AGATHIS BINOMINATA (HYMENOPTERA: BRACONIDAE) PARASITIZING RHYACIONIA BUOLIANA (LEPIDOPTERA: OLETHREUTIDAE) IN CENTRAL ONTARIO

1968 ◽  
Vol 100 (8) ◽  
pp. 893-893
Author(s):  
Paul D. Syme
Keyword(s):  
Red Pine ◽  
Severe Winter ◽  
Pine Plantation ◽  
Department Of Agriculture ◽  
Southern Ontario ◽  
Canada Department ◽  
Internal Parasite ◽  
Coleophora Laricella ◽  
Rhyacionia Frustrana ◽  
Made In

Dissections of larvae from a routine collection of European pine shoot moth (Rhyacionia buoliana (Schiffermüller)) made on 12 October 1965 in a small red pine plantation in Con. VII, Mills Twp., Manitoulin Island, Ont., revealed the presence of larvae of an unrecognized parasite in approximately 44% of the 103 living shoot moth larvae obtained. This compares favourably with rates of approximately 40% found by the author for Orgilus obscurator Nees, the most effective internal parasite of shoot moth in southern Ontario. No adults of the unrecognized parasite were obtained at that time, and because of severe winter kill of the shoot moth, none were obtained in a sample made in the following spring from the same plantation. However, shoot moth larvae obtained in a sample taken on 4 October 1966 yielded similar larvae on dissection, and rearings produced adult parasites which were identified by Dr. W. R. M. Mason, Entomology Research Institute, Canada Department of Agriculture, Ottawa, Ont., as Agathis binominata Muesebeck. According to Muesebeck et al. (1951), Krombein et al. (1967), and Yates (1967), the following species are hosts of this parasite: Coleophora laricella (Hübner), Epiblema desertana (Zeller) , Epinotia nanana (Treitschke) , Petrova comstockiana (Fernald), Phalonia rutilana (Hübner) , Pulicalvaria coniferella (Kearfott) , P. piceaella (Kearfott) , and Rhyacionia frustrana (Comstock). Its association with Rhyacionia buoliana apparently has not been recorded previously.

Experimental Plantings of Brook Trout (Salvelinus fontinalis) from Furunculosis-Infected Stock

1968 ◽  
Vol 25 (12) ◽  
pp. 2643-2649 ◽  
Author(s):  
L. A. McDermott ◽  
A. H. Berst
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Infected Fish ◽  
Aeromonas Salmonicida ◽  
Control Fish ◽  
Southern Ontario ◽  
Trout Population ◽  
Hatchery Stock ◽  
Associated Species ◽  
Made In

Preliminary sampling revealed the presence of furunculosis disease in the resident brook trout population of the southern Ontario trout stream used in this study.Two plantings of marked yearling brook trout were made in the study area in 1966; one in the spring, and the other in the fall. The spring planting consisted of 1000 brook trout with a predetermined incidence of furunculosis infection and an equal number of trout with no evidence of infection. The fall planting consisted of 2000 brook trout with a known incidence of furunculosis infection.The stream was electrofished periodically during the 2-year period after the first planting. A total of 445 brook trout (140 of the planted hatchery stock, and 305 resident trout) and 127 fish of associated species were captured and examined for the presence of Aeromonas salmonicida, causative agent of furunculosis.Recovery rates of the "infected" and "noninfected" stocks of brook trout were similar, and there was no evidence of transmission of A. salmonicida from the infected fish to the control fish, nor the resident population of brook trout and other species of fish captured.

scholarly journals Update on the Growth and Yield of the Rockland Red Pine Plantation

1982 ◽  
Vol 58 (5) ◽  
pp. 211-212 ◽  
Author(s):  
F. W. von Althen ◽  
W. M. Stiell
Keyword(s):  
Red Pine ◽  
Growth And Yield ◽  
Pine Plantation

Estimation de la production de jeunes plantations de pin rouge et de pin gris du sud du Québec

1976 ◽  
Vol 6 (4) ◽  
pp. 478-486 ◽  
Author(s):  
H. A. Bolghari
Keyword(s):  
Multiple Regression ◽  
Jack Pine ◽  
Red Pine ◽  
Pine Plantations ◽  
Regression Equations ◽  
Pine Plantation ◽  
South Shore ◽  
Pine Stands ◽  
Natural Stands ◽  
St Lawrence River

Multiple regression equations have been developed to predict yield from young red pine and jack pine plantations. Data from 446 sample plots representing young red pine and jack pine stands located on the south shore of the St. Lawrence River between Quebec and Montreal were analysed. The red pine plantation yielded more than the jack pine. However, in plantation both species yield more than in natural stands. Taking into account the age and spacing of the sampled plantations, the equation obtained can provide information on yield of red pine and jack pine stands the maximum spacing of which is 3 × 3 m, up to the age of 45 and 35 years respectively. The equations will allow the construction of preliminary yield tables for both species.

Growth of Clumped vs. Equally Spaced Trees

1982 ◽  
Vol 58 (1) ◽  
pp. 23-25 ◽  
Author(s):  
W. M. Stiell
Keyword(s):  
Basal Area ◽  
Pinus Resinosa ◽  
Red Pine ◽  
Form Class ◽  
Significant Tendency ◽  
Made In ◽  
Crown Size

Fifteen-year results are presented for a thinning experiment made in 13-year-old red pine (Pinus resinosa Ait.), designed to compare growth of trees in 4-tree clumps with that of uniformly spaced trees, in both cases growing at 890 stems/ha. By the end of the period, average crown size, form class and height were about the same for both stands, but growth by trees in clumps had been less for dbh and for basal area and total volume per hectare. Clumped trees had a significant tendency to lean away from each other. It was concluded that control of inter-tree spacing at planting or thinning is justified to the extent that clumps of more than three adjacent trees be avoided.

Insects Affecting Seed Production in Red Pine: IV. Recognition and Extent of Damage to Cones

1957 ◽  
Vol 89 (6) ◽  
pp. 264-271 ◽  
Author(s):  
L. A. Lyons
Keyword(s):  
Seed Production ◽  
Production Capacity ◽  
Red Pine ◽  
Natural Control ◽  
Present Contribution ◽  
Southern Ontario ◽  
Pine Cone ◽  
Poor Seed ◽  
Extent Of Damage ◽  
Cone Damage

The broad study of factors responsible for poor seed production by red pines (Pinus resinosae Ait.) in central and southern Ontario has been concerned with the seed production capacity and efficiency of sound cones (1) and the description, life history, behaviour, and natural control of cone-inhabiting insects (2, 3, 4). The present contribution, which concludes the four-part series on red pine cone insects, deals with the time and duration of cone attack by the various insect species and the variability in the intensity of cone damage from year to year and from one locality to another. As an aid to the field diagnosis of the cause of cone damage, keys based on the appearance of mature larvae and injured cones are included.

DIFFERENCES IN MARKET QUALITY BETWEEN BROILER STRAINS AS EVALUATED BY MARKET GRADING

1959 ◽  
Vol 39 (1) ◽  
pp. 121-127
Author(s):  
E. S. Merritt
Keyword(s):  
Body Weight ◽  
Random Sample ◽  
Market Quality ◽  
Department Of Agriculture ◽  
High Positive Correlation ◽  
Positive Correlation ◽  
Canada Department

Chicks from 10 broiler strains were randomly allotted and reared at three farms. At 10 weeks of age a random sample consisting of 60 birds of each strain, with an equal number of each sex, was taken at each farm, slaughtered and market graded. At each farm, an official inspector graded the birds according to the standards of the Canada Department of Agriculture. Each bird was graded for the four grade factors: conformation, fleshing, fat and dressing.The number of birds in each grade class was not independent of farm, sex or strain. The 10 strains, ranked on grade scores, tended to rank in the same order at each farm, although the agreement was better for some grade factors than others, and was better when based on males than on females. On a strain rank basis, the grade scores for any one grade factor were not, in general, indicative of the scores for any other grade factor. Also on a strain rank basis, there was a high positive correlation between breast angle and grade scores for fleshing: body weight was not correlated with grade scores for any of the four grade factors, with the possible exception of conformation in the case of males.

EFFECT OF MAGNESIUM AND POTASSIUM FERTILIZATION ON A 20-YEAR-OLD RED PINE PLANTATION

1965 ◽  
Vol 41 (3) ◽  
pp. 290-294 ◽  
Author(s):  
J. D. Gagnon
Keyword(s):  
Beneficial Effect ◽  
Pinus Resinosa ◽  
Growing Season ◽  
Red Pine ◽  
Pine Plantation ◽  
The Third ◽  
Potassium Fertilization ◽  
Current Growth

The fertilizers, Mg at a rate of 100 lbs/acre and K at 200 lbs/acre, were applied around each of 15 red pine (Pinus resinosa Ait.) to promote increased growth in a 20-year-old plantation which had failed to fulfil growth expectations. Successive measurements of diameter and height showed that the fertilizers stimulated diameter significantly after the second growing season, but height only after the third growing season. Beneficial effect of fertilizer applications on diameter and height persisted, and the differences in diameter and height between treated and untreated trees at the end of the seventh growing season was equivalent to two years' current growth.

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