But black walnut trees (Juglans nigra ... and nut hulls. While other types of trees also produce juglone, black walnuts and butternuts tend to cause the most problems. Plants sensitive to juglone ...
Biologists have revealed genetics behind the alternating sexes of walnut trees ... In this case, the two flowering types balance each other. If one flowering type becomes more common in the ...
Trees in the family which includes walnut, hickory and pecan take this one step further ... In this case, the two flowering types balance each other. If one flowering type becomes more common in the ...