Assertion: black walnut's juglone | /r/CreatedBy | black walnut
Facets:
Source sentences:
text: Several other trees produce allelopathic substances but the juglone produced by black walnut is one of the best known and most toxic.
text: Juglone is produced by several tree species, including black walnut, English walnut, Persian walnut, butternut, hickory, and pecan.
text: it's able to tolerate the juglone produced by the black walnut and other walnut tree species.