Results 171 to 180 of about 74,135 (217)
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Spruce Budworm Control in a White Spruce Plantation, 1977
Insecticide and Acaricide Tests, 1978Abstract The test was designed to compare two experimental numbered compounds and a new formulation of Sevin to a standard formulation, Sevimol. Treatments were assigned randomly to three 30 x 30 ft plots marked out in the plantation. Treated plots were separated by 25 ft buffers.
J. B. Dimond, T. A. Morrison
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The Hybrid White Spruce X Himalayan Spruce
1982Picea glauca and P. amithiana were successfully crossed. Crossability ranged from 2 to 30 percent depending on the female P. glauca parent tree. Early characteristics and growth in Wisconsin and in New Brunswick are described. P.
H. Nienstaedt, D. P. Fowler
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Scopelophila ligulata (Spruce) Spruce.
2012Nell'ambito della redazione di schede di assesment per la realizzazione di una lista rossa della flora vascolare e crittogamica italiana, viene presentata la scheda relativa a Scopelophila ligulata (Spruce) Spruce.
ALEFFI, Michele, TACCHI, Roberta
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The phenology of white spruce and the spruce budworm in northern Alberta
Canadian Journal of Forest Research, 1992Studies on the development of spruce budworm (Choristoneurafumiferana (Clem.)) on white spruce (Piceaglauca (Moench) Voss) were conducted in northern Alberta in 1969 and again in 1990. The phenology of this insect and its host were described using stochastic models.
W.J.A. Volney, H.F. Cerezke
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Palaeohistory of the Spruce in Switzerland
Nature, 1970Pollen and carbon dating suggest that the Post-Glacial spread of the spruce (Picea) in Switzerland has been influenced by human activity. This is different from the situation in the eastern Alps.
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Spruce Beetle Effects on a White Spruce Stand in Alaska
Journal of Forestry, 1974Abstract A severe infestation of spruce beetle (Dendroctonus rufipennis Kby.) in a white spruce (Picea glauca [Moench] Voss)-paper birch (Betula papyrifera var.) stand caused 64.6 percent mortality of spruce 5 inches d.b.h. and larger where the infestation was completed. Survival of spruce was greater in smaller diameters.
Bruce H. Baker, Jerry A. Kemperman
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COMPARATIVE CHARACTERISTICS OF THE KISLICHNY SPRUCE AND THE DOLGOMOSHNY SPRUCE
Materials of the All-Russian scientific and practical conference dedicated to the 100th anniversary of the birth of Professor Vladimir Ageevich Bugaev "Forestry, forest management, forest management in the 21st century: problems and solutions"Comparative data on the structure of the kislichny spruce and the Dolgomoshny spruce are present-ed. The objects of the study are located in the Prionezhsky forestry of the Republic of Karelia. The vegetation of the lower tiers was taken into account on circular accounting sites of 10 m2 each. It is shown that the average height and average diameter of
Anatoliy Gryaz'kin +2 more
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Bud and crown architecture of white spruce and black spruce
Trees, 2006Needle primordia in buds and branch lengths were assessed in the crown of a plantation-grown white spruce tree. There was a gradation in needle primordia in buds in branches within the crown. The largest number of primordia was in the terminal bud of the leading main stem shoot, with the number in first-order whorl lateral shoot terminal buds ...
Stephen J. Colombo +1 more
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A new hybrid between blue spruce and white spruce
Canadian Journal of Botany, 1969Controlled pollinations were made within and between blue spruce (Picea pungens Engelm.) and white spruce (Picea glauca (Moench) Voss) in 1967 and 1968. Interspecific hybrids were obtained and verified by comparative measurements of several traits. The cross was successful when either species was used as the female parent.
James W. Hanover, Ronald C. Wilkinson
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