Régénération après coupes mécanisées et conventionnelles : Côte- Nord du Québec

1977 ◽  
Vol 53 (6) ◽  
pp. 341-347 ◽  
Author(s):  
Jean-Louis Boivin
Keyword(s):  
Significant Influence ◽  
Forest Type ◽  
The Other ◽  
Balsam Fir ◽  
White Birch ◽  
Cutting Method ◽  
North Shore ◽  
The North ◽  
Number Of Stems ◽  
Regeneration Study

A regeneration study has been carried out during the summer 1976 in the lake Pipmuacan watershed on the north shore of Quebec.This study aimed to compare the effects, on the regeneration, as well preestablished as established after cutting, of two cutting methods namely with tree harvester of the Koehring type or the conventional method which is partly mechanized.From the analysis carried out in this study, one may conclude to a good regeneration, well distributed over cutting areas, of balsam fir and spruce, either with a cutting method or with the other; this regeneration is not significantly different if the number of stems of all species is considered.Nevertheless, low distribution of balsam fir and spruce following conventional cutting in the spruce balsam forest type may result in large openings in the future mature stand.Among the factors considered, those which have a significant influence on the establishment of spruce are the original forest type and exposure while establishment of balsam fir is influenced by topography and drainage and finally exposition, cutting method and original forest type influence the regeneration of white birch. Nevertheless, those factors are not the most determinant according to their low correlation coefficient.

scholarly journals An Operational Evaluation of 3 Methoprene Larvicide Formulations for Use Against Mosquitoes in Catch Basins

2018 ◽  
Vol 12 ◽  
pp. 117863021876053 ◽  
Author(s):  
Justin E Harbison ◽  
Amy B Runde ◽  
Marlon Henry ◽  
Bridget Hulsebosch ◽  
Alka Meresh ◽  
...  
Keyword(s):  
Cook County ◽  
The Other ◽  
Storm Water ◽  
Effective Control ◽  
Control Effectiveness ◽  
North Shore ◽  
The North ◽  
Control Failure ◽  
Degree Of Control ◽  
Catch Basins

Effectiveness in controlling mosquitoes in storm water catch basins in the North Shore Mosquito Abatement District (northeastern Cook County, Illinois) was determined for 3 formulations of methoprene-based larvicides (Altosid XR 150-day Briquets, Altosid 30-day Pellets, Altosid 30-day Granules) in 2017 using a pass/fail evaluation criterion, in which emergence of a single adult from pupae collected from the basin constituted a control failure. Over the course of the 16-week study, basins receiving the 150-day briquets were treated once and basins receiving the pellet and granular formulations were treated every 4 weeks, with the first treatment occurring during the last week of May. Untreated basins were also observed for comparison with the treated basins. Over the course of the study, adult mosquitoes emerged from pupae collected in 94.2% of the untreated basins that contained pupae. All of the formulations evaluated in the study demonstrated some degree of control compared with the untreated basins, with pupae successfully emerging as adults in 64.6%, 55.5%, and 21.8% of samples from 150-day briquet, 30-day tablet, and 30-day pellet–treated basins that contained pupae, respectively. Pellets reapplied every 28 days provided significantly more effective control than the other formulations. The simple pass/fail criterion for evaluating control effectiveness proved to be a useful procedure for comparing effectiveness to untreated basins and among treatments.

COLEOPTERA OF THE NORTH SHORE OF THE GULF OF THE ST. LAWRENCE

1930 ◽  
Vol 62 (11) ◽  
pp. 239-246
Author(s):  
W. J. Brown
Keyword(s):  
The Other ◽  
The Third ◽  
North Shore ◽  
The North ◽  
Basal Margin ◽  
The One

Length 2.3-2.4 mm. ; width 1.1 mm. Elongate, suboval, moderately convex, fulvo-pubescent. Piceous with distinct aeneous lustre; each elytron with two yellow spots; the one as long as wide, including hunerus and basal margin and extending inwardly to the third interval; the other elongate oval and slightly oblique, extending from apical third to a point near apex.

Dynamique de la sapinière à bouleau jaune de l'est après une épidémie de tordeuse des bourgeons de l'épinette

1999 ◽  
Vol 75 (3) ◽  
pp. 515-534 ◽  
Author(s):  
Pierre Pominville ◽  
Stéphane Déry ◽  
Louis Bélanger
Keyword(s):  
Choristoneura Fumiferana ◽  
Abies Balsamea ◽  
Spruce Budworm ◽  
The Other ◽  
Balsam Fir ◽  
Betula Alleghaniensis ◽  
White Birch ◽  
Yellow Birch ◽  
Mixed Stands ◽  
The Dead

An outbreak of spruce budworm, Choristoneura fumiferana (Clem.), occurred between 1974 and 1987, in Quebec, in the eastern balsam fir, Abies balsamea (L.) Mill, - yellow birch, Betula alleghaniensis Britton, ecoclimatic sub-domain. The effect of this disruption has been assessed in mesic balsam fir stands killed during the outbreak, in mesic balsam fir stands partially damaged and in the following stands, also partially damaged: mesic yellow birch – balsam fir stands, mesic white birch, Betulapapyrifera Marsh., - balsam fir stands, mesic balsam fir – yellow birch stands, mesic balsam fir – white birch stands and xeric balsam fir stands. To that effect, surveys were led before, immediately after, and about five years after the outbreak in two blocks that have not been protected with insecticides. These blocks, located in Charlevoix and in Shipshaw management units, are second growth stands originating from clearcuts which occured about 50 years ago. Approximately five years after the outbreak, abundant coniferous regeneration was found everywhere except in the mesic yellow birch –balsam fir stand and in the dead mesic balsam fir stand, where softwood represented less than 50% of the regeneration. On the other hand, young softwood stems were located under the regeneration of white birch and of mountain maple, Acer spicatum Lam, in dead balsam fir stands, in balsam fir – white birch stands, as well as in living balsam fir stands and under mountain maple in yellow birch – balsam fir stands and in balsam fir – yellow birch stands. Our age structures indicate that softwood advance growth was relatively rare in these stands. Thus, during the opening of the canopy by the spruce budworm, intolerant hard-woods and shrubs invaded the still available microsites. In the dead balsam fir stands, stocking of the dominant hardwood regeneration stems is equivalent to that of softwood. Thus, dead balsam fir stands are turning to mixed stands. Xeric stands will remain softwood stands since they show luxuriant softwood regeneration dominating in height. In the other stands, we will have to wait the harvest period before we can adequately assess succession.

THE LEPIDOPTERA OF THE NORTH SHORE OF THE GULF OF ST. LAWRENCE

1930 ◽  
Vol 62 (5) ◽  
pp. 107-117 ◽  
Author(s):  
J. McDunnough
Keyword(s):  
Geographical Distribution ◽  
The Other ◽  
North Shore ◽  
The North ◽  
The One

The following list is compiled from specimens collected by Mr. W. J. Brown in 1929; it should prove of interest to students of geographical distribution, containing, as it does, large elements of the Labrador fauna on the one hand and typical members of the Canadian and Hudsonian zones on the other. As far as I know Wm. Couper has been the only one who has published on the Lepidoptera of this region (Can. Ent., I, 67; IV, 201; VI, 33 et seq.) and his work has been confined largely to diurnals.

A Fragile Truce

2019 ◽  
pp. 228-232
Author(s):  
Paul A. Rahe
Keyword(s):  
Balance Of Power ◽  
The Other ◽  
The West ◽  
North Shore ◽  
The North ◽  
Sphere Of Influence

This concluding chapter discusses the agreement conducted between the Athenian diplomat Callias and the Spartans during the 440s. The resulting arrangement reflected an enduring balance of power. It acknowledged the facts and left the Spartans and their allies supreme on land and the Athenians supreme at sea. In the aftermath, neither was in a position to strike terror into the other. The Peloponnesus was once again a bastion of defense for Lacedaemon, and Athens retained her Long Walls, her maritime allies, and her great fleet. Furthermore, neither Sparta nor Athens nursed a grievance. Apart from Aegina and Naupactus and perhaps Molycreium to the north of the Corinthian Gulf and Chalcis to the west on the north shore of the Gulf of Patras, Athens relinquished everything that she had seized. None of her remaining acquisitions lay within Lacedaemon's natural sphere of influence; and, to head off possible objections on the part of the Spartans, she may even have reiterated that she would honor the autonomy of their sometime allies the Aeginetans.

Les forêts de la Côte Nord au Québec sont-elles sujettes aux déprédations par la tordeuse?

1983 ◽  
Vol 59 (1) ◽  
pp. 17-20 ◽  
Author(s):  
J. Robert Blais
Keyword(s):  
Tree Mortality ◽  
Growth Ring ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Balsam Fir ◽  
North Shore ◽  
The North ◽  
River Region ◽  
Saguenay River ◽  
The Impact

Quebec's North Shore is a vast region comprising about one third of productive forests in the province. The impact of the spruce budworm (Choristoneura fumiferana (Clem.)) in this remote region was not welt known. In the summer of 1981, ground and aerial surveys were conducted to determine the extent to which fir stands had been affected during the current bud-worm outbreak. It was possible to confirm that defoliation had been severe for several successive years prior to 1978, and that since then, insect populations had diminished considerably. Available information on balsam fir mortality indicated only two areas: one in Saguenay River region in the extreme southwest of the study area, and the other in the vicinity of Baie Comeau. The 1981 surveys revealed that varying quantities of fir had succumbed to budworm attack in many stands occurring for hundreds of kilometers east of Baie Comeau. The spruce budworm maintained high populations sufficiently long to cause pockets of tree mortality over a widespread area on the North Shore. Growth-ring measurements on several old balsam fir and white spruce trees from many localities indicated that no other widespread budworm outbreak had occurred on the North Shore since the end of the nineteenth century.

A pattern of forest types on ribbed moraines in eastern Newfoundland

1978 ◽  
Vol 8 (1) ◽  
pp. 116-120 ◽  
Author(s):  
B. B. Delaney ◽  
M. J. Cahill
Keyword(s):  
Forest Type ◽  
Black Spruce ◽  
Vegetation Succession ◽  
Balsam Fir ◽  
North Slope ◽  
Forest Site ◽  
Distinctive Pattern ◽  
Forest Types ◽  
White Birch ◽  
Avalon Peninsula

A distinctive pattern of forest types has been observed on ribbed moraines of the Avalon Peninsula, Newfoundland. This previously unreported pattern is interesting in that the best forests occur on the exposed tops and the theoretically less favourable north slopes. On each moraine, the south slopes characteristically had an uncommercial forest of balsam fir (Abiesbalsamea (L.) (Mill.)) and black spruce (Piceamariana (Mill.) BSP.), the top and upper north slopes had a forest of white birch (Betulapapyrifera Marsh.) and balsam fir, and the lower north slope had a pure balsam fir forest. Site descriptions are provided for each forest type and the vegetation succession following fire is proposed.

An Abnormal Larva of Epinotia solandriana Linn. (Lepidoptera: Tortricidae)

1964 ◽  
Vol 96 (3) ◽  
pp. 514-514 ◽  
Author(s):  
O. H. Lindquist
Keyword(s):  
Lake Huron ◽  
Betula Papyrifera ◽  
White Birch ◽  
Forest Insect ◽  
Leaf Roller ◽  
North Shore ◽  
The North ◽  
Wide Range ◽  
Insect Survey ◽  
The Right

Thousands of lepidopterous larvae representing a wide range of species are collected every year in Ontario by the Forest Insect Survey. Many of these require microscopic examination for identification. During a 10-year period I have only found one specimen with an extra pedal appendage.In June 1963, a larva with an extra anal proleg on the right side was collected by H. G. McPhee near Thessalon, Ont., on the north shore of Lake Huron. The species was Epinotia solandriana Linn., a leaf roller on white birch, Betula papyrifera Marsh. A subsequent large collection from the same area contained only normal specimens.

Susceptibility of balsam fir to spruce budworm defoliation as affected by thinning

1979 ◽  
Vol 9 (3) ◽  
pp. 428-435 ◽  
Author(s):  
Gregory W. Crook ◽  
Paul E. Vézina ◽  
Yvan Hardy
Keyword(s):  
Forest Type ◽  
Coniferous Forest ◽  
Basal Area ◽  
Spruce Budworm ◽  
White Spruce ◽  
Balsam Fir ◽  
Stand Age ◽  
Forest Types ◽  
Mixed Stands ◽  
Number Of Stems

Spruce budworm, Choristoneurafumiferana (Clemens), defoliation of balsam fir, Abiesbalsamea (L.) Mill., was studied in thinned stands of the Lower St. Lawrence region of Quebec. The object of the study was to quantify defoliation levels in treated and control plots in order to determine what effect, if any, thinning had on the susceptibility of balsam fir.Three main forest types were studied: (a) coniferous, (b) mixed, and (c) hardwood with a fir understory. The coniferous forest type was subdivided into three types: (1) pure balsam fir; (2) balsam fir – white spruce, Piceaglauca (Moench) Voss; (3) balsam fir – hardwoods. Defoliation levels were estimated using two current techniques: the Dorais–Hardy (1976) and the Fettes (1950) methods.Susceptibility of balsam fir to spruce budworm defoliation was not affected after thinning in coniferous and hardwood forest types; however, susceptibility was increased in mixed stands when part of the hardwood cover was removed. In any situation, defoliation of fir was found to be more intense with an increase of the basal area of the coniferous species (balsam fir, red spruce, Picearubens Sarg., and white spruce) while an increase of the basal area of hardwoods resulted in lower defoliation levels; likewise, a higher number of stems per hectare brought higher defoliation levels of fir. Defoliation was also found to vary with stand composition; susceptibility of fir in the three main cover types decreased in the following order: (a) coniferous, (b) mixed, (c) hardwood. Stand age was not a factor influencing the susceptibility of balsam fir for the two age classes studied (30 and 50 years).

Urartian Reliefs at Adılcevaz, on Lake Van, and a Rock Relief from the Karasu, near Birecik

1958 ◽  
Vol 8 ◽  
pp. 211-218 ◽  
Author(s):  
C. A. Burney ◽  
G. R. J. Lawson
Keyword(s):  
Primary School ◽  
The Other ◽  
Solid Base ◽  
Lake Van ◽  
North Shore ◽  
The North ◽  
Right Hand ◽  
Relief Sculpture ◽  
The Right

The Medieval Castle at Adılcevaz, on the north shore of Lake Van, incorporated in its walls fragments of a relief sculpture carved in basalt. Six such fragments have now been recovered. Two Urartian inscribed blocks, also of basalt, which have for some years stood outside the primary school, had also, no doubt, been used in the wall of the mediaeval castle.The fragments of sculpture belong to a relief representing a god or king standing on a bull, facing left towards two triple spearheads, placed one above the other. Five of the fragments belong to this figure, but the sixth shows that there was another figure, looking towards the first and likewise facing a triple spearhead. Behind the right-hand figure stands a single triple spearhead, rather taller and more slender than those in the middle, and perhaps fixed on some solid base, only part of which remains. The god or king wears an elaborately decorated garment, probably woven of wool: the pattern, perhaps in gold brocade, is repetitive, with a wide border, edged with a fringe and a band of “herring-bone” pattern.

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