Fish Kills and Nuts
Is it true that Walnuts, and hickery nuts can cause
fish kill in small ponds and lakes?
I have never heard of such a reaction. The juglone toxin in walnuts mostly
affects other plants. This helpful website includes the following quote:
"The juglone toxin occurs in the leaves, bark and wood of walnut, but these
contain lower concentrations than in the roots. Juglone is poorly soluble in
water and does not move very far in the soil."
I have never heard of any toxic reactions to hickories.
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Update: June 2012