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Publications by D.S. Ruth

22 records.

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Effect of Diatomaceous earth, malathion, dimethoate and permethrin on Leptoglossus occidentalis (Hemiptera: Coreidae): A pest of conifer seed
Summers, D.; Ruth, D.S.
Year: 1987    Catalog ID: 2762
Available from: Pacific Forestry Centre
CFS Availability: Print (free), PDF (request by e-mail)
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Effect of temperature during May to August on termination of prolonged diapause in Douglas-fir cone moth (Lepidoptera: Tortricidae)
Miller, G.E.; Ruth, D.S.
Year: 1986    Catalog ID: 2554
Available from: Pacific Forestry Centre
CFS Availability: Print (free)
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Chemical lure for male Douglas-fir cone moth, Barbara colfaxiana (Lepidoptera: Olethreutidae)
Hedlin, A.F.; Weatherston, J.; Ruth, D.S.; Miller, G.E.
Year: 1983    Catalog ID: 2269
Available from: Pacific Forestry Centre
CFS Availability: Print (free)
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Attraction of male Epinotia sp. to traps baited with isomers of Dodecenol and Dodecenyl Acetate
Miller, G.E.; Ruth, D.S.; Grant, G.G.
Year: 1983    Catalog ID: 2275
Available from: Pacific Forestry Centre
CFS Availability: Not available through the CFS (click for more information).
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Induction of prolonged diapause in Barbara colfaxiana (Lepidoptera: Olethreutidae): correlations with cone crops and weather
Hedlin, A.F.; Miller, G.E.; Ruth, D.S.
Year: 1982    Catalog ID: 2178
Available from: Pacific Forestry Centre
CFS Availability: Print (free)
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A guide to common insect pests and diseases in spruce seed orchards in British Columbia
A guide to common insect pests and diseases in spruce seed orchards in British Columbia
Ruth, D.S.; Miller, G.E.; Sutherland, J.R.
Year: 1982    Catalog ID: 2184
Available from: Pacific Forestry Centre
CFS Availability: PDF (download)
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Diapause in the pharate adult stage of insect development
Sahota, T.S.; Ruth, D.S.; Ibaraki, A.I.; Farris, S.H.; Peet, F.G.
Year: 1982    Catalog ID: 2288
Available from: Pacific Forestry Centre
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Unusual phenomenon of diapause in Barbara colfaxiana
Sahota, T.S.; Ruth, D.S.
Year: 1981    Catalog ID: 2047
Available from: Pacific Forestry Centre
CFS Availability: Not available through the CFS (click for more information).
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Cone and seed pests
Ruth, D.S.; Senecal, M.A.; Carlson, J.A.
Year: 1980    Catalog ID: 30790
Available from: Pacific Forestry Centre
CFS Availability: PDF (download)
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A guide to insect pests in Douglas-fir seed orchards
A guide to insect pests in Douglas-fir seed orchards
Ruth, D.S.
Year: 1980    Catalog ID: 2039
Available from: Pacific Forestry Centre
CFS Availability: Print (free), PDF (download)
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Cone and seed insects, Cariboo Forest Region
Allen, S.J.; Ruth, D.S.
Year: 1979    Catalog ID: 30776
Available from: Pacific Forestry Centre
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Observations on a twigminer, Argyresthia pseudotsuga Freeman (Lepidoptera: Yponomeutidae) in Douglas-fir seed orchards
Ruth, D.S.; Hedlin, A.F.
Year: 1979    Catalog ID: 1818
Available from: Pacific Forestry Centre
CFS Availability: Not available through the CFS (click for more information).
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Examination of Douglas-fir clones for differences in susceptibility to damage by cone and seed insects
Hedlin, A.F.; Ruth, D.S.
Year: 1978    Catalog ID: 1802
Available from: Pacific Forestry Centre
CFS Availability: Not available through the CFS (click for more information).
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Comparison of germinability of seed from insect-infested and uninfested cones
Hedlin, A.F.; Ruth, D.S.
Year: 1977    Catalog ID: 1604
Available from: Pacific Forestry Centre
CFS Availability: PDF (download)
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Chemical and field studies on the sex pheromones of the cone and seed moths Barbara colfaxiana and Laspeyresia youngana
Weatherston, J.; Hedlin, A.F.; Ruth, D.S.; MacDonald, L.M.; Leznoff, C.C.; Fyles, T.M.
Year: 1977    Catalog ID: 1629
Available from: Pacific Forestry Centre
CFS Availability: Not available through the CFS (click for more information).

Available from the Journal's Web site.
DOI: 10.1007/BF01944150
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Barbara colfaxianna siskivouana (Kft.), a pest in cones of Abies grandis
Hedlin, A.F.; Ruth, D.S.
Year: 1974    Catalog ID: 29100
Available from: Pacific Forestry Centre
CFS Availability: Not available through the CFS (click for more information).
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Temperature treatment of Douglas-fir seeds to control the seed chalcid Megastigmus spermotrophus Wachtl
Ruth, D.S.; Hedlin, A.F.
Year: 1974    Catalog ID: 29110
Available from: Pacific Forestry Centre
CFS Availability: PDF (request by e-mail)

Available from the Journal's Web site.
DOI: 10.1139/x74-065
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A Douglas-fir twig mining beetle, Pityophthorus orarius (Coleoptera: Scolytidae)
Hedlin, A.F.; Ruth, D.S.
Year: 1970    Catalog ID: 28210
Available from: Pacific Forestry Centre
CFS Availability: PDF (request by e-mail)
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Rearing the Douglas-fir cone moth, Barbara colfaxiana (Kearfott), on an artificial diet in the laboratory
Ruth, D.S.; Hedlin, A.F.
Year: 1969    Catalog ID: 28015
Available from: Pacific Forestry Centre
CFS Availability: Not available through the CFS (click for more information).
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Studies on spruce plantations at Green Timbers
Silver, G.T.; Ruth, D.S.
Year: 1966    Catalog ID: 25940
Available from: Pacific Forestry Centre
CFS Availability: Print (free), PDF (download)
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Preliminary survey of spruce beetle populations in logging slash in the Prince George Forest District August, 1964
Wood, R.O.; Ruth, D.S.
Year: 1966    Catalog ID: 25785
Available from: Pacific Forestry Centre
CFS Availability: PDF (download)
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European pine shoot moth survey, south coastal British Columbia, 1965
Harris, J.W.E.; Ruth, D.S.; Fridell, E.; Gibson, C.A.
Year: 1965    Catalog ID: 24132
Available from: Pacific Forestry Centre
CFS Availability: Not available through the CFS (click for more information).
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This may not be a complete list of the author's publications. This list provides the author's publications since he or she joined, or worked in cooperation with, the CFS. When available, another link is provided for periods of work elsewhere.