Invasive Issues in Trees

The Morton Arboretum 2014 Invasive Species Workshop: Invasive Issues in Trees


May 15, 2014

The Morton Arboretum
Lisle, Illinois


What invasive pests affect the many evergreens in our neighborhoods and woodlands? How much of an invasive threat is the Callery pear, one of the most popular flowering trees in city streets and home landscapes? How can we breed attractive and ornamental trees that will be sterile and therefore not invasive? These and other topics will be addressed at the third annual Morton Arboretum Invasive Species Workshop, "Invasive Issues in Trees,"  May 15 in Lisle, Illinois.

Speakers will include:

  • Plant pathologist Dennis Fulbright of Michigan State University on pests and diseases
  • Scott Blackwood of the USDA Animal and Plant Health Inspection Service on emerging invasive pests of evergreens at the national level
  • Invasive species biologist Theresa Culley of the University of Cincinnati on how horticulture has led to the invasiveness of the Callery pear
  • Tree improvement specialist Joseph Rothleutner of The Morton Arboretum on how innovative breeding techniques can produce sterile ornamental plants that will not be invasive     

As an additional educational opportunity, on Friday, May 16, Dennis Fulbright will lead a field tour of natural areas at The Morton Arboretum to continue the discussion of invasive species.

This workshop is aimed at municipal officials, arborists, conservation and restoration professionals and volunteers, landscape contractors, and others who must grapple with invasive species in Northern Illinois and the surrounding region. It is presented by The Morton Arboretum's Community Trees Program. 

It will take place at the beautiful 1,700-acre grounds of the Arboretum, a world-renowned tree museum with more than 900 acres of natural areas including oak woodlands, savannas, prairies, and wetlands.

The workshop is part of the observance of May as Invasive Species Month in Illinois. This year's ISAM theme is: "Invasive Species Affect Everyone." LEARN MORE

Click here to download  Invasive Workshop flyer.pdf


Where: The Morton Arboretum

Thornhill Education Center

4100 Illinois Route 53, Lisle, IL

(at Interstate  88 and Illinois Route 53)

When: Thursday, May 15, 2014

8:00 a.m.–3:00 p.m.



Field tour:

Friday, May 16, 8:00 a.m.–11:30 a.m.


CEUs Available

Invasive Issues in Trees is approved for PLANET Landscape Industry Certified recertification at 1 CEU per hour of instruction attended. For more information on PLANET recertification, please visit PLANET’s Recertification Center at LandcareNetwork.org.  5.5 ISA CEU's are available for participants.

Course number: 

Thornhill Education Center
Thursday May 15, 8:00 a.m.-3:00 p.m.

First speaker begins at 8:30 a.m.


Conference fee includes lunch and snacks (please bring your own coffee cup) (Limit 100).

Nonmembers: Fees include admission to the Arboretum.

Additional Field Tour fee is $20 (Limit 20).


$15.00 members
$15.00 nonmembers

CALL: 630-719-2468
IN PERSON: Stop by the Visitor Center during open hours.