Darling-58 sprouts, a transgenic American chestnut created by ESF researchers, grow in a nutrient solution. Darling 54, a ...

Galleries of the smaller European bark beetle in elm wood. Dutch elm disease is caused by two closely related fungi, Ophiostoma ulmi and Ophiostoma novo-ulmi.Ophiostoma novo-ulmi is more aggressive ...

Joel Harrison-Off, the acting supervisor of the city’s forest healthcare and management, said the tree is one of the largest native elm trees in Toronto and was one of the few survivors of Dutch Elm ...

A native, century-old elm tree near the Christie Pits neighbourhood – and one of the largest in Toronto – was recently cut down.

One of the largest old elm trees in Toronto — possibly in all of southern Ontario — is on its last legs. But as the city finalizes plans to take down the Barton Avenue landmark next week, a ...

Idaho residents have a new summer pest to worry about: the elm seed bug (Arocatus melanocephalus). These insects, about 6 mm ...

River Forest officials marked the receipt of a CN Railway tree planting grant with a ceremonial tree planting.

A Maryland program to spot and document its biggest trees started a century ago. John Bennett is the man who keeps the ...

Ash trees are evolving resistance to a fungus which has decimated the species in recent years, a new study shows.

Despite how small they are, bonsai trees can be quite expensive; factors like tree species, age, design, and artist play into ...