Have you ever wondered why the leaves change color during fall? Well there's a scientific word for this process called, photoperiodism. It's the organism's response to seasonal changes in day length.

Everyone knows an Iowa fall can't begin without falling leaves and autumn colors. This year, those colors might come a little sooner than usual. Here's what to know about the leaves this fall season.

Q: What are the bumps on my tree leaves, and how do I get rid of them? — Scott Langemo. A: The round, protruding bump-like growths on tree leaves are called galls. Tree types commonly affected include ...

Naturally occurring compounds in ash leaves could be linked to susceptibility of individual trees to the fungal disease ash dieback (ADB). But selecting trees with lower levels of these compounds and ...

We have several clusters of bugs in our ash tree, and I was wondering if you could identify them and let me know what to do about them. The leaves of our ash tree are curled up tightly, almost into a ...

Ash leaves are turning purple and yellow now, gardening season is winding down, and the aphids are back. While enjoying the spectacular fall color this year, you may have noticed tiny, powdery-blue, ...