Ruth, D.S.
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Effect of Diatomaceous earth, malathion, dimethoate and permethrin on Leptoglossus occidentalis (Hemiptera: Coreidae): A pest of conifer seed
Year: 1987
Catalog ID: 2762
Issued by: Pacific Forestry Centre
Availability: Order paper copy (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)
Year: 1986
Catalog ID: 2554
Issued by: Pacific Forestry Centre
Availability: Order paper copy (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
Issued by: Pacific Forestry Centre
Availability: Not available through the CFS (click for more information).
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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
Issued by: Pacific Forestry Centre
Availability: Order paper copy (free)
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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
Issued by: Pacific Forestry Centre
Availability: Order paper copy (free)
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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
Issued by: Pacific Forestry Centre
Availability: PDF (download)
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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
Issued by: Pacific Forestry Centre
Availability: Order paper copy (free)
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Unusual phenomenon of diapause in Barbara colfaxiana
Year: 1981
Catalog ID: 2047
Issued by: Pacific Forestry Centre
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
Issued by: Pacific Forestry Centre
Availability: PDF (download)
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A guide to insect pests in Douglas-fir seed orchards
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Cone and seed insects, Cariboo Forest Region
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Observations on a twigminer, Argyresthia pseudotsuga Freeman (Lepidoptera: Yponomeutidae) in Douglas-fir seed orchards
Year: 1979
Catalog ID: 1818
Issued by: Pacific Forestry Centre
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
Year: 1978
Catalog ID: 1802
Issued by: Pacific Forestry Centre
Availability: Not available through the CFS (click for more information).
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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
Issued by: Pacific Forestry Centre
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
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Temperature treatment of Douglas-fir seeds to control the seed chalcid Megastigmus spermotrophus Wachtl
Year: 1974
Catalog ID: 29110
Issued by: Pacific Forestry Centre
Availability: PDF (request by e-mail)
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Barbara colfaxianna siskivouana (Kft.), a pest in cones of Abies grandis
Year: 1974
Catalog ID: 29100
Issued by: Pacific Forestry Centre
Availability: Not available through the CFS (click for more information).
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A Douglas-fir twig mining beetle, Pityophthorus orarius (Coleoptera: Scolytidae)
Year: 1970
Catalog ID: 28210
Issued by: Pacific Forestry Centre
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
Year: 1969
Catalog ID: 28015
Issued by: Pacific Forestry Centre
Availability: Not available through the CFS (click for more information).
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Studies on spruce plantations at Green Timbers
Year: 1966
Catalog ID: 25940
Issued by: Pacific Forestry Centre
Availability: Order paper copy (free), PDF (download)
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Preliminary survey of spruce beetle populations in logging slash in the Prince George Forest District August, 1964
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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
Issued by: Pacific Forestry Centre
Availability: Not available through the CFS (click for more information).
