Farmers, gardeners, and botanists have long observed that plant diseases tend to flare up during periods of high humidity, ...

Plants on remote islands get less disease — but isolation reshapes which species dominate, and those species are the most ...

Q: What is this fungus on the leaves of my shrub, and how do I treat it? – Brian K. A: The shrub is a ninebark, which is a common and important landscape shrub, and many different named cultivars are ...

Why relying on familiar plant disease names can result in the wrong diagnosis — and the wrong control strategy.

Some trees and shrubs have a bad reputation for being susceptible to diseases: lilacs to powdery mildew, junipers to juniper tip blight, flowering crabapples to apple scab, and elms to Dutch elm ...

We’ve made it to another growing season, and with summer in full throttle, you may have noticed not all the lawn, flowers, trees, shrubs and vegetables are thriving, so there may be an issue to ...

Purdue Landscape Report: Dieback and canker diseases caused by Botryosphaeria, Sphaeropsis, Diplodia and other closely related fungal pathogens are exceptionally common on woody landscape plants. This ...

Boxwoods need regular trimming and pruning to let in light, prevent fungus, and keep shrubs healthy. Best times to trim are mid-spring and late summer—avoid pruning in fall or winter. Style options ...