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juglone

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
juglone
naphthoquinone resinoid from Juglans nigra.


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Black walnut (Juglans nigra) controls its territory with a chemical called juglone, exuded from its roots, leaves and nuts, which can kill most plants trying to grow in the surrounding soil.
Don't plant your garden near black walnuts If you've ever tried to grow tomatoes near black walnut, then you know the devastating effect the chemical juglone can have on certain plants.
Increasing with maturity, the chemical juglone is released from the trees leaves, fruit and roots where it concentrates in the soil making it very difficult for other trees (especially garden plants) to grow in their immediate vicinity.
 
 
 
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