Research Publications — Dr. Bert Cregg, Associate Professor
Taylor, J.T., R.T. Fernandez, P. Nzokou, and B.M. Cregg. 2013. Carbon isotope discrimination, gas exchange, and growth of container-grown conifers under cyclic irrigation. HortScience 48:848-854.
Whittinghill, L.J., D.B. Rowe, and B.M. Cregg. 2013. Evaluation of vegetable production on extensive green roofs. Agroecology and Sustainable Food Systems 37:465-484.
Klooster, W.S., B.M. Cregg, R.T. Fernandez, and P. Nzokou. 2012. Growth and physiology of deciuous shade trees in repsone to controlled release fertilizer. Sciencia Horticulturae 135:71-79.
Tanis, S.R., B.M. Cregg, D. Mota-Sanchez, D.G. McCullough, and T.M. Poland. 2012. Spatial and temporal distribution of trunk-injected 14C-imidacloprid in Fraxinus trees. Pest Manag Sci. 68: 529-536.
Kim, S. and B.M. Cregg. 2012. Emerging methods for diagnostics and mitigation of crop environmental stress in a changing climate. HortScience 46:684-686.
Mota-Sanchez, D., B. Cregg, E. Hoffmann, J. Flore, and J.C. Wise. 2012. Penetrative and dislodgeable residue characteristics of 14C insecticides in apple fruit. J. Agric. Food Chem. 60: 2958-2966.
Warsaw, A.L., R.T. Fernandez, D.R. Kort, B.M. Cregg, B. Rowe, and C. Vandervoort. 2012. Remediation of metalaxyl, trifluralin, and nitrate from nursery runoff using container-grown woody ornamentals and phytoremediation areas. Ecol Engineering 47:254-263.
Kulac, S., P. Nzokou, D. Guney, B.M. Cregg, and I. Turna. 2012. Growth and Physiological Response of Fraser Fir [Abies fraseri (Pursh) Poir.] Seedlings to Water Stress: Seasonal and Diurnal Variations in Photosynthetic Pigments and Carbohydrate Concentration. HortScience 47:1512-1519
Wilson, A.R., P. Nzokou, and B.M.Cregg 2010. Ground covers in Fraser fir produciton: Effects on soil fertility, tree morphology and folair nutrient status. European J. Hort. Sci. 75(6) S. 269-277.
Klooster, W.S., B.M. Cregg, R.T. Fernandez, and P. Nzokou. 2010. Growth and photosynthetic response of Pot-in-pot-grown conifers to substrate and controlled-release fertilizer. HortScience 45:36-42.
Nzokou, P. and B.M. Cregg. 2010. Growth, biomass, and nitrogen use efficiency of containerized Fraser fir (Abies fraseri) as related to irrigation and nitrogen fertilization. HortScience 45:946-951.
Nzokou, P. and B.M. Cregg. 2010. Morphology and foliar chemistry of containerized Abies fraseri seedlings as affected by water availability and nutrition. Ann. For. Sci. 67:602-611.
Mota-Sanchez, D., B.M. Cregg, D,G,. McCullough, T,M. Poland, R.M. Hollingworth. 2009. Distribution of trunk-injected 14 C-imidacloprid in ash trees and effects on emerald ash borer (Coleoptera: Buprestidae) adults. Crop Protection 28:655-661.
Cregg, B.M. P. Nzokou, and R. Goldy. 2009. Growth and physiology of newly planted fraser fir (Abies fraseri) and colorado blue spruce (Picea pungens) Christmas trees in response to mulch and irrigation. HortScience 44:660-665.
Cregg, B.M. and R. Schutzki. 2009. Weed control and organic mulches affect physiology and growth of landscape shrubs. HortScience 44:1419-1424.
Gooch, N.J., P. Nzokou, and B.M. Cregg. 2009. Effect of indoor exposure on the cold hardiness and physiology of containerized Christmas trees. HortTechnology 19:72-77.
Warsaw, A.L., R.T. Fernandez, B.M. Cregg and J.A. Andresen. 2009. Water conservation, growth, and water use efficiency of container grown woody ornamentals irrigated based on daily water use. HortScience 44:1308-1318.
Nzokou, P. and B.M. Cregg and J. O'Donnell. 2008. Alternative leader growth control for Fraser fir and Korean fir. Northern J. Appl. Forestry 25:52-54.
Jones, G.E. and B.M. Cregg. 2006. Screening exotic firs for the Midwestern United States: Interspecific variation in adaptive traits. HortScience 41:242-328.
Jones, G.E. and B.M. Cregg. 2006. Budbreak and winter injury in exotic firs. HortScience 41:143-148.
Rothstein, D.E., and B.M. Cregg. 2005. Effects of nitrogen form on nutrient uptake and physiology of Fraser fir (Abies fraseri) For. Ecol. and Mgmt.219 69-80.
Zhang, J. and B.M. Cregg. 2005. Growth and physiological responses to varied environments among populations of Pinus ponderosa. For. Ecol and Mgmt. 219 1-12.
Duck, M.W., B.M. Cregg, R.T. Fernandez, and R.D. Heins 2004. Height control of Picea spp. and Chamaecyparis lawsoniana with Uniconazole and 6-Benzyladenine Journal of Environmental Horticulture 22:165-169.
Duck, M.W., B.M. Cregg, R.T. Fernandez, and R.D. Heins 2004. Controlling growth of conifers with six common plant growth retardants. HortTechnology 14(4) 1-5.
Cregg, B.M., M.W. Duck, C.M. Rios, D.B. Rowe, and M.R. Koelling 2004. Chlorophyll fluorescence and needle chlorophyll concentration of fir (Abies spp.) seedlings in response to pH. HortScience 39:1121-1125.
Cregg, B.M. 2004. Selecting trees for improving drought tolerance: theoretical and practical consideration. Acta Horticulturae 630:147-156.
Cregg, B.M., P. Nzokou, and R. Goldy. 2008. Growth and physiology of newly planted Fraser fir (Abies fraseri) and Colorado blue spruce (Picea pungens) in response to mulch. IN: Thomsen, I.M., Rasmussen, H.N. & Sørensen, J.M. (Eds.): Proceedings of the 8th International Christmas Tree Research and Extension Conference. Forest & Landscape Working Papers No. 26-2008, Forest & Landscape Denmark, Hørsholm, p.61-64.
Cregg, B.M. D. Mota-Sanchez, D.G. McCullough, T. Poland, and R.M. Hollingowrth. 2006. Distribution of 14C Imidacloprid in Fraxinus spp. and effects of imidacloprid on EAB adults. IN: Emerald Ash Borer: Research and Technology Development Meeting USDA Forest Service and USDA APHIS Forest Service Forest Health Enterprise Team Report FHTET 2005-19. pp.24-25.
Cregg, B.M. and Grant Jones. 2005. Interspecific variation in adaptive traits of true firs (Abies spp). Proc. Southern Nursery Association Aug. 8-10 Atlanta, GA.
Coleman, M.D., Coyle, D.R., Blake, J., Britton, K., Campbell, R.G., Cox, J., Cregg, B.M., Daniels, D., Jacobson, M., Johnsen, K., McDonald, T., McLeod, K., Nelson, E., Robison, D., Sanchez, F., Standturf, J., Stokes, B., Trettin, C., Tuskan, J. Wright, L., and Wullschleger, S. 2004. Production of short-rotation woody crops grown with a range of nutrient and water availability: establishment report and first-year Reponses. USDA Forest Service Southern Research Station General Technical Report SRS-72. 21 p.