The Fifth Annual Delaware Arborist and Tree Care Seminar will be held on March 3 and 4 from 8 a.m. to 4 p.m. each day at Hagley Museum & Soda House, 298 Buck Road, Wilmington, DE 19807. Sponsored by the Delaware Forest Service’s Urban and Community Forestry Program, the annual gathering offers classroom lectures, hands-on training, and on-site exhibits offering the latest knowledge and techniques for those interested in proper tree care and safety. This year's topics will include: crane safety for tree care workers, pesticide application, mature tree care and hazard risk assessment, new tree and shrub introductions, and how to use i-Tree to assess and manage urban forests. Cost is $90 with lunch included.