Stenospermocarpic fruit linked to unmarketable black walnuts

Black walnut (Juglans nigra L.) is native to much of the eastern United States and is highly valued for its nuts and timber. Black walnut fruit generally reach most of their size by mid-August and mature by late September ...

Green spaces don't ensure biodiversity in urban areas

Planting trees and creating green space in cities is good for attracting species, but it may not be enough to ensure biodiversity in built environments, a University of Iowa study has found.

Walnut tree disease spreads to northeastern Colorado

Thousand cankers disease, a relatively new disease to Colorado that is lethal to infested black walnut trees, has now arrived in the northeast plains. The disease was confirmed in Fort Morgan through cooperative efforts of ...

Transporting firewood may spread tree-killing insects

(Phys.org) —Stocking up on firewood is on the minds of many Coloradans, with some seeking full cords for winter fuel while others are in need of only a few armloads for fall hunting trips. But because of the immense impact ...

Beetle, fungus deliver one-two punch to black walnut trees

(PhysOrg.com) -- A newly discovered disease, caused by a previously undescribed fungus hitchhiking on a tiny native bark beetle, is infecting and killing hundreds of black walnut trees in California and seven other Western ...