High-value ash tree at peak fall color.
March is a good month to consider insecticide treatments for high-value ornamental ash trees this spring. Emerald ash borer (EAB) has been found in 42 Wisconsin counties and is expected to be more than 99% fatal to ash trees that are not protected with insecticide every 1-2 years. Many insecticides used in EAB treatments are applied between mid-April and mid-May, and now is a good time to contact a tree service or other pesticide application business if arranging for professional insecticide treatments.
Property owners with susceptible ash trees should consider a number of factors when deciding to treat their ash trees, including financial cost, tree condition and location, the shade a tree provides, its contribution to property values, and aesthetic view. Homeowners should also consider the financial cost of removing a tree that is killed by EAB, and the benefits that a dead tree no longer provides.
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Recently, the DNR Urban Forestry Program and the Wisconsin Arborist Association (WAA) recently held the annual Wisconsin Urban Forestry Conference in Green Bay, Wisconsin. With the theme “Healthy Benefits to Enriching Your Arboriculture and Urban Forestry Knowledge,” the conference was three full days of exhibits, presentations from experts across the world, and networking events and opportunities. There was record attendance this year, beating out last year’s record of 750. This year, the WAA offered a new Utility Track of presentations that allowed members to learn more about technologies in community forestry and other topics to help those who attended.
Gravel beds, a way of holding bare root trees and extending the bare root planting season, have been growing in popularity, especially in the Midwest. Several municipalities and other organizations throughout Wisconsin have been utilizing gravel beds to plant more trees on tight budgets, diversify plantings, decrease labor and ensure sound, healthy root systems. Hudson and Racine are wonderful examples of the success of gravel beds.