Identifying Butternut tree (Juglans cinerea) vs Black Walnut trees (Juglans nigra) скачать в хорошем качестве

Identifying Butternut tree (Juglans cinerea) vs Black Walnut trees (Juglans nigra)

The Butternut tree, also called White Walnut or Oilnut (Juglans cinerea) and how to distinguish it from the more common Black Walnut (Juglans nigra). I also show the Juglans hybrid, Juglans X bixbyi which is Butternut crossed with Japanese Walnut (Juglans ailanthifolia) also called Buartnut. Butternut is under threat from Butternut Canker (Ophiognomonia clavigignenti-juglandacearum) which is rapidly removing the tree from the landscape. Pure butternuts have never been demonstrated to have resistance, but some J. X bixbyi and complex hybrids have. It would be helpful to the species for many people to grow Butternuts and hybrids so that Butternut germplasm (genetic diversity) may be preserved. More detailed information on identifying Butternut hybrids can be found here: https://www.extension.purdue.edu/extm... That said, DNA analysis is the only definitive way to show an individual tree is pure Butternut and not a complex hybrid with Juglans ailanthifolia backcrossed with true Butternut. Source I used for my Buartnut and Butternut seedlings - Grimo Nut Nursery in Canada. http://www.grimonut.com/ Stark Brothers also sells Butternuts sometimes: https://www.starkbros.com/products/nu... To report a tree you can use: https://treesnap.org/ - specifically for preserving trees threatened by invasive insects and diseases. https://www.inaturalist.org/ - can be used to record the presence of any species.