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Landscaping & Gardening Information |
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Black Walnut Trees Produce A Natural Insecticide
The black walnut tree manufactures a substance that is a natural insecticide according to experts at the Texas State University in Austin. American black walnut tress contain a tannic acid chemists call juglone. The reddish yellow substance leaches from leaves, and some believe exudes from roots, or transfers from branches and foliage to the roots. Tree physiologists agree that roots of other plants that come in contact with those black walnut tree roots die--even other black walnut seedlings. Juglone is sometimes washed out of the still green walnuts during late summer or even autumn rains. The growth of plants 60 to 80 feet away are inhibited by the 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 the tree around the 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: http://www.apluswriting.net/onlynaturalpetstore/fleacontrol.htm For more information on natural garden products: http://www.apluswriting.net/garden/gardensalive.htm REQUIREMENTS FOR REPRINT: You have permission to publish this article free of charge in your e-zine, newsletter, ebook, print publication or on your website ONLY if it remains unchanged and you include the copyright and author information (Resource Box) at the end. You may not use this article in any unsolicited commercial email (spam). You may retrieve this article by: Autoresponder: juglone@getresponse.com Website: http://www.apluswriting.net/articles/juglone.txt Copyright: 2005 Marilyn Pokorney Please leave the resource box intact with an active link, and send a courtesy copy of the publication in which the article appears to: marilynp@nctc.net ------------------------------------------------------------ Author: Marilyn Pokorney Freelance writer of science, nature, animals and the environment. Also loves crafts, gardening, and reading. Website: http://www.apluswriting.net
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