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Whitney Cranshaw

Whitney Cranshaw


Professor and Extension Specialist

Emeritus Professor, Instructor
Office: TBD.  When things settle I will move to the C.P. Gillette Museum

Phone: No on-campus phone; communications must be done through email

Post-Retirement Research/Outreach Interests:
During my 37 year career at Colorado State I pursued a broad based research program largely related to Integrated Pest Management of all arthropods affecting horticultural commodities in Colorado, particularly vegetables, shade trees, turfgrass and specialty crops. In retirement it is my intention to continue to work on entomology related projects of all sorts, related to things that most interest me. These include, but are by no means limited to, biological control of Japanese beetle, pin oak kermes/drippy blight, and hemp entomology.

For the near future I also will be maintaining listserv discussion groups (ornaent, pesterv-l) websites (Insect Information Website, Hemp Insect Website) and Extension fact sheets related to entomology. I will be open to continue doing programs – in-person always preferred, but online as needed; contact me by email to discuss this.  For the most part I am planning to work on various long delayed writing projects including publications related to regional household insects, hemp insects and their management, and (ultimately), with Boris Kondratieff, a review of all the insects of Colorado.

Students Presently Advised:
On November 6, 2020 the last of the 38 graduate students I have advised/co-advised over the years successfully graduated and I will not be taking on any new students in the future.  I remain open to working as a member of graduate committees.

Courses Presently Taught:
356A Horticultural Entomology – Introduction (online, Fall semester)
356B Horticultural Entomology – Food Crops (online, Fall semester)
356C Horticultural Entomology – Turf and Ornamentals (online, Fall semester)

Selected Recent Research Publications:
Cranshaw, W. and S. Wainwright-Evans. 2020.  Cannabis sativa (L.) as a host of rice root aphid in North America.  J. Integrated Pest Management 11(1), 15


Cranshaw, W., M. Schreiner, K. Britt, T. P. Kuhar, J. McPartland, and J. Grant. 2019. Developing Insect Pest Management Systems for Hemp in the United States: A Work in Progress. Journal of Integrated Pest Management. Volume 10, Issue 1, 2019, 26,


Giladi, Y., L. Hadad, N. Luria, W. Cranshaw, O. Lachman, and A. Dombrovsky. 2019. First Report of Beet Curly Top Virus Infecting Cannabis sativa L., in Western Colorado. Plant Disease Published Online: 11 Nov 2019

Cranshaw, W., P. Forrence, and B. Kondratieff. 2019. Observations on development of Diogmites angustipennis Loew (Diptera: Asilidae) in a cultivated field. J. Kansas Entomol. Soc. 92(1): 412-414.

Sitz, R.A., and W.S. Cranshaw. 2018.  Life history of Allokermes galliformis (Hemiptera: Kermesidae) in Colorado.  Annals Entomol. Soc. Am. 111(5): 265-270.

Cranshaw, W.S. and K. Due. 2018. A Survey of the cluster flies found in buildings in Colorado. Southwestern Entomologist 43(1):263-265

Sitz, R. A., M. M. Zerillo, J. W. Snelling, J. I. Caballero, K. Alexander, K. Nash, N. A. Tisserat, W. S. Cranshaw, and J. E. Stewart. 2018. Drippy blight, a disease of red oaks in Colorado, U.S., produced from the combined effect of the scale insect Allokermes galliformis and the bacterium Lonsdalea quercina subsp. quercina. Arboriculture and Urban Forestry, 44(3), 146-152.

Cranshaw, W. S., S. E. Halbert, C. Favret, K. E. Britt, and G. L. Miller. 2018. Phorodon cannabis Passerini (Hemiptera: Aphididae), a newly recognized pest in North America found on industrial hemp. Insecta Mundi 0662: 1-12.

Sitz, R.A., Luna, E.K., Tisserat, N.A., Caballero, J.I., Cranshaw, W.S. and J.E. Stewart. 2017. Virulence of genetically distinct Geosmithia morbida isolates to black walnut and their response to co-inoculation with Fusarium solani. Plant Dis. 101(1):116-120.


Recently Published Books:

Cranshaw, W. and D. Shetlar. 2017. Garden Insects of North America, 2nd Edition. Princeton University Press. Princeton, N.J. 704 pp.


Cranshaw, W., W. Jacobi, D. Leatherman, and N. Tisserat. 2014. Insects and Diseases of Woody Plants in Colorado. Colorado State University Extension Bulletin 506A. 322 pp.

Cranshaw, W. and R. Redak. 2013. Bugs Rule! An Introduction to the World of Insects. Princeton University Press. Princeton, N.J. 480 pp.

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