Vita: Pdf or RTF Format
Areas of expertise:
Nurseries - insects/mites, Landscape/insects, Landscape/turfgrass IPM, Christmas trees/insects
Other information:
B.S. & M.S. in Zoology, University of Oklahoma
Ph.D. in Entomology, Penn State University Current Research Projects:
Monitoring and assessing seasonal populations of sod webworms, hairy chinch bug and bluegrass billbug. Light trap samples have been taken for approximately 18 year/locations and the sod webworms species and northern masked chafer adults have been identified and tallied. However, these data do not help determine larval behavior during an entire season. Studies are to be initiated to take periodic samples and extract the sod webworm larvae to determine life tables. An ongoing project is evaluating hairy chinch bug populations in lawns with a specific interest on how the Beauveria fungal disease appears to be failing to control populations during times of moisture.
Many new insecticides and/or formulations are being evaluated each year to determine their spectrum of activity (types of turfgrass insect pests contolled) and timing strategies (preventive, curative, rescue)
Recent Publications:
Williamson, R.C. and D.J. Shetlar. 1995. Oviposition, egg location and diel periodicity of feeding by black cutworm (Lepidoptera: Noctuidae) on bentgrass maintained at golf course cutting heights. J. Econ. Entomol. 88(5): 1292-1295.
Watsche, T.L., P.H. Dernoeden and D.J. Shetlar. 1995. Managing Turfgrass Pests. (wrote Chapter 3. Turfgrass insect and mite management. pp. 157-325.) Lewis Publ., CRC Press, Inc., Boca Raton, FL.
Shetlar, D.J. 1995. Key to Turfgrass Injury (pp. 11-13); Key to Invertebrate Turfgrass Pests (pp.14-20); Billbugs (pp. 32-34) and Cutworms (pp. 46-48). In: Brandenburg, R.L. & M.G. Villani (Eds.), Handbook of Turfgrass Insect Pests, Entomological Society of America, Lanham, MD. (140pp.)
Baxendale, F.P. and D.J. Shetlar. 1995. Mealybugs (pp. 76-77). In: Brandenburg, R.L. & M.G. Villani (Eds.), Handbook of Turfgrass Insect Pests, ESA, Lanham, MD. (140pp.)
Richmond, D.S. and D.J. Shetlar. 1996. Eclosion time and spatial distribution of overwintering spruce spider mite (Acari: Tetranychidae) eggs on Colorado spruce. J. Econ. Entomol. 89(2): 447-452.
Richmond, D.S. and D.J. Shetlar. 1999. Larval survival and movement of bluegrass webworm in mixed stands of endophytic perennial ryegrass and Kentucky bluegrass. J. Econ. Entomol. 92(6): 1329-1334.
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