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Juglone is sometimes washed out of still green walnuts during late summer or even autumn rains. The growth of plants 60 to 80 feet away are inhibited by juglone. The substance affects plants of various families. Studies have found that tomatoes, alfalfa, potatoes, apples, blackberries, rhododendron, mountain laurel and pine trees are all affected.
According to a professor and extension forester at Iowa State University, juglone is known to repel various garden insects. Just by placing branches of tree around house and under furniture dog and cat owners are amazed to find that their pets have fewer fleas.
For more information on natural flea control:
For more information on natural garden products:
Author: Marilyn Pokorney Freelance writer of science, nature, animals and the environment. Also loves crafts, gardening, and reading. Website: http://www.apluswriting.net