We saw some dieback in trees coming out of winter. In some cases, it is environmental stress from drought stress and winter ...

Examine any mature oak tree long enough and you’re likely to find at least some stems dying due to Botryosphaeria. Check the base of dying stems of cranberry bush viburnum and you’re likely to find a ...

When the branches of your trees and shrubs are bare in winter, you have an opportunity to spot cankers that might be hidden by leaves in summer. A canker is an area of disease in the wood of a plant.

Thousands or trees, amounting to millions of dollars in value, are dying, the victims of the most deadly plant parasite known, the chestnut canker, (Diaporthe parasitica Murrill,) for which there ...

Citrus trees are generally pretty hardy, providing delicious fruit each year. If you see signs of disease, these tips should ...

This tree is infected with the fungal pathogen that causes Pine Ghost Canker, which can be fatal for trees. (Akif Eskalen, UC Davis) Fungal pathogens that cause die-back in grape, avocado, citrus, nut ...

Despite threats of lawsuits by several South Florida cities and counties, state agriculture officials plan to send crews out in June to resume cutting trees affected by citrus canker. Some 200,000 ...

Nebraska Game & Parks confirmed that the “Old Wolf Oak” at Ponca State Park, a tree that is believed to be more than 300 ...

and attempts to dig out a borer can cause damage and leave access into the tree for diseases like Cytospora canker, so it’s important to prevent borer infestations. Mid-June, not springtime ...

GARDENER’S MAILBAG Dear Neil, I have four Leyland cypresses on a slope that feeds into a ditch that almost always has some ...

Should I spray with something? A: Unfortunately, I suspect your tree has hypoxylon canker. Usually when I see this visible powdery substance (or a black tar-like substance), the tree is showing ...