- Ferrell, G. T. 1969a. Host selection by the fir engraver Scolytus ventralis Lec. (Coleoptera: Scolytidae). Unpublished dissertation, University of California, Berkeley. 122 p.
- Ferrell, G. T. 1969b. Host selection by the fir engraver Scolytus ventralis Lec (Coleoptera, Scolytidae). Dissertation Abstracts 30B:2238.
- Ferrell, G. T. 1971. Host selection by the fir engraver, Scolytus ventralis (Coleoptera: Scolytidae), preliminary field studies . Canadian Entomologist 103:1717-1725.
- Ferrell, G. T. 1973a. Stand and tree characteristics influencing density of fir engraver beetle attack scars in white fir. United States Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station, Research Paper PSW-97. 8 p.
- Ferrell, G. T. 1973b. Weather, logging, and tree growth associated with fir engraver attack scars in white fir. United States Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station, Research Paper PSW-92. 13 p.
- Ferrell, G. T. 1974. Moisture stress and fir engraver (Coleoptera: Scolytidae) attack in white fir infected by true mistletoe . Canadian Entomologist 106:315-318.
- Ferrell, G. T. 1978. Moisture stress threshold of susceptibility to fir engraver beetles in pole-size white firs . Forest Science 24:85-92.
- Ferrell, G. T. 1983. Host resistance to the fir engraver, Scolytus ventralis (Coleoptera: Scolytidae): frequencies of attacks contacting cortical resin blisters and canals of Abies concolor . Canadian Entomologist 115:1421-1428.
- Ferrell, G. T., and R. C. Hall. 1975. Weather and tree growth associated with white fir mortality by fir engraver and roundheaded fir borer. United States Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station, Research Paper PSW-109. 11 p.
- Ferrell, G. T., and R. S. Smith. 1976. Indicators of Fomes annosus root decay and bark-beetle susceptibility in sapling white fir . Forest Science 22:365-369.
- Smith, R. H., B. E. Wickman, R. C. Hall, C. J. DeMars, and G. T. Ferrell. 1981. The California pine risk-rating system: its development, use and relationship to other systems. Pages 53-69 in R. L. Heddin, S. J. Barras, and J. E. Coster, Hazard-rating systems in forest insect pest management symposium proceedings. United States Department of Agriculture, Forest Service, General Technical Report WO-27. 169 p.
- Berryman, A. A., and G. T. Ferrell. 1988. The fir engraver beetle in western states. Pages 555-577 in A. A. Berryman, Dynamics of forest insect populations: patterns, causes, implications. Plenum Press, New York. xx + 603 p.
- DeMars, C. J., G. T. Ferrell, and W. J. Ostrosina. 1988. Host-insect/disease interactions in drought-stressed white fir stands at Lake Tahoe, California. Pages 135-146 in T L. Payne and H. Saarenmaa, Integrated control of scolytid bark beetles. Virginia Polytechnic and State University, Blacksburg, Virginia. 355 p.
- Ferrell, G. T. 1986a. Fir engraver. United States Department of Agriculture, Forest Service, Insect and Disease Leaflet 13. 8 p.
- Ferrell, G. T. 1986b. Using indicator plants to assess susceptibility of California red fir and white fir to the fir engraver beetle. United States Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station (Berkeley, California), Research Note PSW-388. 5 p.
- Ferrell, G. T. 1988. Wound-induced oleoresins of Abies concolor: is it part of host resistance to the fir engraver Scolytus ventralis? Pages 305-312 in W. J. Mattson, J. Levieux, and C. Bernard-Dagan, Mechanisms of woody plant defenses against insects: search for pattern. Springer, New York. xiv + 416 p.
- Ferrell, G. T., C. J. D. Mars, C. B. Williams, and W. J. Otrosina. 1988. Fir engraver outbreaks and tree mortality related to forest site and stand characteristics . Northwest Environmental Journal 4:334-335.
- Ferrell, G. T., W. J. Otrosina, and C. J. D. Mars. 1988. White fir characteristics associated with wound response to Trichosporium symbioticum fungal symbiont of the fir engraver beetle . Phytopathology 78:1533.
- Lieutier, F., and G. T. Ferrell. 1988a. Relationships between indexes of tree vigour and the induced defense reaction of Scots pine to a fungus associated with Ips sexdentatus (Coleoptera: Scolytidae) . International Congress of Entomology, Proceedings 18:430.
- Lieutier, F., and G. T. Ferrell. 1988b. Relationships between indexes of tree vigour and the induced defense reaction of Scots pine to a fungus associated with Ips sexdentatus Boern. (Coleoptera: Scolytidae). Pages 163-178 in T L. Payne and H. Saarenmaa, Integrated control of scolytid bark beetles. Virginia Polytechnic and State University, Blacksburg, Virginia. 355 p.
- Otrosina, W. J., and G. T. Ferrell. 1989. Effects of water stress on white fir wound response to Trichosporium symbioticum fungal symbiont of the fir engraver beetle . Phytopathology 79:1164.
- Bedard, W., G. Ferrell, M. Whitmore, and A. Robertson. 1990. Trapping evaluation of beetle vectors of black stain root disease in Douglas fir . The Canadian Entomologist 122:459-468.
- Ferrell, G., W. Otrosina, and C. DeMars. 1993. Assessing the susceptibility of white fir to the fir engraver, Scolytus ventralis LeC. (Coleoptera: Scolytidae), using fungal inoculation. The Canadian Entomologist 125: 895-901.
- Ferrell, G., W. Otrosina, and C. DeMars. 1994. Predicting susceptibility of white fir during a drought-associated outbreak of the fir engraver, Scolytus ventralis, in California . Canadian Journal of Forest Research 24:302-305.
- Otrosina, W., and G. Ferrell. 1992. Resistance of white fir provenances to the fir engraver (Scolytus ventralis)—Trichosporum symbioticum complex. Page 153 In Douglas C. Allen and L.P. Abrahamson (eds.), Proceedings: North American Forest Insect Work Conference, Denver, Colorado, March 25-28, 1991. United States Department of Agriculture, Forest Service, Pacific Northwest Research Station (Portland, OR), General Technical Report PNW-GTR-294.
- Williams, C., D. Azuma, and G. Ferrell. 1992. Incidence and effects of endemic populations of forest pests in young mixed-conifer forests of the Sierra Nevada. United States Department of Agriculture, Forest Service, Pacific Southwest Research Station (Berkeley, CA), Research Paper PSW-RP-212.
- Otrosina, W., and G. Ferrell. 1995. Root disease: primary agents and secondary consequences of disturbance. Pages 87-92 In Forest health through silviculture: Proceedings of the 1995 National Silviculture Workshop, Mescalero, New Mexico, May 8-11, 1995. United States Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station (Ft. Collins, CO), General Technical Report RM-267.