Ornamental Plants
Annual Reports and Research Reviews 2002

Special Circular 189

A Biological Calendar for Predicting Pest Activity:
Six Years of Plant and Insect Phenology in Secrest Arboretum

Daniel A. Herms, Department of Entomology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster, Ohio.

Literature Cited

Allen, J. C. 1976. A modified sine wave method for calculating degree-days. Environmental Entomology 5:388-396.

Dirr, M. A. 1998. Manual of Woody Landscape Plants: Their Identification, Ornamental Characteristics, Culture, Propagation and Uses. 5th Edition. Stipes Publishing Co., Champaign, Illinois.

Herms, D. A. 1999. Understanding and using degree-days. In: M. A. Rose and J. A. Chatfield, Eds. Ornamental Plants: Annual Reports and Research Reviews, 1998. pp. 70-76. The Ohio State University, Ohio Agricultural Research and Development Center, Special Circular 165, 136 pp.

Herms, D. A. 2001. Degrees of separation: using degree-days and observing blooming times to predict when insect pests emerge. American Nurseryman 194(4):34-40.

Herms, D. A. 2002. Biological clocks: a five-year calendar of plant and insect phenology in Secrest Arboretum. In: J. A. Chatfield, J.F. Boggs, E. A. Draper, H. Mathers, and A.K. Stone, Eds. Ornamental Plants: Annual Reports and Research Reviews, 2001. pp. 60-67. The Ohio State University, Ohio Agricultural Research and Development Center, Special Circular 189, 123 pp.