Speakers

Evan Alderman
Evan is an Industry Extension Specialist with the Pesticide Safety Education Program at Iowa State University.


Michael Alonzo
Mike is Assistant Professor of Environmental Sciences at American University, Washington, DC. He started in the urban forestry world with Casey Trees as a GIS Specialist. Next, he went to UC Santa Barbara to complete a Ph.D. in geography with a focus on urban forestry inventory using hyperspectral imagery and Lidar. Now at American University he focuses on urban tree response to heat and the potential for urban trees to cool their surroundings.


John Ball
John is Professor of Forestry and Extension Forestry Specialist for South Dakota State University (Brookings, SD) where he offers courses in arboriculture and urban forestry, emergency medical technician, and rock climbing. John also serves as campus arborist. John has made countless appearances at the ISU Shade Tree Short Course and remains one of our all-time most popular and requested presenters. Will this be John’s final appearance at the STSC? I certainly hope not, but you’d better get his autograph just in case.


Scott Carlson
Scott began his career in trees in 1993 when he took a summer off from college to drag brush for the legendary Marv Folker at Marv’s Tree Service in East Moline, IL. Scott never returned to college. In 1999 Scott started Scott Carlson Certified Arborist LLC. In 2020, after 21 years in business, Scott sold the tree service to devote all of his time to educating and consulting. Now his business card reads, Scott Carlson Consulting and Appraisal LLC.


Whitney Cranshaw
Whitney is an Emeritus Professor of Entomology at Colorado State University where he has worked since 1983. During that time he presided over a wide-ranging Extension/research program to better understand and effectively manage insects of horticultural crops and landscape plants. Although retired from CSU as of July, 2020, Whitney has not retired from “bugs” and continues to support web sites, listserv discussion groups, research projects of interest, various writing projects, and speaking with groups he has always enjoyed, such as arborists.


Jim Flott
Jim is president of Community Forestry Consultants, Inc. (CFC). He received his B.S. degree in horticulture from Iowa State University and M.S. degree in forest pathology from the University of Arizona and has over 45 years of work experience in horticulture, urban forestry, and the arboriculture industry. He is an ISA Certified Arborist and Certified Municipal Specialist, American Society of Consulting Arborists Registered Consulting Arborist, PNW-ISA TRACE instructor and certified tree risk assessor, and ISA TRAQ instructor and assessor.


Richard Hauer
Rich is a Professor of Urban Forestry at the University of Wisconsin – Stevens Point, teaching courses in urban forestry, nursery management, woody plants, dendrology, and introductory forestry. He received his B.S. from the University of Wisconsin – Stevens Point, M.S. from the University of Illinois, and Ph.D. from the University of Minnesota. Rich has conducted research in tree biology, urban forest management, emerald ash borer management, trees and construction, tree risk management, and ice storms. He also is an Associate Editor of the Journal of Urban Forestry & Urban Greenspaces.


Scott Jamieson
Scott is Vice President of Community Business Partnerships and Midwest Division Leader for Bartlett Tree Experts. Prior to joining Bartlett and for nearly 20 years, Scott was with The Care of Trees, a national tree care firm based in the Chicagoland region. He received his B.S. in Urban Forestry from Purdue, M.S. degree in Urban Forestry from Michigan State, and an MBA from DePaul University in Chicago. He is a certified Enneagram instructor.


Laura Jesse Iles
Laura is an Extension Entomologist and Director of the popular ISU Plant and Insect Diagnostic Clinic. The Clinic helps growers and agribusiness professionals throughout Iowa diagnose and manage plant disease, weed, and insect problems on all kinds of plants. Laura received her M.S. and Ph.D. degrees in entomology from Iowa State University. Her favorite color is green, she enjoys listening to music from the 1960’s and 70’s, and cuddling on the couch with dogs, preferably with those that shed a lot of hair.


Gary Johnson
After 42 years as a faculty member and researcher at the Universities of New Hampshire, Maryland, and Minnesota, Gary is now a retired Professor Emeritus at the University of Minnesota. Beyond his work in academia, Gary was a licensed and practicing arborist for 11 years, a seasonal nursery worker for 10 years, and an ISA Certified Arborist for 32 years. This year, Gary will be celebrating his 116th birthday.


Donald Lewis
Donald is Professor and Extension Entomologist at Iowa State University. He is responsible for Iowa’s extension urban entomology programs and provides university outreach education on insect pest management in the areas of home and commercial vegetable and fruit production, landscape plants, turfgrass, greenhouses, and household pests. Donald arrived at ISU in 1977 after graduating with a Ph.D. from The Ohio State University and remains one of the most popular, admired, and recognized educators on the ISU campus and around the state of Iowa.


Natalie McNeill
Natalie is a graduate of the University of New Brunswick (Canada) where she earned a B.S. degree in Forestry and Environmental Management. Natalie is a District Manager for The Davey Tree Expert Company in Fort Collins, Colorado and has more than 20 years of experience in arboriculture and urban forestry. Natalie’s passion lies in the education and growth and development of future leaders in our profession. From the beginning, she has strived to find new ways to encourage strong and educated women and men to pursue their career aspirations in urban forestry.


Robin Pruisner
Robin is the State Entomologist, Bureau Chief of Entomology and Plant Science, State Seed Control Official, Ag Security Coordinator and State Hemp Administrator for the Iowa Department of Agriculture and Land Stewardship. As a “larva”, row crop pests initially captured her attention, but in recent years she’s been drawn to plant pests outside of corn fields.


Lina Rodriguez Salamanca
Dr. Lina Rodriguez-Salamanca is a diagnostician and extension plant pathologist with the Iowa State University Plant and Insect Diagnostic Clinic (clinic.ipm.iastate.edu), a National Plant Diagnostic Network member.

Lina’s responsibilities in the clinic include plant problem diagnosis of diseases (plant pathogens identification) accurately and rapidly with a focus on ornamental, horticultural plants/crops, and tree samples submitted to the clinic. She implements plant pathogen molecular detection methods. She develops protocols to conform to the laboratory quality management system. Manage and supervise lab assistants.

Lina focuses her efforts on disease diagnosis and its importance in disease management and IPM implementation. Provide disease and pest (IPM) management recommendations to clients submitting samples, phone, and email inquiries. Develop and deliver extension and outreach curriculum including workshops, print, video, and web-based curriculum related to plant disease management.


Elizabeth Schulte
Elizabeth is the Director of Marketing at PlanIT Geo, a Colorado based company focusing on urban forestry consulting and software development. She is a Certified Arborist and graduate of Northeast Iowa Community College in arboriculture, and Western Illinois University in urban forestry. Her previous employer was the Wisconsin Department of Natural Resources Urban Forestry Program, where she engaged communities across the state to acquire grant funding, education, and learn management tactics.


Ross Shrigley
Ross’s passion for horticulture and gardening began at Colorado State University where he earned his degree in biology in 1994. From there he went on to run his own small gardening business, serve as horticulturist at the Denver Botanic Gardens, work as outside sales representative at Fort Collins Wholesale Nursery, and now is Executive Director of Plant Select, a non-profit collaboration between Colorado State University, Denver Botanic Gardens, and professional horticulturists.


Scott Skogerboe
Scott has been the plant propagator for Fort Collins Wholesale Nursery for 30 years. Over his long career he has grown over 7 million trees and shrubs which are now scattered across the northern tier states from coast to coast. He earned his B.S. degree (nursery management/horticulture) from Colorado State University and in 2016 was named Commercial Horticulturist of the Year by the American Horticulture Society. His fifteen minutes of fame came when he found the last remaining tree planted by Johnny Appleseed.


Guy Sternberg
Guy is a certified arborist, adjunct faculty member in Biology at Illinois College, adjunct research associate in Botany at the Illinois State Museum, and a lifelong volunteer and organizer saving ancient and historic trees. Throughout the past decade he has become the de-facto field general in the Great Borer War, enlisting volunteer help for saving ash trees at his arboretum (Starhill Forest) as well as in parks, road rights-of-way, and nature preserves throughout central Illinois.


Grant Thompson
Grant is an Assistant Professor in the ISU Department of Horticulture, specializing in sustainable landscape management with a specific focus on improving soil health and plant establishment in constructed environments. He earned dual bachelors’ degrees from ISU in horticulture and landscape architecture. He then went on to earn M.S. and Ph.D. degrees from Cornell University while conducting research in urban ecology and biodiversity and ecosystem functioning. Before entering graduate school, Grant practiced design and landscape architecture in central Iowa for about 5 years.


Mark Vitosh
Mark Vitosh is District Forester for the Iowa Department of Natural Resources Forests and Prairies Division, District 13, based out of Iowa City. He assists private landowners in managing their forest resources in Johnson, Linn, Iowa, Benton, Poweshiek, and Muscatine counties. Mark earned B.S. and M.S. degrees in forestry from Iowa State University in 1988 and 1998, respectively. As most of you know, Mark is one of our most beloved state employees and has been a friend of the ISU Shade Tree Short Course for well over two decades. Outside of work, Mark enjoys cycling, mushroom hunting, being a very cool grandfather, and serving as president of the Iowa Chapter of the “Free Britney Movement”.


Fred Whitford
Fred is a Clinical Engagement Professor in the Department of Botany and Plant Pathology at Purdue University, and Director of Purdue Pesticide Programs. He received his M.S. and Ph.D. degrees in entomology from Iowa State University. His expertise is in pesticide safety education, pesticide registration, regulations, insurance, and environmental and safety audits. Fred has authored more than 300 publications and given more than 6,100 presentations throughout the United States. Fred has become a “regular” at the ISU Shade Tree Short Course, and for very good reason. Nice to see you again Dr. Whitford!