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I checked and found listings re black walnut toxcicity
Juglone Sensitivity in Plants The following lists were compiled from published sources. They are based largely on observations of native woodlands, gardens, orchards, ornamental plantings, and forest plantations. Few plants have been experimentally tested for tolerance or sensitivity to juglone. Thus, the lists should be used for guidance, but not regarded as definitive.
Also the following URLs re juglones
http://www.uwex.edu/ces/wihort/landscape/Juglone.htm#top http://ohioline.osu.edu/hyg-fact/1000/1148.html http://plantclinic.cornell.edu/FactSheets/WALNUTW.HTM http://www.civicgardencentre.org/mg/juglone.htm |
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