Results 121 to 130 of about 3,567 (170)

Balsam Fir, Control of Balsam Gall Midge, 1984

Insecticide and Acaricide Tests, 1985
Abstract A Christmas tree plantation in Plymouth, Maine was used for the insecticide evaluations. Insecticides were applied to 0.25-acre blocks on 28 May using a Stihl SG 17 mistblower at a rate of 5 gal finished spray/acre. Insects were predominantly first instar although some unhatched eggs were present.
R. L. Bradbury, E. A. Osgood
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Temporal patterns of balsam fir sawfly defoliation and growth loss in young balsam fir

Forest Ecology and Management, 2003
A 2-year field study was carried out with the balsam fir sawfly, Neodiprion abietis (Harris), on balsam fir, Abies balsamea (L.) Mill., to determine: (1) the temporal patterns of defoliation and foliage weight loss associated with early- and late-larval instars; (2) the losses in branch and tree stem volume growth as a result of defoliation by larvae ...
Ken Parsons, Dan Quiring, Harald Piene, James Farrell   +3 more
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WETWOOD FORMATION IN BALSAM FIR

Canadian Journal of Botany, 1962
The occurrence and distribution of wetwood in balsam fir (Abies balsamea (L.) Mill. was investigated from the standpoint of determining the factors affecting its formation. Young, rapidly growing trees, namely those with wide annual rings, were found to be most subject to wetwood.
D. E. Etheridge, L. A. Morin
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IN VITRO ALLELOPATHIC INHIBITION OF NITRIFICATION BY BALSAM POPLAR AND BALSAM FIR

American Journal of Botany, 1982
A soil percolation apparatus was used to study the effect of plant extracts on nitrification. Foliar leachates, leaf extracts, and bud extracts of balsam fir (Abies balsamea) and balsam poplar (Populus balsamifera) were added to the ammonium percolation solution.
J.‐Robert Thibault, J.‐Andre Fortin, Wladimir A. Smirnoff   +2 more
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DIEBACK OF BALSAM FIR IN ONTARIO

Canadian Journal of Botany, 1961
An outbreak of balsam fir dieback in Ontario, which was first reported in 1954, reached its peak throughout the Province in 1955 and gradually receded during subsequent years. The dieback, which involved leaders, branches, and occasionally entire trees, appeared when those parts died as the result of their proximal invasion by a fungus.
F L Raymond, J Reid
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An effect of gravity on bud-burst in balsam fir

Tree Physiology, 1986
Bud-burst on first order lateral branches of Abies bafsamea L. (balsam fir) was delayed when the branches were rotated 180 degrees about their long axis. This was not a consequence of injury caused by the treatment because buds rotated 180 degrees on inverted plants flushed at the same time as the controls, whereas flushing of all other buds was ...
J, Worrall, C H, Little
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Growth loss and recovery following defoliation by the balsam fir sawfly in young, spaced balsam fir stands

The Canadian Entomologist, 2001
AbstractTwo stands of intensively managed balsam fir [Abies balsamea (L.) Mill. (Pinaceae)] in western Newfoundland, located within an area infested by the balsam fir sawfly, Neodiprion abietis (Harr.) (Hymenoptera: Diprionidae) complex, were selected to study growth loss and recovery following severe defoliation by the balsam fir sawfly in the early ...
Harald Piene, Don P. Ostaff, Eldon S. Eveleigh   +2 more
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The Impact of Balsam Woolly Aphid Damage on Balsam Fir Stands in Newfoundland

Canadian Journal of Forest Research, 1975
This paper presents data on the effects of balsam woolly aphid damage on the mensurational characteristics of balsam fir trees and stands, and quantitative estimates of changes in merchantable volumes that result from alterations in these characteristics.
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A method for reconstructing the development of the sapwood area of balsam fir

Tree Physiology, 1990
Leaf area is commonly estimated as a function of sapwood area. However, because sapwood changes to heartwood over time, it has not previously been possible to reconstruct either the sapwood area or the leaf area of older trees into the past. In this study, we report a method for reconstructing the development of the sapwood area of dominant and ...
M R, Coyea, H A, Margolis, R R, Gagnon
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Freezing injury and shoot elongation in balsam fir

Canadian Journal of Forest Research, 1977
Three-year-old seedlings of balsam fir (Abiesbalsamea (L.) Mill.) representing provenances with different rates of shoot growth initiation were exposed to four temperatures between −3.3 and −8.5 °C at two different times during shoot elongation. Exposure at −3.3 °C resulted in no bud, shoot, or leaf injury. Exposure at −8.5 °C resulted in injury to 53%
D. T. Lester, S. E. Lindow, C. D. Upper
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