Parasites of Neodiprion pratti banksianae Rohwer in Northern Ontario

1960 ◽  
Vol 92 (9) ◽  
pp. 653-658 ◽  
Author(s):  
K. J. Griffiths
Keyword(s):  
Jack Pine ◽  
The Other ◽  
Lake Huron ◽  
Northern Ontario ◽  
Low Level ◽  
Pine Sawfly ◽  
The North ◽  
One Year

Ourbreaks of the jack-pine sawfly, Neodiprion pratti banksianae Rohwer, occur in northern Ontario at irregular intervals. Two independent outbreaks within 50 miles of each other – one on Great Cloche Island (McGugan et al., 1952) which lies in the North Channel of Lake Huron between Manitoulin Island and the mainland, and the other near Nairn Centre, approximately 30 miles west of Sudbury, Ontario – offered an opportunity to study the parasitism of this important defoliator. In 1954, when the study was started, heavy defoliation had been reported for several years in the Great Cloche outbreak, and light defoliation had occurred for one year in the Nairn Centre outbreak. Populations decreased in the Great Cloche area but remained relatively constant at a low level in the Nairn Centre area during 1955 and 1956, when the work was completed.

scholarly journals Results of an Aerial Spraying Operation Against the Swaine Jack Pine Sawfly, Neodiprion swainei Middleton, in Quebec utilizing the Insecticide Phosphamidon

1968 ◽  
Vol 44 (5) ◽  
pp. 14-20 ◽  
Author(s):  
J. M. McLeod
Keyword(s):  
Jack Pine ◽  
Pine Forest ◽  
Pine Sawfly ◽  
Aerial Spraying ◽  
One Year

In August 1965, 135,000 acres of jack pine forest in the St. Maurice Valley, Quebec, were sprayed with Phosphamidon for control of an outbreak of the Swaine jack pine sawfly, Neodiprion swainei Middleton. Applied by spray planes at a rate of 0.2 gallon per acre containing ¼ pounds of active insecticide material, it resulted in 99% mortality of the sawfly, and the threat of defoliation subsided. Phosphamidon applied at [Formula: see text] lb. per acre in a subsidiary test was almost as effective. One year after treatment, the sawfly population remained suppressed in the spray area, with no immediate prospect of resurgence. The treatment did not adversely affect the balance between the sawfly and its parasites, nor cause long-term instability in populations of other insects, birds and mammals living in the forest.

Polymorphic site index curves for jack pine in Northern Ontario

2001 ◽  
Vol 77 (1) ◽  
pp. 141-150 ◽  
Author(s):  
Willard H. Carmean ◽  
G. Hazenberg ◽  
G. P. Niznowski
Keyword(s):  
Analysis Data ◽  
Site Index ◽  
The United States ◽  
Jack Pine ◽  
Height Growth ◽  
Growth Patterns ◽  
Site Quality ◽  
Northern Ontario ◽  
Breast Height ◽  
The North

Stem-analysis data from dominant and codominant trees were collected from 383 plots located in fully stocked, even-aged, undisturbed mature jack pine stands. Separate site index curves were independently formulated for four regions of northern Ontario using the Newnham constrained nonlinear regression model; these formulations were used for comparing regional site index curves at three levels of site index (10 m, 15 m and 20 m).Comparisons showed that no significant differences existed between the four regional curves as well as with previously published site index curves for the North Central Region. Each of the four regions had similar polymorphic height-growth patterns; therefore, data for the four regions were combined and a single formulation was used to develop a polymorphic set of site index curves for all of northern Ontario. We found that poor sites in each region had almost linear height growth up to 100 years breast-height age, but for each region height growth became more curvilinear with increasing site index. The recommended site index curves for northern Ontario are based on a formulation using only data from plots 100 years and less but this formulation was not significantly different from a formulation using only data from plots 80 years and less, or a formulation that included all data from plots older than 100 years breast-height age.Comparisons were made between our northern Ontario curves and other jack pine site index curves for Ontario as well as curves for other areas of Canada and the United States. These comparisons generally showed considerable older age differences. Reasons for these differences are uncertain but could be due to differences in the amount and kind of data used for these other curves, could be due to differences in analytical methods, or could be due to regional differences in climate, soil and topography. Key words: site quality evaluation, polymorphic height growth, regional site index curves, site index prediction equations, comparisons among site index curves.

New contribution to the survey of the theory of the acrotony on the branch of one year grapevine: I - Investigation in the Tunisian vineyard

OENO One ◽  
2000 ◽  
Vol 34 (3) ◽  
pp. 121
Author(s):  
Béchir Ezzili ◽  
M. Bejaoui
Keyword(s):  
Apical Part ◽  
The Other ◽  
North African ◽  
The North ◽  
Result Show ◽  
The Difference ◽  
One Year ◽  
The One ◽  
New Hypothesis ◽  
Test Result

<p style="text-align: justify;">Research in the conduct mode of grapevines other than the north African goblet incited us to make an investigation on the no bursting on table vine canes and to study if the vestigial dormancy is equivalent to acrotony phenomenon. Results of this survey clearly show that this phenomenon varies from one year to the other and that there is a negative interrelationship between the percentage of buds no bursted and the diameter of the basis of the cane on the one hand and of the top on the other hand. The difference in diameters of the basis and apical part is weakly correlated with the percentage of buds no bursted. As a result we concluded that at the level of the cane, the percentage of buds no bursted doesn't only depend on the diameter of the cane but also on the fixing of this one on the carrier axis. The bibliographic survey puts in exergue the low temperature role. We tried to dissociate the acrotony phenomenon and the vestigial dormancy. Test result show that the long cane fixing at the temperature of 4°C during 10 days removes partially or completely the vestigial dormancy but the phenomenon of the acrotony persists. We examined the qualitative answers of the investigation. In Tunisia, on long canes of Muscatel of Italy, a certain percentage of one year old presents both the acrotony (80 p. cent) and the basitony phenomena (8 p. cent) in 1995. The discussion of results of the investigation allowed us to give out a new hypothesis of work concerning the phenomenon which we will to verify.</p>

A Checking Process for Life Assurance Reserves

1934 ◽  
Vol 4 (03) ◽  
pp. 163-177
Author(s):  
E. Olifiers
Keyword(s):  
North American ◽  
The Other ◽  
Life Assurance ◽  
The North ◽  
Gain And Loss ◽  
To Come ◽  
One Year ◽  
The One

The object of this paper is to draw attention to a process of checking the accuracy of the valuation results of any financial year from the preceding year's valuation results (the attained ages as at valuation date increasing by one year) by means of the elements which connect both valuations. These elements are the interest required to maintain the reserves, the net premiums, the reserves of the policies coming in and going out during the financial year, and the expected death strain. In the appendix to this paper the checking process has been applied to the revenue account for the year ending 31st December, 1921, given in Appendix B of Mr. C. Carpmael's paper in J.S.S. Vol. II, No. 2. The determination of the profit or loss from each source has been made on two different assumptions—namely, the one adopted by Mr. Carpmael, that the income and outgo are uniformly distributed over the year allowing half-a-year's interest at valuation rate and the other adopted in the North American gain and loss exhibit of the convention edition by which no allowance is made for half-a-year's interest for the two cases in which the policies are assumed to come in and go out at the beginning of the valuation year as done by Mr. Carpmael in his paper, and in the middle of the valuation year.

Analysis and modelling of cohort life tables of jack pine seed cones

1994 ◽  
Vol 24 (8) ◽  
pp. 1579-1592 ◽  
Author(s):  
Peter De Groot ◽  
Richard A. Fleming
Keyword(s):  
Mortality Rate ◽  
Jack Pine ◽  
Life Tables ◽  
Red Pine ◽  
Northern Ontario ◽  
The North ◽  
Pine Cone ◽  
Seed Cone ◽  
Jack Pine Budworm ◽  
Specific Mortality

Life tables for jack pine (Pinusbanksiana Lamb.) seed cones were constructed for cohorts at three sites in northern Ontario from 1985–1987 to determine the causes and temporal sequence of mortality. Seed cone abortion and feeding by the red squirrel, Tamiasciurushudsonicus (Erxleben), accounted for 65–75% of mortality. Insects killed about 4% of the total cone crop. Losses from the jack pine budworm, Choristoneurapinuspinus Freeman, the webbing coneworm, Dioryctriadisclusa Heinrich, and the red pine cone borer, Eucosmamonitorana Heinrich, combined, accounted for about 1%, while the cone resin midge, Asynaptahopkinsi Felt, and the red pine cone beetle, Conophthorusresinosae Hopkins, each killed about 1%. Three models, linear-exponential, Gompertz, and Weibull, were examined to describe seed cone survivorship curves, of which the Weibull generally gave concise descriptions and fitted very well. Significantly different patterns of cone survival occurred at different sites during the same period, and at the same site over different periods. The age-specific mortality rate increased with age most slowly in the bottom third of the tree's crown. There were significant differences in the age-specific mortality rate among the north, south, east, and west aspects in the same cohort, but there was no consistent pattern among cohorts, or between trees within a cohort.

The Peoples of Northern Russia Through the Eyes of Russian Writer and Ethnographer S. V. Maksimov

2016 ◽  
Vol 25 (1) ◽  
pp. 26-46
Author(s):  
Natalya Gramatchikova
Keyword(s):  
Well Being ◽  
Scientific Discourse ◽  
Spoken Word ◽  
The Other ◽  
Colonial Discourse ◽  
The North ◽  
Ethnographic Fiction ◽  
One Year ◽  
Northern Russia ◽  
The Masses

Mid-nineteenth-century Russian ethnography used fiction, artistry and education to enlighten the masses. Maksimov’s One Year in the North became one of the first examples of this new style of ethnography. Maksimov constructs ‘cultural masks’ regarding northern people (Samoyeds, Lapps, Karels, Zyrians). His impressions are developed out of long traditions and personal characterisations, such as: ‘little brothers’, blacksmiths, tricksters, ‘friends of deer and dogs’. The most interesting positions on his ‘evolutionary ladder’ are the first and the last, which belong to the Samoyeds and the Zyrians. Samoyeds find themselves partly outside the human space, but they are most diverse in the aspect of artistry. Zyrians, on the other hand, constitute a concern to their well-being. Maksimov’s biases are typical for this period of ethnographic development. Although Maksimov appreciates the spoken word, his colonial discourse replaced it by repulsion for Finno- Ugric languages. Artistry in the text of ‘ethnographic fiction’ enriches scientific discourse.

scholarly journals LITTORAL PROCESSES IN CAMPELLO COASTS

1982 ◽  
Vol 1 (18) ◽  
pp. 62
Author(s):  
J.J. Diez ◽  
M. Arenillas
Keyword(s):  
Seasonal Changes ◽  
Littoral Zone ◽  
Wind Wave ◽  
Present Situation ◽  
The Other ◽  
Mineralogical Analysis ◽  
The North ◽  
One Year

The coasts of Campello (fig. 1), just at the North of Alicante, have undergone important erosions in the last few years. A study has been developed for over one year to separate seasonal and permanent variations of the shoreline. The geomorphology and the recent generation of these coasts have "been established and the study and wind wave regimes have heen defined to evaluate the littoral transports, particularly the longshore ones. The seasonal transverse 1 profiling nay show the seasonal changes in the littoral zone and the sieve and mineralogical analysis of the different samples of +he beaches have completed the data for the discussion. Taking into account other studies of the authors in other parts of the East and Southeast coasts of Spain, an hypothesis on the littoral processes has been established, separating the seasonal and the permanent and degradative consequences. Some recommendations to keep at least the present situation of the beaches and to protect the other stretches of the shore are presented as final conclusions.

From Scarcity to Abundance: Achieving Quality-Assured Mass Higher Education

2011 ◽  
Vol 15 (2) ◽  
Author(s):  
Peter P. Smith
Keyword(s):  
Higher Education ◽  
Knowledge Economy ◽  
Good Practice ◽  
The United States ◽  
The Other ◽  
Secondary System ◽  
Mass Higher Education ◽  
Post Secondary ◽  
One Year ◽  
The One

The United States is in a bind. On the one hand, we need millions of additional citizens with at least one year of successful post-secondary experience to adapt to the knowledge economy. Both the Gates and Lumina Foundations, and our President, have championed this goal in different ways. On the other hand, we have a post-secondary system that is trapped between rising costs and stagnant effectiveness, seemingly unable to respond effectively to this challenge. This paper analyzes several aspects of this problem, describes changes in the society that create the basis for solutions, and offers several examples from Kaplan University of emerging practice that suggests what good practice might look like in a world where quality-assured mass higher education is the norm.

Sphagnum mosses (Sphagnaceae, Bryophyta) of mires Chefandzar and Masota in North Ossetia (Caucasus)

2018 ◽  
Vol 52 (2) ◽  
pp. 455-462 ◽  
Author(s):  
G. Ya. Doroshina ◽  
I. A. Nikolajev
Keyword(s):  
Plant Communities ◽  
The Other ◽  
North Caucasus ◽  
Sphagnum Mosses ◽  
Greater Caucasus ◽  
The North ◽  
First Time ◽  
North Ossetia

Sphagnum mires on the Greater Caucasus are rare, characterized by the presence of relict plant communities of glacial age and are in a stage of degradation. The study of Sphagnum of Chefandzar and Masota mires is carried out for the first time. Seven species of Sphagnum are recorded. Their distribution and frequency within the North Caucasus are analyzed. Sphagnum contortum, S. platyphyllum, S. russowii, S. squarrosum are recorded for the first time for the study area and for the flora of North Ossetia. The other mosses found in the study area are listed.

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