The effect of spruce plantation density on resilience of mixed forests in the Perm Krai [PDF]
, 2019 Over the course of the last few decades, many countries across the globe have experienced mass desiccation of spruce plantations. The subject of our research was the spruce forests of the Russian Perm Krai's mixed forest zone.
Ivanchina, L. A., Zalesov, S. V.
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Spruce Budworm Egg Mass Density on Balsam Fir and White Spruce: Low Population Levels (Lepidoptera: Tortricidae) [PDF]
, 2017 As part of a study to develop improved foliage sampling methods for spruce budworm, Choristoneura fumiferana (Clemens), egg masses, two balsam fir (four in one stand), Abies balsamea, and two white spruce, Picea glauca, trees were chosen from each of ...
Fowler, Gary W, Simmons, Gary A
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The Economics of Spruce Budworm Outbreaks in the Lake States: An Overview [PDF]
, 2017 Economic effects of spruce budworm outbreaks in the Lake States were examined. The recent outbreak caused spruce and fir mortality on 420 thousand ha (I.OS million acres) of commercial forest land in the Lake States.
Gregory, G. Robinson +3 more
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Considerations When Sampling Spruce Budworm Egg Masses on Balsam Fir and White Spruce in the Lake States: Low Population Levels [PDF]
, 2017 One cluster each of balsam fir, Abies balsamea, and white spruce, Picea glauca, trees was chosen from each of five stands of spruce-fir in Michigan\u27s Upper Peninsula.
Fowler, Gary W, Simmons, Gary A
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Spruce Budworm Weight and Fecundity: Means, Frequency Distributions, and Correlations for Two Populations (Lepidoptera: Tortricidae) [PDF]
, 2017 Pupal weights and fecundities of spruce budworm from Minnesota had different means, coefficients of variation, and frequency distributions than spruce budworm from New Hampshire.
Bauer, Leah S, Lorimer, Nancy
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Effect of White Spruce Release on Subsequent Defoliation by the Yellowheaded Spruce Sawfly, Pikonema Alaskensis (Hymenoptera: Tenthredinidae) [PDF]
, 2017 Hand release of 22 5-year-old white spruce, Picea glauca (Moench) Voss, dramatically increased the amount of defoliation by the yellowheaded spruce sawfly, Pikonema alaskens is . The percent defoliation of the released trees was six times the defoliation
Kulman, H. M, Morse, B. W
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Predation by Amphibians and Small Mammals on the Spruce Budworm (Lepidoptera: Tortricidae) [PDF]
, 2017 Stomach-content analyses of pitfall-trapped amphibians and small mammals showed that the eastern American toad, Bujo americanus americanus, and the wood frog, Rana sylvatica, preyed on late instars and moths of the spruce budworm, Choristoneura ...
Crawford, Hewlette S, Jr. +2 more
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Picea glauca: white spruce, Canadian spruce, cat spruce
Education and Research Archive, 2013 Species profile for Picea glauca: white spruce, Canadian spruce, cat ...
Wood, S., Gould, K., Smreciu, A.
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Field Tests of Kairomones to Increase Parasitism of Spruce Budworm (Lepidoptera: Tortricidae) Eggs by \u3ci\u3eTrichogramma\u3c/i\u3e Spp. (Hymenoptera: Trichogrammatidae) [PDF]
, 2017 Hexane extracts of spruce budworm, Choristoneura fumiferana, moth scales, applied at 0.04 moth-gram equivalents/branch and at 0.06 moth-gram equivalents/tree, failed to increase parasitism rates of Trichogramma spp.
Jennings, Daniel T, Jones, Richard L
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Diagnostics, 2023 Rheumatoid arthritis (RA) involves chronic inflammation of synovial joints, causing pain, stiffness, and limited mobility. 18F-sodium fluoride (NaF) is a PET tracer whose uptake reflects bone turnover, while 18F-fludeoxyglucose (FDG) shows glucose ...
Natasha Reddy +5 more
doaj +1 more source