Optimizing conditions for growth and productivity of cut flowers has been my major aim in recent research and extension activities. I have also been active in promoting the use of unheated greenhouses (high tunnels) for extending the growing season of cut flowers and vegetables, and for lengthening the growing season of schools with gardening programs. I served as acting director of Cornell Plantations until January 2014.
My major research focus has been on the production and physiology of cut flowers and herbaceous perennials. Specific topics have included the reaction to daylength of sunflowers and rudbeckia, increasing productivity by apex removal, and measuring and improving sunflower vase life.
Outreach and Extension Focus
My objective is to provide timely information on new varieties and cultural practice techniques to growers of cut flowers in fields and high tunnels. Recently, a collaborative program with “Agriculture in the Classroom” is encouraging the use of high tunnels to extend the gardening season in school garden programs. Four high tunnels have been provided to rural and urban schools, and we have advised them on enhancing children’s gardening experience with these structures. International outreach activities have been focused on smallholder horticulture in southern Africa, especially in Zimbabwe.
Interaction with students is limited to graduate student advising and mentoring in the SMART program of the Cornell International Institute of Food, Agriculture and Development (CIIFAD). I have accompanied student multidisciplinary teams on two-week trips to Belize and Thailand.
- Vidal, M. G., Jong, D. D., Wien, H. C., & Morse, R. A. (2010). Pollination and fruit set in pumpkin (Cucurbita pepo) by honey bees. Revista Brasileira de Botânica (Brazilian Journal of Botany). 33:107-113.
- Wien, H. C. (2009). Floral Crop Production in High Tunnels. Hort Technology. 19:56-60.
- Wien, H. C. (2009). Microenvironmental variations within the high tunnel. HortScience. 44:235-238.
- Wien, H. C., & Pritts, M. P. (2009). Use of high tunnels in the Northeastern USA: Adaptation to cold climates. Acta Horticulturae. 87:55-59.
- Nyankanga, R. O., Olanya, M. O., Wien, H. C., El-Bedewy, R., Karinga, J., & Ojiambo, P. S. (2008). Development of tuber blight (Phytophthora infestans) on potato cultivars based on in vitro assays and field evaluations. HortScience. 43:1501-1508.
- Nyankanga, R. O., Wien, H. C., & Olanya, M. O. (2008). Effect of mulch and potato hilling on development of foliar blight (Phytophthora infestans) and the control of tuber blight infection. Potato Research. 51:101-111.
- Nyankanga, R. O., Wien, H. C., Olanya, O. M., & Ojiambo, P. S. (2007). Relationship between late blight (Phytophthora infestans) of potato on tuber and foliage, as affected by the disease severity on foliage, cultivar resistance, and atmospheric and soil variables. Canadian Journal of Plant Pathology. 29:372-387.
- Wien, H. C. (2006). Ethephon treatment may alleviate the suppression of female flowers of Cucurbita pepo under high temperatures. HortScience. 41:1421-1422.
- Vidal, M. D., DeJong, D., Wien, H. C., & Morse, R. D. (2006). Nectar and pollen production in pumpkin (Cucurbita pepo L.). Revista Brasileira de Botânica. 29:267-273.