My research interests are in the area of both basic and applied research on weed biology, allelopathy, herbicide selectivity, perennial weed control, invasive species, and integrated weed management in field crops and turfgrass.  My research has been published in over 125 refereed journal articles or book chapters, 450 abstracts and reports, and 80 extension and popular articles.  Also, my research collaborators and/or I presented over 250 research papers at regional, national and international scientific meetings. I have extensive international experience as I traveled and participated as invited speakers in numerous international conferences and workshops in Austria, Australia, Bangladesh, Belgium, Brazil, Canada, China, Denmark, England, France, Hungary, India, Japan, Mexico, Nepal, Philippines, Poland, South Korea, and Thailand.

Current research projects:

• Biology of invasive weed species

• Allelopathic interactions of weed species

• Use of organic products for weed management

• Influence of edaphic factors in herbicide behavior

• Development of integrated weed management strategies for cool-season turfgrass