant damage yet and is not generally monitored by growers. However, it can be an obstacle for exportation to Christmas tree markets where scale insects are strictly regulated. In this study, we describe its life cycle in Christmas tree plantations in southern Québec. We confirm the presence of both parthenogenetic and sexual forms of the scale on Fraser fir Abies fraseri (Pursh) Poiret (Pinaceae) grown as Christmas trees, and of parasitoid and Coccinellidae (Coleoptera) specialists that could contribute to its control.

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