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Why do tree leaves change color in autumn?

In the language of folklore, Jack Frost has often been credited with spurring the onset of fall color by pinching leaves with his icy fingers. Obviously today we know that's not the case, but for a long time, scientists thought coloring of fall leaves was caused by the accumulation of waste...
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Benefits of Urban Trees

Urban trees provide beauty and definition to our cities and most of us have a love and appreciation of these denizens of the boulevard and backyard.  In recent years, a body of research has emerged showing even greater benefits than previously understood to both the environment and our...
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Fall Tree Planting

Most folks think of spring as the ideal planting time for trees and shrubs.  However, fall offers a nice planting window with some added benefits over the spring season, making it my favorite time of year to establish woody plants. Fall weather can create ideal planting conditions, with...
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sunshine through ash tree leaves

Enjoying the final hurrahs of a staple landscape tree

We bought a home! After six years of living in a townhouse on the edge of Macomb, we have started to burst at the seams. In that time, we have accumulated quite a few occupants in our current dwelling. Now with three kids, one dog, a cat, and a couple of Madagascar hissing cockroaches, it was time...
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Fall is for More than Tree Planting

Fall is for more than planting trees (although it is true that fall is a great time for that – see more below). Fall also is the time to do so many activities in the home landscape. These are not just weekend activities, but things that can be done in small bites, even on weekday evenings. Before...
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Poisonous Plants

How many times have you been kept up at night worrying about a poisonous plant?  Hopefully, for most of us the answer to that question will be ‘not many’.  For better or worse, humankind has not always had a well-defined separation from the plant world as we often see today.  With...
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The green foliage in this picture is bush honeysuckle, which is an invasive species that dominates forest understories in Illinois. If not weeded out...

Weeding out Invasives

The management of Illinois’ forests has become an increasingly difficult task for landowners focused on maintaining and enhancing native plant diversity. I have often thought of it as a similar process to weeding a vegetable garden, with a diverse mix of our native forest trees as the vegetable...
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illinois forest

Forest Management, HIPP and RCPP

The management of Illinois’ forests has become an increasingly difficult task for landowners focused on maintaining and enhancing native plant diversity.  I have often thought of it as a similar process to weeding a vegetable garden, with a diverse mix of our native forest trees as the...
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This rhododendron shoot is infected with the pathogen Phytopthora ramorum, displaying the typical symptoms of ramorum blight. PC UI Plant Clinic

Rapid Response to Ramorum Blight

In early July, the Illinois Department of Agriculture submitted a press release detailing the detection of a new pathogen in Illinois that threatens our native oaks. This non-native pathogen is the causal agent for a very serious disease known as sudden oak death. However, there may be some good...
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College of Agricultural, Consumer & Environmental Sciences Illinois Extension

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Urbana, IL 61801

Email: extension@illinois.edu

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