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Black Walnut Dust Poisonous

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The toxic effects of a mature black walnut tree can extend 50 to 80 feet from the trunk of the tree with the greatest toxicity occurring within the trees dripline. The horse can absorb the toxic chemicals in walnut wood chips or dust through their hooves which can cause illness or even death so dont use walnut chips or sawdust in a horses stall.

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Black walnut dust poisonous. Walnut wood is safe to eat out of for humans. As a woodworker the dust from a black walnut can cause severe problems if inhaled. Plants tolerant to juglone will grow normally.

Although not nearly as toxic as some woods it did send a long time woodworker friend to the hospital. In this area plants susceptible to juglone may wilt or die. In fewer instances shedding pollen can cause allergic reactions in horses and people as well as kidney effects in animals that ingest hulls.

Black walnut pecan hickory and others members of the family including carya engelhardtia juglans platycarya and pterocarya can produce juglone. After doing some time killing internet staring i came across some concerns about the dustshavings being toxic. At least wear a dust mask and work outside when you can.

However in the smaller scale home landscape the leaves and fruits are considered by some to be a messy nuisance. I am in the process of building 2 smaller guitars and am using black walnut for the plates on both. Adequate dust collection while working with it and many other woods is recommended.

However the natural substances in these woods that cause the scents are also potentially toxic with greater dosage exposure and concentration. Black walnut trees are however toxic to some species of plants if growing within a certain range of the tree. The causal agent is a chemical called juglone 5 hydroxy 14 napthoquinone which occurs naturally in all parts of the black walnut.

The horse issue is real. Woods like walnut and rosewood emit pleasant odors with low levels of dust which most woodworkers equate with being one of the benefits of working with woods. The active compound in black walnut is juglone.

Apparently the antimicrobial properties of this natural chemical also make it toxic. While this substance is found in all parts of the tree beverly shaw advanced master gardener at purdue university says that the fruit roots and hulls contain the highest concentrations. Plants tolerant of black walnut toxicity black walnut juglans nigra is considered one of our most valuable native hardwood lumber trees and is often used in large scale landscapes.

But irritation is not necessarily benign. Black walnut and butternut produce the largest quantity of juglone and can cause toxic reactions with a number of other plant species that grow in their vicinity. Juglone has experimentally been shown to be a respiration inhibitor which deprives sensitive plants of needed energy for metabolic activity.

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