University of Guam, Western Pacific Tropical Research Center - Research for Guam's Future
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Greg  Wiecko


PhD University of Georgia 
MSc Bydgoszcz University, Poland

Research Interests

• Turfgrass management

Contact Information:

Telephone: 671-735-2004
Cell Phone:
Fax: 671-734-4600
Contact Greg  Wiecko via email

Greg  Wiecko is currently involved in the following Fields of Study:

Publications by Greg  Wiecko:

Wiecko, G. 2014. Roof Vegetation Cuts Energy Costs on Guam. 29th Int. Hort. Congress Abstracts,  Brisbane, Australia.

Wiecko, G. 2013. Treaetment for crabgrass control in tropical turf. WSSA Annual Meeting Abstracts, Baltimore, MD.

Marler T.E., Wiecko G., Moore A. 2012.  Application of game theory to the interface between militarization and environmental stewardship in the Mariana Islands. Commun Integr Biol. 1;5(2):193-5.

Marler, T. E., A. Moore and G. Wiecko. 2011. Military Threats to Terrestrial Resources On Guam. ASA  Abstracts,  Madison WI.

Wiecko G. and O. Terral. 2010. Military Buildup. How will the environment cope? 2010 ASA  Abstracts,  Madison WI.

Wiecko. G. 2008. The Future of Experimental Farms on the Island of Guam. ASA  Abstracts,  Madison WI.

Porter G,  Yost, R. Valencia-Gica, R.  Pattnaik1 and G. Wiecko. 2008. Monitoring Soil Quality of Golf Course Fairways Irrigated with Secondary Treated Wastewater. ASA  Abstracts,  Madison WI.

Wiecko, G. and S. Hock. 2007. Control of Field Dodder with Glyphosate in the Tropics. ASA  Abstracts,  Madison WI.

Wiecko, G. 2007. Handbook of Turfgrass Management and Physiology, Chapter 7: Management of Tropical Turfgrasses (p.115-139). Mohammad Pessarakli, Editor, CRC Press LLC.

Hock, S. M., G. Wiecko, and S. Z. Knezevic. 2008. Glyphosate Affected Control of Field dodder (Cuscuta campestris) in the Tropics. Weed Technology 22(1):151-155.

Wiecko, G. 2006. Fundamentals of Tropical Turfgrass Management - Textbook for students and practitioners (213 pages).  CAB International. Oxfordshire, United Kingdom.

Wiecko, G. 2006. Challenges facing Agricultural Research Stations on Guam.  ASA  Abstracts, Madison WI.

Wiecko, G. 2005. Challenges facing Agricultural Research Stations in the American Pacific.  ASA  Abstracts, Madison WI.

Wiecko, G. 2004. Seashore paspalum - an environmental turfgrass for the future. Japanese Society of Turfgrass Science. Okinawa, Japan. November 24-26, 2004.

Wiecko, G. 2004. "Reclamation of Municipal Wastewater with Soil-Turf Filters in Tropical Climate".  ASA  Abstracts, Madison WI.

Wiecko, G. 2004. Weed control with ocean water in tropical turf. 4th International Weed Science Society Congress. Durban, Republic of South Africa. 20-24 June 2004.

Wiecko, G. 2003. Ocean water as a substitute for postemergence herbicides in the tropical turf. Weed Technology Journal. Vol.17(4) 736-741.

Wiecko, G. 2003.  "Control of  Mimosa strigillosa  and  Alysicarpus vaginalis in the tropical turf." WSSA Abstracts, Jacksonville, FL.

Wiecko, G. 2002. "Effects of cultivation and fertilization on the root distribution in compacted soil.".  ASA  Abstracts, Madison WI.

Wiecko, G. 2002. Turfgrass in the tropics requires nontraditional management. Proceedings. VII Congress of the European Society for Agronomy. Cordoba, Spain.15-18 July, 2002. 233-234.

Golabi, M.H. and G. Wiecko,  2002. "Management of eroded soils for enhancement of productivity and environmental quality".  ASA  Abstracts, Madison WI.

Wiecko, G. 2001.  "Sequential postemergence herbicide/ocean water treatments to control crabgrass in recreational turf of the Pacific Islands" WSSA Abstracts, Greensboro, N.C.

Wiecko, G. 2001. "Efficacy of post-emergence herbicides applied sequentially on salt stressed weeds in turf".  ASA  Abstracts, Madison WI.

Wiecko, G. 2000. Sequential PRE and POST herbicide treatments for goosegrass (Eleusine indica) control in bermudagrass (Cynodon dactylon) turf. Weed Tech. Vol.14. 776-782

Wiecko, G. 2000. Asian golf growth taxes bermudagrass's flexibility. Journal of Golf Course Management. Vol. 68 (2) 69-72.

Wiecko, G. 2000. Growth regulator may help in crabgrass control. Turfgrass Trends. Vol.8(7) 13-14

Wiecko, G. 2000.  "Sequential herbicide treatments for goosegrass (Eleusine indica) control in bermudagrass turf" WSSA Abstracts. Toronto, Canada.

Wiecko, G. 2000. "Turf industry in Asia grows, some challenges in turf management." China International Turfgrass Conference & Exhibition. Dalian, China.

Wiecko, G. 2000. "Usage of ocean water to control weeds in recreational turf of the Pacific Islands." Agronomy Abstracts. ASA Minneapolis, MN.

Muniappan, R, G. Wiecko, and P. Singh. 2000. Efficacy of vetiver in soil erosion control on Guam.Proceedings of the Third International Vetiver Conference, Thailand, January 10-14, 2000.

Wiecko, G. and A. Couillard, 1999. Sequential Postemergence/Preemergence Treatments for Crabgrass Control in Bermudagrass Turf. Journal of Environmental Horticulture Vol.17(3).103-107.

Wiecko, G. 1999. The Influence of Trinexapac-ethyl on the Reduction of Crabgrass Germination in 'Tifgreen' Bermudagrass Turf. ASA  Abstracts, Madison WI. 

Wiecko, G. 1999. Crabgrass (Digitaria spp.) and mimosa [Mimosa pudica (L.) D.C.] control in recreational turf on the Pacific islands using ocean water.  WSSA Abstracts.

Wiecko, G. and A. Couillard. 1998. Influence of PRE and POST herbicides on goosegrass (Elusine indica) control in bermudagrass in a tropical climate. WSSA Abstracts, p.69. 

Wiecko, G. 1998. "Efficacy of PRE herbicides applied in the tropics for crabgrass control in bermudagrass turf". Agronomy Abstracts. ASA Madison WI.

Couillard, A. and G.  Wiecko, 1998. A saline solution: seawater as a selective herbicide. Golf Course Management Vol. 66 (5) p. 54-57.

Wiecko, G.  1997. Response of Tifway bermudagrass to trinexapac-ethyl. Journal of Turfgrass Management, Vol.2 (2) p.29-36.

Wiecko, G. and A. Couillard,  1997. Response of Tifway bermudagrass to trinexapac-ethyl and chelated iron.  Journal of Turfgrass Management  Vol.2 (3) p.15-21.

Wiecko, G. Development of herbicide programme for weed control in recreational turf in a tropical climate. 1997. Proc. 10th Euro Weed Res. Soc. Symp. Poznan, Poland 22-26 June 1997.

Wiecko, G. and A. Couillard.  1997. Herbicide program for crabgrass and goosegrass control in recreational turf in a tropical climate. Agronomy Abstracts. ASA Madison WI pp.124.

Wiecko, G. 1996. “Response of ‘Tifway’ bermudagrass to trinexapac-ethyl growth regulator”  Agronomy Abstracts. ASA Madison WI, pp 139.

Wiecko, G. 1996. Bermudagrass responses to foliage application of trinexapac-ethyl, urea, and iron. Agronomy Abstracts. ASA Madison WI, pp. 144.


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